mirror of
https://github.com/torvalds/linux.git
synced 2026-08-12 10:27:20 +02:00
9913d5745b
36303 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Steven Rostedt (VMware)
|
9913d5745b |
tracepoint: Add tracepoint_probe_register_may_exist() for BPF tracing
All internal use cases for tracepoint_probe_register() is set to not ever
be called with the same function and data. If it is, it is considered a
bug, as that means the accounting of handling tracepoints is corrupted.
If the function and data for a tracepoint is already registered when
tracepoint_probe_register() is called, it will call WARN_ON_ONCE() and
return with EEXISTS.
The BPF system call can end up calling tracepoint_probe_register() with
the same data, which now means that this can trigger the warning because
of a user space process. As WARN_ON_ONCE() should not be called because
user space called a system call with bad data, there needs to be a way to
register a tracepoint without triggering a warning.
Enter tracepoint_probe_register_may_exist(), which can be called, but will
not cause a WARN_ON() if the probe already exists. It will still error out
with EEXIST, which will then be sent to the user space that performed the
BPF system call.
This keeps the previous testing for issues with other users of the
tracepoint code, while letting BPF call it with duplicated data and not
warn about it.
Link: https://lore.kernel.org/lkml/20210626135845.4080-1-penguin-kernel@I-love.SAKURA.ne.jp/
Link: https://syzkaller.appspot.com/bug?id=41f4318cf01762389f4d1c1c459da4f542fe5153
Cc: stable@vger.kernel.org
Fixes:
|
||
|
Daniel Bristot de Oliveira
|
498627b4ac |
trace/osnoise: Fix return value on osnoise_init_hotplug_support
kernel test robot reported:
>> kernel/trace/trace_osnoise.c:1584:2: error: void function
'osnoise_init_hotplug_support' should not return a
value [-Wreturn-type]
return 0;
When !CONFIG_HOTPLUG_CPU.
Fix it problem by removing the return value.
Link: https://lkml.kernel.org/r/c7fc67f1a117cc88bab2e508c898634872795341.1624872608.git.bristot@redhat.com
Fixes:
|
||
|
Daniel Bristot de Oliveira
|
2a81afa326 |
trace/osnoise: Make interval u64 on osnoise_main
kernel test robot reported:
>> kernel/trace/trace_osnoise.c:966:3: warning: comparison of distinct
pointer types ('typeof ((interval)) *' (aka 'long long *') and
'uint64_t *' (aka 'unsigned long long *'))
[-Wcompare-distinct-pointer-types]
do_div(interval, USEC_PER_MSEC);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/asm-generic/div64.h:228:28: note: expanded from macro 'do_div'
(void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~
As interval cannot be negative because sample_period >= sample_runtime,
making interval u64 on osnoise_main() is enough to fix this problem.
Link: https://lkml.kernel.org/r/4ae1e7780563598563de079a3ef6d4d10b5f5546.1624872608.git.bristot@redhat.com
Fixes:
|
||
|
Daniel Bristot de Oliveira
|
f7d9f6370e |
trace/osnoise: Fix 'no previous prototype' warnings
kernel test robot reported some osnoise functions with "no previous
prototype."
Fix these warnings by making local functions static, and by adding:
void osnoise_trace_irq_entry(int id);
void osnoise_trace_irq_exit(int id, const char *desc);
to include/linux/trace.h.
Link: https://lkml.kernel.org/r/e40d3cb4be8bde921f4b40fa6a095cf85ab807bd.1624872608.git.bristot@redhat.com
Fixes:
|
||
|
Steven Rostedt (VMware)
|
b96285e10a |
tracing: Have osnoise_main() add a quiescent state for task rcu
ftracetest triggered:
INFO: rcu_tasks detected stalls on tasks:
00000000b92b832d: .. nvcsw: 1/1 holdout: 1 idle_cpu: -1/7
task:osnoise/7 state:R running task stack: 0 pid: 2133 ppid: 2 flags:0x00004000
Call Trace:
? asm_sysvec_apic_timer_interrupt+0x12/0x20
? asm_sysvec_apic_timer_interrupt+0x12/0x20
? trace_hardirqs_on+0x2b/0xe0
? asm_sysvec_apic_timer_interrupt+0x12/0x20
? trace_clock_local+0xc/0x20
? osnoise_main+0x10e/0x450
? trace_softirq_entry_callback+0x50/0x50
? kthread+0x153/0x170
? __kthread_bind_mask+0x60/0x60
? ret_from_fork+0x22/0x30
While running osnoise tracer with other tracers that rely on
synchronize_rcu_tasks(), where that just hung.
The reason is that osnoise_main() never schedules out if the interval
is less than 1, and this will cause synchronize_rcu_tasks() to never
return.
Link: https://lkml.kernel.org/r/20210628114953.6dc06a91@oasis.local.home
Fixes:
|
||
|
Daniel Bristot de Oliveira
|
c8895e271f |
trace/osnoise: Support hotplug operations
Enable and disable osnoise/timerlat thread during on CPU hotplug online and offline operations respectivelly. Link: https://lore.kernel.org/linux-doc/20210621134636.5b332226@oasis.local.home/ Link: https://lkml.kernel.org/r/39f98590b3caeb3c32f09526214058efe0e9272a.1624372313.git.bristot@redhat.com Cc: Phil Auld <pauld@redhat.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Kate Carcia <kcarcia@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Alexandre Chartre <alexandre.chartre@oracle.com> Cc: Clark Willaims <williams@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Suggested-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Daniel Bristot de Oliveira
|
ba998f7d95 |
trace/hwlat: Support hotplug operations
Enable and disable hwlat thread during cpu hotplug online and offline operations, respectivelly. Link: https://lore.kernel.org/linux-doc/20210621134636.5b332226@oasis.local.home/ Link: https://lkml.kernel.org/r/52012d25ea35491a0f8088b947864d8df8e25157.1624372313.git.bristot@redhat.com Cc: Phil Auld <pauld@redhat.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Kate Carcia <kcarcia@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Alexandre Chartre <alexandre.chartre@oracle.com> Cc: Clark Willaims <williams@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Suggested-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Daniel Bristot de Oliveira
|
039a602db3 |
trace/hwlat: Protect kdata->kthread with get/put_online_cpus
In preparation to the hotplug support, protect kdata->kthread with get/put_online_cpus() to avoid concurrency with hotplug operations. Link: https://lore.kernel.org/linux-doc/20210621134636.5b332226@oasis.local.home/ Link: https://lkml.kernel.org/r/8bdb2a56f46abfd301d6fffbf43448380c09a6f5.1624372313.git.bristot@redhat.com Cc: Phil Auld <pauld@redhat.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Kate Carcia <kcarcia@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Alexandre Chartre <alexandre.chartre@oracle.com> Cc: Clark Willaims <williams@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Suggested-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Daniel Bristot de Oliveira
|
a955d7eac1 |
trace: Add timerlat tracer
The timerlat tracer aims to help the preemptive kernel developers to
found souces of wakeup latencies of real-time threads. Like cyclictest,
the tracer sets a periodic timer that wakes up a thread. The thread then
computes a *wakeup latency* value as the difference between the *current
time* and the *absolute time* that the timer was set to expire. The main
goal of timerlat is tracing in such a way to help kernel developers.
Usage
Write the ASCII text "timerlat" into the current_tracer file of the
tracing system (generally mounted at /sys/kernel/tracing).
For example:
[root@f32 ~]# cd /sys/kernel/tracing/
[root@f32 tracing]# echo timerlat > current_tracer
It is possible to follow the trace by reading the trace trace file:
[root@f32 tracing]# cat trace
# tracer: timerlat
#
# _-----=> irqs-off
# / _----=> need-resched
# | / _---=> hardirq/softirq
# || / _--=> preempt-depth
# || /
# |||| ACTIVATION
# TASK-PID CPU# |||| TIMESTAMP ID CONTEXT LATENCY
# | | | |||| | | | |
<idle>-0 [000] d.h1 54.029328: #1 context irq timer_latency 932 ns
<...>-867 [000] .... 54.029339: #1 context thread timer_latency 11700 ns
<idle>-0 [001] dNh1 54.029346: #1 context irq timer_latency 2833 ns
<...>-868 [001] .... 54.029353: #1 context thread timer_latency 9820 ns
<idle>-0 [000] d.h1 54.030328: #2 context irq timer_latency 769 ns
<...>-867 [000] .... 54.030330: #2 context thread timer_latency 3070 ns
<idle>-0 [001] d.h1 54.030344: #2 context irq timer_latency 935 ns
<...>-868 [001] .... 54.030347: #2 context thread timer_latency 4351 ns
The tracer creates a per-cpu kernel thread with real-time priority that
prints two lines at every activation. The first is the *timer latency*
observed at the *hardirq* context before the activation of the thread.
The second is the *timer latency* observed by the thread, which is the
same level that cyclictest reports. The ACTIVATION ID field
serves to relate the *irq* execution to its respective *thread* execution.
The irq/thread splitting is important to clarify at which context
the unexpected high value is coming from. The *irq* context can be
delayed by hardware related actions, such as SMIs, NMIs, IRQs
or by a thread masking interrupts. Once the timer happens, the delay
can also be influenced by blocking caused by threads. For example, by
postponing the scheduler execution via preempt_disable(), by the
scheduler execution, or by masking interrupts. Threads can
also be delayed by the interference from other threads and IRQs.
The timerlat can also take advantage of the osnoise: traceevents.
For example:
[root@f32 ~]# cd /sys/kernel/tracing/
[root@f32 tracing]# echo timerlat > current_tracer
[root@f32 tracing]# echo osnoise > set_event
[root@f32 tracing]# echo 25 > osnoise/stop_tracing_total_us
[root@f32 tracing]# tail -10 trace
cc1-87882 [005] d..h... 548.771078: #402268 context irq timer_latency 1585 ns
cc1-87882 [005] dNLh1.. 548.771082: irq_noise: local_timer:236 start 548.771077442 duration 4597 ns
cc1-87882 [005] dNLh2.. 548.771083: irq_noise: reschedule:253 start 548.771083017 duration 56 ns
cc1-87882 [005] dNLh2.. 548.771086: irq_noise: call_function_single:251 start 548.771083811 duration 2048 ns
cc1-87882 [005] dNLh2.. 548.771088: irq_noise: call_function_single:251 start 548.771086814 duration 1495 ns
cc1-87882 [005] dNLh2.. 548.771091: irq_noise: call_function_single:251 start 548.771089194 duration 1558 ns
cc1-87882 [005] dNLh2.. 548.771094: irq_noise: call_function_single:251 start 548.771091719 duration 1932 ns
cc1-87882 [005] dNLh2.. 548.771096: irq_noise: call_function_single:251 start 548.771094696 duration 1050 ns
cc1-87882 [005] d...3.. 548.771101: thread_noise: cc1:87882 start 548.771078243 duration 10909 ns
timerlat/5-1035 [005] ....... 548.771103: #402268 context thread timer_latency 25960 ns
For further information see: Documentation/trace/timerlat-tracer.rst
Link: https://lkml.kernel.org/r/71f18efc013e1194bcaea1e54db957de2b19ba62.1624372313.git.bristot@redhat.com
Cc: Phil Auld <pauld@redhat.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Kate Carcia <kcarcia@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Alexandre Chartre <alexandre.chartre@oracle.com>
Cc: Clark Willaims <williams@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
|
||
|
Daniel Bristot de Oliveira
|
bce29ac9ce |
trace: Add osnoise tracer
In the context of high-performance computing (HPC), the Operating System
Noise (*osnoise*) refers to the interference experienced by an application
due to activities inside the operating system. In the context of Linux,
NMIs, IRQs, SoftIRQs, and any other system thread can cause noise to the
system. Moreover, hardware-related jobs can also cause noise, for example,
via SMIs.
The osnoise tracer leverages the hwlat_detector by running a similar
loop with preemption, SoftIRQs and IRQs enabled, thus allowing all
the sources of *osnoise* during its execution. Using the same approach
of hwlat, osnoise takes note of the entry and exit point of any
source of interferences, increasing a per-cpu interference counter. The
osnoise tracer also saves an interference counter for each source of
interference. The interference counter for NMI, IRQs, SoftIRQs, and
threads is increased anytime the tool observes these interferences' entry
events. When a noise happens without any interference from the operating
system level, the hardware noise counter increases, pointing to a
hardware-related noise. In this way, osnoise can account for any
source of interference. At the end of the period, the osnoise tracer
prints the sum of all noise, the max single noise, the percentage of CPU
available for the thread, and the counters for the noise sources.
Usage
Write the ASCII text "osnoise" into the current_tracer file of the
tracing system (generally mounted at /sys/kernel/tracing).
For example::
[root@f32 ~]# cd /sys/kernel/tracing/
[root@f32 tracing]# echo osnoise > current_tracer
It is possible to follow the trace by reading the trace trace file::
[root@f32 tracing]# cat trace
# tracer: osnoise
#
# _-----=> irqs-off
# / _----=> need-resched
# | / _---=> hardirq/softirq
# || / _--=> preempt-depth MAX
# || / SINGLE Interference counters:
# |||| RUNTIME NOISE % OF CPU NOISE +-----------------------------+
# TASK-PID CPU# |||| TIMESTAMP IN US IN US AVAILABLE IN US HW NMI IRQ SIRQ THREAD
# | | | |||| | | | | | | | | | |
<...>-859 [000] .... 81.637220: 1000000 190 99.98100 9 18 0 1007 18 1
<...>-860 [001] .... 81.638154: 1000000 656 99.93440 74 23 0 1006 16 3
<...>-861 [002] .... 81.638193: 1000000 5675 99.43250 202 6 0 1013 25 21
<...>-862 [003] .... 81.638242: 1000000 125 99.98750 45 1 0 1011 23 0
<...>-863 [004] .... 81.638260: 1000000 1721 99.82790 168 7 0 1002 49 41
<...>-864 [005] .... 81.638286: 1000000 263 99.97370 57 6 0 1006 26 2
<...>-865 [006] .... 81.638302: 1000000 109 99.98910 21 3 0 1006 18 1
<...>-866 [007] .... 81.638326: 1000000 7816 99.21840 107 8 0 1016 39 19
In addition to the regular trace fields (from TASK-PID to TIMESTAMP), the
tracer prints a message at the end of each period for each CPU that is
running an osnoise/CPU thread. The osnoise specific fields report:
- The RUNTIME IN USE reports the amount of time in microseconds that
the osnoise thread kept looping reading the time.
- The NOISE IN US reports the sum of noise in microseconds observed
by the osnoise tracer during the associated runtime.
- The % OF CPU AVAILABLE reports the percentage of CPU available for
the osnoise thread during the runtime window.
- The MAX SINGLE NOISE IN US reports the maximum single noise observed
during the runtime window.
- The Interference counters display how many each of the respective
interference happened during the runtime window.
Note that the example above shows a high number of HW noise samples.
The reason being is that this sample was taken on a virtual machine,
and the host interference is detected as a hardware interference.
Tracer options
The tracer has a set of options inside the osnoise directory, they are:
- osnoise/cpus: CPUs at which a osnoise thread will execute.
- osnoise/period_us: the period of the osnoise thread.
- osnoise/runtime_us: how long an osnoise thread will look for noise.
- osnoise/stop_tracing_us: stop the system tracing if a single noise
higher than the configured value happens. Writing 0 disables this
option.
- osnoise/stop_tracing_total_us: stop the system tracing if total noise
higher than the configured value happens. Writing 0 disables this
option.
- tracing_threshold: the minimum delta between two time() reads to be
considered as noise, in us. When set to 0, the default value will
be used, which is currently 5 us.
Additional Tracing
In addition to the tracer, a set of tracepoints were added to
facilitate the identification of the osnoise source.
- osnoise:sample_threshold: printed anytime a noise is higher than
the configurable tolerance_ns.
- osnoise:nmi_noise: noise from NMI, including the duration.
- osnoise:irq_noise: noise from an IRQ, including the duration.
- osnoise:softirq_noise: noise from a SoftIRQ, including the
duration.
- osnoise:thread_noise: noise from a thread, including the duration.
Note that all the values are *net values*. For example, if while osnoise
is running, another thread preempts the osnoise thread, it will start a
thread_noise duration at the start. Then, an IRQ takes place, preempting
the thread_noise, starting a irq_noise. When the IRQ ends its execution,
it will compute its duration, and this duration will be subtracted from
the thread_noise, in such a way as to avoid the double accounting of the
IRQ execution. This logic is valid for all sources of noise.
Here is one example of the usage of these tracepoints::
osnoise/8-961 [008] d.h. 5789.857532: irq_noise: local_timer:236 start 5789.857529929 duration 1845 ns
osnoise/8-961 [008] dNh. 5789.858408: irq_noise: local_timer:236 start 5789.858404871 duration 2848 ns
migration/8-54 [008] d... 5789.858413: thread_noise: migration/8:54 start 5789.858409300 duration 3068 ns
osnoise/8-961 [008] .... 5789.858413: sample_threshold: start 5789.858404555 duration 8723 ns interferences 2
In this example, a noise sample of 8 microseconds was reported in the last
line, pointing to two interferences. Looking backward in the trace, the
two previous entries were about the migration thread running after a
timer IRQ execution. The first event is not part of the noise because
it took place one millisecond before.
It is worth noticing that the sum of the duration reported in the
tracepoints is smaller than eight us reported in the sample_threshold.
The reason roots in the overhead of the entry and exit code that happens
before and after any interference execution. This justifies the dual
approach: measuring thread and tracing.
Link: https://lkml.kernel.org/r/e649467042d60e7b62714c9c6751a56299d15119.1624372313.git.bristot@redhat.com
Cc: Phil Auld <pauld@redhat.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Kate Carcia <kcarcia@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Alexandre Chartre <alexandre.chartre@oracle.com>
Cc: Clark Willaims <williams@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com>
[
Made the following functions static:
trace_irqentry_callback()
trace_irqexit_callback()
trace_intel_irqentry_callback()
trace_intel_irqexit_callback()
Added to include/trace.h:
osnoise_arch_register()
osnoise_arch_unregister()
Fixed define logic for LATENCY_FS_NOTIFY
Reported-by: kernel test robot <lkp@intel.com>
]
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
|
||
|
Steven Rostedt (VMware)
|
6880c987e4 |
tracing: Add LATENCY_FS_NOTIFY to define if latency_fsnotify() is defined
With the coming addition of the osnoise tracer, the configs needed to include the latency_fsnotify() has become more complex, and to keep the declaration in the header file the same as in the C file, just have the logic needed to define it in one place, and that defines LATENCY_FS_NOTIFY which will be used in the C code. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Daniel Bristot de Oliveira
|
aa892f8c88 |
trace/hwlat: Remove printk from sampling loop
hwlat has some time operation checks on the sample loop, and it is currently using pr_err (printk) to report them. The problem is that this can lead the system to an unresponsible state due to an overflow of printk messages. This problem can be mitigated by writing the error message to the trace buffer. Remove the printk messages from the sampling loop, switching the to messages in the trace buffer. No functional change. Link: https://lkml.kernel.org/r/9d77c34869748aa105e965c769d24642914eea3a.1624372313.git.bristot@redhat.com Cc: Phil Auld <pauld@redhat.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Kate Carcia <kcarcia@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Alexandre Chartre <alexandre.chartre@oracle.com> Cc: Clark Willaims <williams@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Daniel Bristot de Oliveira
|
f27a1c9e1b |
trace/hwlat: Use trace_min_max_param for width and window params
Use the trace_min_max_param to reduce code duplication. No functional change. Link: https://lkml.kernel.org/r/b91accd5a7c6c14ea02d3379aae974ba22b47dd6.1624372313.git.bristot@redhat.com Cc: Phil Auld <pauld@redhat.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Kate Carcia <kcarcia@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Alexandre Chartre <alexandre.chartre@oracle.com> Cc: Clark Willaims <williams@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Daniel Bristot de Oliveira
|
bc87cf0a08 |
trace: Add a generic function to read/write u64 values from tracefs
The hwlat detector and (in preparation for) the osnoise/timerlat tracers
have a set of u64 parameters that the user can read/write via tracefs.
For instance, we have hwlat_detector's window and width.
To reduce the code duplication, hwlat's window and width share the same
read function. However, they do not share the write functions because
they do different parameter checks. For instance, the width needs to
be smaller than the window, while the window needs to be larger
than the window. The same pattern repeats on osnoise/timerlat, and
a large portion of the code was devoted to the write function.
Despite having different checks, the write functions have the same
structure:
read a user-space buffer
take the lock that protects the value
check for minimum and maximum acceptable values
save the value
release the lock
return success or error
To reduce the code duplication also in the write functions, this patch
provides a generic read and write implementation for u64 values that
need to be within some minimum and/or maximum parameters, while
(potentially) being protected by a lock.
To use this interface, the structure trace_min_max_param needs to be
filled:
struct trace_min_max_param {
struct mutex *lock;
u64 *val;
u64 *min;
u64 *max;
};
The desired value is stored on the variable pointed by *val. If *min
points to a minimum acceptable value, it will be checked during the
write operation. Likewise, if *max points to a maximum allowable value,
it will be checked during the write operation. Finally, if *lock points
to a mutex, it will be taken at the beginning of the operation and
released at the end.
The definition of a trace_min_max_param needs to passed as the
(private) *data for tracefs_create_file(), and the trace_min_max_fops
(added by this patch) as the *fops file_operations.
Link: https://lkml.kernel.org/r/3e35760a7c8b5c55f16ae5ad5fc54a0e71cbe647.1624372313.git.bristot@redhat.com
Cc: Phil Auld <pauld@redhat.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Kate Carcia <kcarcia@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Alexandre Chartre <alexandre.chartre@oracle.com>
Cc: Clark Willaims <williams@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
|
||
|
Daniel Bristot de Oliveira
|
f46b16520a |
trace/hwlat: Implement the per-cpu mode
Implements the per-cpu mode in which a sampling thread is created for each cpu in the "cpus" (and tracing_mask). The per-cpu mode has the potention to speed up the hwlat detection by running on multiple CPUs at the same time, at the cost of higher cpu usage with irqs disabled. Use with care. [ Changed get_cpu_data() to static. Reported-by: kernel test robot <lkp@intel.com> ] Link: https://lkml.kernel.org/r/ec06d0ab340e8460d293772faba19ad8a5c371aa.1624372313.git.bristot@redhat.com Cc: Phil Auld <pauld@redhat.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Kate Carcia <kcarcia@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Alexandre Chartre <alexandre.chartre@oracle.com> Cc: Clark Willaims <williams@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Daniel Bristot de Oliveira
|
7bb7d802af |
trace/hwlat: Switch disable_migrate to mode none
When in the round-robin mode, if the tracer detects a change in the hwlatd thread affinity by an external tool, e.g., taskset, the round-robin logic is disabled. The disable_migrate variable currently tracks this. With the addition of the "mode" config and the mode "none," the disable_migrate logic is equivalent to switch to the "none" mode. Hence, instead of using a hidden variable to track this behavior, switch the mode to none, informing the user about this change. Link: https://lkml.kernel.org/r/a679af672458d6b1f62252605905c5214030f247.1624372313.git.bristot@redhat.com Cc: Phil Auld <pauld@redhat.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Kate Carcia <kcarcia@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Alexandre Chartre <alexandre.chartre@oracle.com> Cc: Clark Willaims <williams@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Daniel Bristot de Oliveira
|
8fa826b734 |
trace/hwlat: Implement the mode config option
Provides the "mode" config to the hardware latency detector. hwlatd has two different operation modes. The default mode is the "round-robin" one, in which a single hwlatd thread runs, migrating among the allowed CPUs in a "round-robin" fashion. This is the current behavior. The "none" sets the allowed cpumask for a single hwlatd thread at the startup, but skips the round-robin, letting the scheduler handle the migration. In preparation to the per-cpu mode. Link: https://lkml.kernel.org/r/f3b1271262aa030c680e26615c1b9b2d71e55e92.1624372313.git.bristot@redhat.com Cc: Phil Auld <pauld@redhat.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Kate Carcia <kcarcia@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Alexandre Chartre <alexandre.chartre@oracle.com> Cc: Clark Willaims <williams@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Daniel Bristot de Oliveira
|
bb1b24cf41 |
trace/hwlat: Fix Clark's email
Clark's email is williams@redhat.com. No functional change. Link: https://lkml.kernel.org/r/6fa4b49e17ab8a1ff19c335ab7cde38d8afb0e29.1624372313.git.bristot@redhat.com Cc: Phil Auld <pauld@redhat.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Kate Carcia <kcarcia@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Alexandre Chartre <alexandre.chartre@oracle.com> Cc: Clark Willaims <williams@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Steven Rostedt (VMware)
|
2db7ab6b4c |
tracing: Have ftrace_dump_on_oops kernel parameter take numbers
The kernel parameter for ftrace_dump_on_oops can take a single assignment. That is, it can be: ftrace_dump_on_oops or ftrace_dump_on_oops=orig_cpu But the content in the sysctl file is a number. 0 for disabled 1 for ftrace_dump_on_oops (all CPUs) 2 for ftrace_dump_on_oops (orig CPU) Allow the kernel command line to take a number as well to match the sysctl numbers. That is: ftrace_dump_on_oops=1 is the same as ftrace_dump_on_oops and ftrace_dump_on_oops=2 is the same as ftrace_dump_on_oops=orig_cpu Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Steven Rostedt (VMware)
|
f38601368f |
tracing: Add tp_printk_stop_on_boot option
Add a kernel command line option that disables printing of events to console at late_initcall_sync(). This is useful when needing to see specific events written to console on boot up, but not wanting it when user space starts, as user space may make the console so noisy that the system becomes inoperable. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Steven Rostedt (VMware)
|
8f0901cda1 |
tracing: Add better comments for the filtering temp buffer use case
When filtering is enabled, the event is copied into a temp buffer instead of being written into the ring buffer directly, because the discarding of events from the ring buffer is very expensive, and doing the extra copy is much faster than having to discard most of the time. As that logic is subtle, add comments to explain in more detail to what is going on and how it works. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Steven Rostedt (VMware)
|
faa76a6c28 |
tracing: Simplify the max length test when using the filtering temp buffer
When filtering trace events, a temp buffer is used because the extra copy from the temp buffer into the ring buffer is still faster than the direct write into the ring buffer followed by a discard if the filter does not match. But the data that can be stored in the temp buffer is a PAGE_SIZE minus the ring buffer event header. The calculation of that header size is complex, but using the helper macro "struct_size()" can simplify it. Link: https://lore.kernel.org/stable/CAHk-=whKbJkuVmzb0hD3N6q7veprUrSpiBHRxVY=AffWZPtxmg@mail.gmail.com/ Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Masami Hiramatsu
|
4f99f84899 |
tracing/boot: Add per-group/all events enablement
Add ftrace.event.<GROUP>.enable and ftrace.event.enable boot-time tracing, which enables all events under given GROUP and all events respectivly. Link: https://lkml.kernel.org/r/162264438005.302580.12019174481201855444.stgit@devnote2 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Hyeonggon Yoo
|
6c610dba6e |
tracing: Add WARN_ON_ONCE when returned value is negative
ret is assigned return value of event_hist_trigger_func, but the value is unused. It is better to warn when returned value is negative, rather than just ignoring it. Link: https://lkml.kernel.org/r/20210529061423.GA103954@hyeyoo Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Qiujun Huang
|
099dcc1801 |
tracing: Fix set_named_trigger_data() kernel-doc comment
Fix the description of the parameters. Link: https://lkml.kernel.org/r/20210515105735.52785-1-hqjagain@gmail.com Signed-off-by: Qiujun Huang <hqjagain@gmail.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Colin Ian King
|
08b0c9b4b9 |
tracing: Remove redundant initialization of variable ret
The variable ret is being initialized with a value that is never read, it is being updated later on. The assignment is redundant and can be removed. Link: https://lkml.kernel.org/r/20210513115517.58178-1-colin.king@canonical.com Addresses-Coverity: ("Unused value") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Wei Ming Chen
|
957cdcd9bd |
ring-buffer: Use fallthrough pseudo-keyword
Replace /* fall through */ comment with pseudo-keyword macro fallthrough[1] [1] https://www.kernel.org/doc/html/latest/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Link: https://lkml.kernel.org/r/20210511140246.18868-1-jj251510319013@gmail.com Signed-off-by: Wei Ming Chen <jj251510319013@gmail.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Jiapeng Chong
|
614db49c72 |
tracing: Remove redundant assignment to event_var
Variable event_var is set to 'ERR_PTR(-EINVAL)', but this value is never read as it is overwritten or not used later on, hence it is a redundant assignment and can be removed. Clean up the following clang-analyzer warning: kernel/trace/trace_events_hist.c:2437:21: warning: Value stored to 'event_var' during its initialization is never read [clang-analyzer-deadcode.DeadStores]. Link: https://lkml.kernel.org/r/1620470236-26562-1-git-send-email-jiapeng.chong@linux.alibaba.com Reported-by: Abaci Robot <abaci@linux.alibaba.com> Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Liangyan
|
3e08a9f976 |
tracing: Correct the length check which causes memory corruption
We've suffered from severe kernel crashes due to memory corruption on our production environment, like, Call Trace: [1640542.554277] general protection fault: 0000 [#1] SMP PTI [1640542.554856] CPU: 17 PID: 26996 Comm: python Kdump: loaded Tainted:G [1640542.556629] RIP: 0010:kmem_cache_alloc+0x90/0x190 [1640542.559074] RSP: 0018:ffffb16faa597df8 EFLAGS: 00010286 [1640542.559587] RAX: 0000000000000000 RBX: 0000000000400200 RCX: 0000000006e931bf [1640542.560323] RDX: 0000000006e931be RSI: 0000000000400200 RDI: ffff9a45ff004300 [1640542.560996] RBP: 0000000000400200 R08: 0000000000023420 R09: 0000000000000000 [1640542.561670] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff9a20608d [1640542.562366] R13: ffff9a45ff004300 R14: ffff9a45ff004300 R15: 696c662f65636976 [1640542.563128] FS: 00007f45d7c6f740(0000) GS:ffff9a45ff840000(0000) knlGS:0000000000000000 [1640542.563937] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [1640542.564557] CR2: 00007f45d71311a0 CR3: 000000189d63e004 CR4: 00000000003606e0 [1640542.565279] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [1640542.566069] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [1640542.566742] Call Trace: [1640542.567009] anon_vma_clone+0x5d/0x170 [1640542.567417] __split_vma+0x91/0x1a0 [1640542.567777] do_munmap+0x2c6/0x320 [1640542.568128] vm_munmap+0x54/0x70 [1640542.569990] __x64_sys_munmap+0x22/0x30 [1640542.572005] do_syscall_64+0x5b/0x1b0 [1640542.573724] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [1640542.575642] RIP: 0033:0x7f45d6e61e27 James Wang has reproduced it stably on the latest 4.19 LTS. After some debugging, we finally proved that it's due to ftrace buffer out-of-bound access using a debug tool as follows: [ 86.775200] BUG: Out-of-bounds write at addr 0xffff88aefe8b7000 [ 86.780806] no_context+0xdf/0x3c0 [ 86.784327] __do_page_fault+0x252/0x470 [ 86.788367] do_page_fault+0x32/0x140 [ 86.792145] page_fault+0x1e/0x30 [ 86.795576] strncpy_from_unsafe+0x66/0xb0 [ 86.799789] fetch_memory_string+0x25/0x40 [ 86.804002] fetch_deref_string+0x51/0x60 [ 86.808134] kprobe_trace_func+0x32d/0x3a0 [ 86.812347] kprobe_dispatcher+0x45/0x50 [ 86.816385] kprobe_ftrace_handler+0x90/0xf0 [ 86.820779] ftrace_ops_assist_func+0xa1/0x140 [ 86.825340] 0xffffffffc00750bf [ 86.828603] do_sys_open+0x5/0x1f0 [ 86.832124] do_syscall_64+0x5b/0x1b0 [ 86.835900] entry_SYSCALL_64_after_hwframe+0x44/0xa9 commit |
||
|
Steven Rostedt (VMware)
|
6c14133d2d |
ftrace: Do not blindly read the ip address in ftrace_bug()
It was reported that a bug on arm64 caused a bad ip address to be used for
updating into a nop in ftrace_init(), but the error path (rightfully)
returned -EINVAL and not -EFAULT, as the bug caused more than one error to
occur. But because -EINVAL was returned, the ftrace_bug() tried to report
what was at the location of the ip address, and read it directly. This
caused the machine to panic, as the ip was not pointing to a valid memory
address.
Instead, read the ip address with copy_from_kernel_nofault() to safely
access the memory, and if it faults, report that the address faulted,
otherwise report what was in that location.
Link: https://lore.kernel.org/lkml/20210607032329.28671-1-mark-pk.tsai@mediatek.com/
Cc: stable@vger.kernel.org
Fixes:
|
||
|
Linus Torvalds
|
9d32fa5d74 |
Networking fixes for 5.13-rc5, including fixes from bpf, wireless,
netfilter and wireguard trees.
The bpf vs lockdown+audit fix is the most notable.
Current release - regressions:
- virtio-net: fix page faults and crashes when XDP is enabled
- mlx5e: fix HW timestamping with CQE compression, and make sure they
are only allowed to coexist with capable devices
- stmmac:
- fix kernel panic due to NULL pointer dereference of mdio_bus_data
- fix double clk unprepare when no PHY device is connected
Current release - new code bugs:
- mt76: a few fixes for the recent MT7921 devices and runtime
power management
Previous releases - regressions:
- ice: - track AF_XDP ZC enabled queues in bitmap to fix copy mode Tx
- fix allowing VF to request more/less queues via virtchnl
- correct supported and advertised autoneg by using PHY capabilities
- allow all LLDP packets from PF to Tx
- kbuild: quote OBJCOPY var to avoid a pahole call break the build
Previous releases - always broken:
- bpf, lockdown, audit: fix buggy SELinux lockdown permission checks
- mt76: address the recent FragAttack vulnerabilities not covered
by generic fixes
- ipv6: fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions
- Bluetooth:
- fix the erroneous flush_work() order, to avoid double free
- use correct lock to prevent UAF of hdev object
- nfc: fix NULL ptr dereference in llcp_sock_getname() after failed connect
- ieee802154: multiple fixes to error checking and return values
- igb: fix XDP with PTP enabled
- intel: add correct exception tracing for XDP
- tls: fix use-after-free when TLS offload device goes down and back up
- ipvs: ignore IP_VS_SVC_F_HASHED flag when adding service
- netfilter: nft_ct: skip expectations for confirmed conntrack
- mptcp: fix falling back to TCP in presence of out of order packets
early in connection lifetime
- wireguard: switch from O(n) to a O(1) algorithm for maintaining peers,
fixing stalls and a large memory leak in the process
Misc:
- devlink: correct VIRTUAL port to not have phys_port attributes
- Bluetooth: fix VIRTIO_ID_BT assigned number
- net: return the correct errno code ENOBUF -> ENOMEM
- wireguard:
- peer: allocate in kmem_cache saving 25% on peer memory
- do not use -O3
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----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=sNP5
-----END PGP SIGNATURE-----
Merge tag 'net-5.13-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Networking fixes, including fixes from bpf, wireless, netfilter and
wireguard trees.
The bpf vs lockdown+audit fix is the most notable.
Things haven't slowed down just yet, both in terms of regressions in
current release and largish fixes for older code, but we usually see a
slowdown only after -rc5.
Current release - regressions:
- virtio-net: fix page faults and crashes when XDP is enabled
- mlx5e: fix HW timestamping with CQE compression, and make sure they
are only allowed to coexist with capable devices
- stmmac:
- fix kernel panic due to NULL pointer dereference of
mdio_bus_data
- fix double clk unprepare when no PHY device is connected
Current release - new code bugs:
- mt76: a few fixes for the recent MT7921 devices and runtime power
management
Previous releases - regressions:
- ice:
- track AF_XDP ZC enabled queues in bitmap to fix copy mode Tx
- fix allowing VF to request more/less queues via virtchnl
- correct supported and advertised autoneg by using PHY
capabilities
- allow all LLDP packets from PF to Tx
- kbuild: quote OBJCOPY var to avoid a pahole call break the build
Previous releases - always broken:
- bpf, lockdown, audit: fix buggy SELinux lockdown permission checks
- mt76: address the recent FragAttack vulnerabilities not covered by
generic fixes
- ipv6: fix KASAN: slab-out-of-bounds Read in
fib6_nh_flush_exceptions
- Bluetooth:
- fix the erroneous flush_work() order, to avoid double free
- use correct lock to prevent UAF of hdev object
- nfc: fix NULL ptr dereference in llcp_sock_getname() after failed
connect
- ieee802154: multiple fixes to error checking and return values
- igb: fix XDP with PTP enabled
- intel: add correct exception tracing for XDP
- tls: fix use-after-free when TLS offload device goes down and back
up
- ipvs: ignore IP_VS_SVC_F_HASHED flag when adding service
- netfilter: nft_ct: skip expectations for confirmed conntrack
- mptcp: fix falling back to TCP in presence of out of order packets
early in connection lifetime
- wireguard: switch from O(n) to a O(1) algorithm for maintaining
peers, fixing stalls and a large memory leak in the process
Misc:
- devlink: correct VIRTUAL port to not have phys_port attributes
- Bluetooth: fix VIRTIO_ID_BT assigned number
- net: return the correct errno code ENOBUF -> ENOMEM
- wireguard:
- peer: allocate in kmem_cache saving 25% on peer memory
- do not use -O3"
* tag 'net-5.13-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (91 commits)
cxgb4: avoid link re-train during TC-MQPRIO configuration
sch_htb: fix refcount leak in htb_parent_to_leaf_offload
wireguard: allowedips: free empty intermediate nodes when removing single node
wireguard: allowedips: allocate nodes in kmem_cache
wireguard: allowedips: remove nodes in O(1)
wireguard: allowedips: initialize list head in selftest
wireguard: peer: allocate in kmem_cache
wireguard: use synchronize_net rather than synchronize_rcu
wireguard: do not use -O3
wireguard: selftests: make sure rp_filter is disabled on vethc
wireguard: selftests: remove old conntrack kconfig value
virtchnl: Add missing padding to virtchnl_proto_hdrs
ice: Allow all LLDP packets from PF to Tx
ice: report supported and advertised autoneg using PHY capabilities
ice: handle the VF VSI rebuild failure
ice: Fix VFR issues for AVF drivers that expect ATQLEN cleared
ice: Fix allowing VF to request more/less queues via virtchnl
virtio-net: fix for skb_over_panic inside big mode
ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions
fib: Return the correct errno code
...
|
||
|
Daniel Borkmann
|
ff40e51043 |
bpf, lockdown, audit: Fix buggy SELinux lockdown permission checks
Commit |
||
|
Linus Torvalds
|
9a76c0ee3a |
seccomp fixes for v5.13-rc4
- Fix addfd notification race condition (Sargun Dhillon) -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEpcP2jyKd1g9yPm4TiXL039xtwCYFAmCyhNIACgkQiXL039xt wCbExBAAoniF2+pW8sN32KK6a4uLGJCPCcbwZqWGw2zINqn6+I6KGAld37lGPu3E ASuu28O45NXcP9SpHLxNT1jRhAet57G6OjSV78jEzVII2EogUIBOyRji7yTk8xCt kCp21/9RaQ3DitYe2vh9R2neNIZh/PodmY8V5tkP2HacgaEuf5+yRhB/1QbTm7HG +mMZsejw1eEryJ49cw7XkYpWNjyz5vxwvXWJt6nfgm7wTnNopUQUKJGwnp2bX9cZ LUgstLq0SpHW7uxwEq4NYux3qsD9kaj5SgZxb/6KkHNmg5q6WUXxm0FljipEIhq1 RBTLdH+6Ct+DcDryno2VDoRNP/Q3pim9jxTpfQQ5V6f4dVqNv6pVuR2uNfK/iEX2 mk7Rc99IifaXeOLITKGusZrm16msVg+o7wAu0B1iT0vyacPcwRXJtIWy829Z+gCP r5OsBguxPPTkxfoRWYX4WDNcZmuBC5hkyqzN8toiQjOGghdm9nXdH4jFl8kcqZps I7i0Me3JBWVskx1d8AKlkJv3ctbdUX7QV/HaPdsMLlXTLyqBR76D/uqeUFgmWpUq 2ib3bkJzRNYgm2nron1fmDOLTiJGVfEha5hmbThPrVziYv7+jwamHzPf8jPvB+tg nOpw/HEfoVQtuq/e+Ocdv6TLnZAZWnvxYC/RB3aTBq5xz+74nYA= =c9Hd -----END PGP SIGNATURE----- Merge tag 'seccomp-fixes-v5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull seccomp fixes from Kees Cook: "This fixes a hard-to-hit race condition in the addfd user_notif feature of seccomp, visible since v5.9. And a small documentation fix" * tag 'seccomp-fixes-v5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: seccomp: Refactor notification handler to prepare for new semantics Documentation: seccomp: Fix user notification documentation |
||
|
Sargun Dhillon
|
ddc4739169 |
seccomp: Refactor notification handler to prepare for new semantics
This refactors the user notification code to have a do / while loop around
the completion condition. This has a small change in semantic, in that
previously we ignored addfd calls upon wakeup if the notification had been
responded to, but instead with the new change we check for an outstanding
addfd calls prior to returning to userspace.
Rodrigo Campos also identified a bug that can result in addfd causing
an early return, when the supervisor didn't actually handle the
syscall [1].
[1]: https://lore.kernel.org/lkml/20210413160151.3301-1-rodrigo@kinvolk.io/
Fixes:
|
||
|
Linus Torvalds
|
d7c5303fbc |
Networking fixes for 5.13-rc4, including fixes from bpf, netfilter,
can and wireless trees. Notably including fixes for the recently
announced "FragAttacks" WiFi vulnerabilities. Rather large batch,
touching some core parts of the stack, too, but nothing hair-raising.
Current release - regressions:
- tipc: make node link identity publish thread safe
- dsa: felix: re-enable TAS guard band mode
- stmmac: correct clocks enabled in stmmac_vlan_rx_kill_vid()
- stmmac: fix system hang if change mac address after interface ifdown
Current release - new code bugs:
- mptcp: avoid OOB access in setsockopt()
- bpf: Fix nested bpf_bprintf_prepare with more per-cpu buffers
- ethtool: stats: fix a copy-paste error - init correct array size
Previous releases - regressions:
- sched: fix packet stuck problem for lockless qdisc
- net: really orphan skbs tied to closing sk
- mlx4: fix EEPROM dump support
- bpf: fix alu32 const subreg bound tracking on bitwise operations
- bpf: fix mask direction swap upon off reg sign change
- bpf, offload: reorder offload callback 'prepare' in verifier
- stmmac: Fix MAC WoL not working if PHY does not support WoL
- packetmmap: fix only tx timestamp on request
- tipc: skb_linearize the head skb when reassembling msgs
Previous releases - always broken:
- mac80211: address recent "FragAttacks" vulnerabilities
- mac80211: do not accept/forward invalid EAPOL frames
- mptcp: avoid potential error message floods
- bpf, ringbuf: deny reserve of buffers larger than ringbuf to prevent
out of buffer writes
- bpf: forbid trampoline attach for functions with variable arguments
- bpf: add deny list of functions to prevent inf recursion of tracing
programs
- tls splice: check SPLICE_F_NONBLOCK instead of MSG_DONTWAIT
- can: isotp: prevent race between isotp_bind() and isotp_setsockopt()
- netfilter: nft_set_pipapo_avx2: Add irq_fpu_usable() check,
fallback to non-AVX2 version
Misc:
- bpf: add kconfig knob for disabling unpriv bpf by default
-----BEGIN PGP SIGNATURE-----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=peMK
-----END PGP SIGNATURE-----
Merge tag 'net-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Networking fixes for 5.13-rc4, including fixes from bpf, netfilter,
can and wireless trees. Notably including fixes for the recently
announced "FragAttacks" WiFi vulnerabilities. Rather large batch,
touching some core parts of the stack, too, but nothing hair-raising.
Current release - regressions:
- tipc: make node link identity publish thread safe
- dsa: felix: re-enable TAS guard band mode
- stmmac: correct clocks enabled in stmmac_vlan_rx_kill_vid()
- stmmac: fix system hang if change mac address after interface
ifdown
Current release - new code bugs:
- mptcp: avoid OOB access in setsockopt()
- bpf: Fix nested bpf_bprintf_prepare with more per-cpu buffers
- ethtool: stats: fix a copy-paste error - init correct array size
Previous releases - regressions:
- sched: fix packet stuck problem for lockless qdisc
- net: really orphan skbs tied to closing sk
- mlx4: fix EEPROM dump support
- bpf: fix alu32 const subreg bound tracking on bitwise operations
- bpf: fix mask direction swap upon off reg sign change
- bpf, offload: reorder offload callback 'prepare' in verifier
- stmmac: Fix MAC WoL not working if PHY does not support WoL
- packetmmap: fix only tx timestamp on request
- tipc: skb_linearize the head skb when reassembling msgs
Previous releases - always broken:
- mac80211: address recent "FragAttacks" vulnerabilities
- mac80211: do not accept/forward invalid EAPOL frames
- mptcp: avoid potential error message floods
- bpf, ringbuf: deny reserve of buffers larger than ringbuf to
prevent out of buffer writes
- bpf: forbid trampoline attach for functions with variable arguments
- bpf: add deny list of functions to prevent inf recursion of tracing
programs
- tls splice: check SPLICE_F_NONBLOCK instead of MSG_DONTWAIT
- can: isotp: prevent race between isotp_bind() and
isotp_setsockopt()
- netfilter: nft_set_pipapo_avx2: Add irq_fpu_usable() check,
fallback to non-AVX2 version
Misc:
- bpf: add kconfig knob for disabling unpriv bpf by default"
* tag 'net-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (172 commits)
net: phy: Document phydev::dev_flags bits allocation
mptcp: validate 'id' when stopping the ADD_ADDR retransmit timer
mptcp: avoid error message on infinite mapping
mptcp: drop unconditional pr_warn on bad opt
mptcp: avoid OOB access in setsockopt()
nfp: update maintainer and mailing list addresses
net: mvpp2: add buffer header handling in RX
bnx2x: Fix missing error code in bnx2x_iov_init_one()
net: zero-initialize tc skb extension on allocation
net: hns: Fix kernel-doc
sctp: fix the proc_handler for sysctl encap_port
sctp: add the missing setting for asoc encap_port
bpf, selftests: Adjust few selftest result_unpriv outcomes
bpf: No need to simulate speculative domain for immediates
bpf: Fix mask direction swap upon off reg sign change
bpf: Wrap aux data inside bpf_sanitize_info container
bpf: Fix BPF_LSM kconfig symbol dependency
selftests/bpf: Add test for l3 use of bpf_redirect_peer
bpftool: Add sock_release help info for cgroup attach/prog load command
net: dsa: microchip: enable phy errata workaround on 9567
...
|
||
|
Daniel Borkmann
|
a703619127 |
bpf: No need to simulate speculative domain for immediates
In
|
||
|
Daniel Borkmann
|
bb01a1bba5 |
bpf: Fix mask direction swap upon off reg sign change
Masking direction as indicated via mask_to_left is considered to be
calculated once and then used to derive pointer limits. Thus, this
needs to be placed into bpf_sanitize_info instead so we can pass it
to sanitize_ptr_alu() call after the pointer move. Piotr noticed a
corner case where the off reg causes masking direction change which
then results in an incorrect final aux->alu_limit.
Fixes:
|
||
|
Daniel Borkmann
|
3d0220f686 |
bpf: Wrap aux data inside bpf_sanitize_info container
Add a container structure struct bpf_sanitize_info which holds the current aux info, and update call-sites to sanitize_ptr_alu() to pass it in. This is needed for passing in additional state later on. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Piotr Krysiuk <piotras@gmail.com> Acked-by: Alexei Starovoitov <ast@kernel.org> |
||
|
Daniel Borkmann
|
5c9d706f61 |
bpf: Fix BPF_LSM kconfig symbol dependency
Similarly as |
||
|
Linus Torvalds
|
1434a31278 |
Merge branch 'for-5.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fixes from Tejun Heo: - "cgroup_disable=" boot param was being applied too late confusing some subsystems. Fix it by moving application to __setup() time. - Comment spelling fixes. Included here to lower the chance of trivial future merge conflicts. * 'for-5.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cgroup: fix spelling mistakes cgroup: disable controllers at parse time |
||
|
Linus Torvalds
|
5df7ae7bed |
Merge branch 'for-5.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull workqueue fix from Tejun Heo: "One commit to fix spurious workqueue stall warnings across VM suspensions" * 'for-5.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: wq: handle VM suspension in stall detection |
||
|
Zhen Lei
|
08b2b6fdf6 |
cgroup: fix spelling mistakes
Fix some spelling mistakes in comments: hierarhcy ==> hierarchy automtically ==> automatically overriden ==> overridden In absense of .. or ==> In absence of .. and assocaited ==> associated taget ==> target initate ==> initiate succeded ==> succeeded curremt ==> current udpated ==> updated Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Signed-off-by: Tejun Heo <tj@kernel.org> |
||
|
Linus Torvalds
|
0898678c74 |
Two locking fixes:
- Invoke the lockdep tracepoints in the correct place so the ordering
is correct again.
- Don't leave the mutex WAITER bit stale when the last waiter is dropping
out early due to a signal as that forces all subsequent lock operations
needlessly into the slowpath until it's cleaned up again.
-----BEGIN PGP SIGNATURE-----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=7vqW
-----END PGP SIGNATURE-----
Merge tag 'locking-urgent-2021-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixes from Thomas Gleixner:
"Two locking fixes:
- Invoke the lockdep tracepoints in the correct place so the ordering
is correct again
- Don't leave the mutex WAITER bit stale when the last waiter is
dropping out early due to a signal as that forces all subsequent
lock operations needlessly into the slowpath until it's cleaned up
again"
* tag 'locking-urgent-2021-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/mutex: clear MUTEX_FLAGS if wait_list is empty due to signal
locking/lockdep: Correct calling tracepoints
|
||
|
Petr Mladek
|
0f90b88dbc |
watchdog: reliable handling of timestamps
Commit |
||
|
Linus Torvalds
|
a0e31f3a38 |
Merge branch 'for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull siginfo fix from Eric Biederman:
"During the merge window an issue with si_perf and the siginfo ABI came
up. The alpha and sparc siginfo structure layout had changed with the
addition of SIGTRAP TRAP_PERF and the new field si_perf.
The reason only alpha and sparc were affected is that they are the
only architectures that use si_trapno.
Looking deeper it was discovered that si_trapno is used for only a few
select signals on alpha and sparc, and that none of the other
_sigfault fields past si_addr are used at all. Which means technically
no regression on alpha and sparc.
While the alignment concerns might be dismissed the abuse of si_errno
by SIGTRAP TRAP_PERF does have the potential to cause regressions in
existing userspace.
While we still have time before userspace starts using and depending
on the new definition siginfo for SIGTRAP TRAP_PERF this set of
changes cleans up siginfo_t.
- The si_trapno field is demoted from magic alpha and sparc status
and made an ordinary union member of the _sigfault member of
siginfo_t. Without moving it of course.
- si_perf is replaced with si_perf_data and si_perf_type ending the
abuse of si_errno.
- Unnecessary additions to signalfd_siginfo are removed"
* 'for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
signalfd: Remove SIL_PERF_EVENT fields from signalfd_siginfo
signal: Deliver all of the siginfo perf data in _perf
signal: Factor force_sig_perf out of perf_sigtrap
signal: Implement SIL_FAULT_TRAPNO
siginfo: Move si_trapno inside the union inside _si_fault
|
||
|
Linus Torvalds
|
c1f47ebc9b |
Modules fixes for v5.13-rc3
- When CONFIG_MODULE_UNLOAD=n, module exit sections get sorted into the init region of the module in order to satisfy the requirements of jump_labels and static_calls. Previously, the exit section check was done in module_init_section(), but the solution there is not completely arch-indepedent as ARM is a special case and supplies its own module_init_section() function. Instead of pushing this logic further to the arch-specific code, switch to an arch-independent solution to check for module exit sections in the core module loader code in layout_sections() instead. Signed-off-by: Jessica Yu <jeyu@kernel.org> -----BEGIN PGP SIGNATURE----- iQJEBAABCAAuFiEEVrp26glSWYuDNrCUwEV+OM47wXIFAmCndboQHGpleXVAa2Vy bmVsLm9yZwAKCRDARX44zjvBcqzYD/9+W1lTEMXwEpayn71iMNs3ECMBY4ZaKbEd bxH1oLDADnIunS00tHBn4LO/t1tK18en/du9NtXfH1rmmH7jp9qDqJPxZbAOg6+i g8UxDAj1D+o6X5WfaVx8ygJ5JFTo927yk8rzQz4nqy8D7ZT87x4BvRaZF199jRMk MBQWDh9AfOC5DehauMKu4CjeEEWebPjG9QUQlg9ngQMrsGtGdOHv1Ex8zH66Oi4X xxOVqmRQu3yLMGfv03znHKvRSVXAponCZVT1VOiHBK9T1CaEgdP3eBE4mlTTAcLh X913OV69dQeNzoDFsECZfE4fmypym5CnvloCEg8Kx4zi5GN6TBO3RSU3EyRQChva 7RgNFZsS43Q9d3Q3ZfL5HX9Db/kd4oex3tA3mvuAh4CkA9400x2H4FeHsfMrOfJB avxvgQhUUnfphQ0chIDHVtWfSAIWcLlNkl6VEx6MB5A/m4qJUz6VyZafoC2khE52 98NzXNdmmRuuI+hrUqVsUsDH3ZybbAf362OqiImiRFjlVfbnZzUnSsVS3j4+Ckj8 VWBy4fMivpBu5CT2P4CVhJAA2VfgzVJpZ7HrjSP4uSI1xcJxxsXb8hWbQ10NSynq tr3Q6gvWQN+/I4RLAv4XlXkvXPfIDN10DavhmY6ZBTuUTuRcTyP6Sd1TYvwUzMJi iGMTFFrXcg== =uBiQ -----END PGP SIGNATURE----- Merge tag 'modules-for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux Pull module fix from Jessica Yu: "When CONFIG_MODULE_UNLOAD=n, module exit sections get sorted into the init region of the module in order to satisfy the requirements of jump_labels and static_calls. Previously, the exit section check was done in module_init_section(), but the solution there is not completely arch-indepedent as ARM is a special case and supplies its own module_init_section() function. Instead of pushing this logic further to the arch-specific code, switch to an arch-independent solution to check for module exit sections in the core module loader code in layout_sections() instead" * tag 'modules-for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux: module: check for exit sections in layout_sections() instead of module_init_section() |
||
|
Linus Torvalds
|
921dd23597 |
Merge branch 'urgent.2021.05.20a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull kcsan fix from Paul McKenney:
"Fix for a regression introduced in this merge window by commit
|
||
|
Yinjun Zhang
|
ceb11679d9 |
bpf, offload: Reorder offload callback 'prepare' in verifier
Commit |
||
|
Florent Revest
|
0af02eb2a7 |
bpf: Avoid using ARRAY_SIZE on an uninitialized pointer
The cppcheck static code analysis reported the following error:
if (WARN_ON_ONCE(nest_level > ARRAY_SIZE(bufs->tmp_bufs))) {
^
ARRAY_SIZE is a macro that expands to sizeofs, so bufs is not actually
dereferenced at runtime, and the code is actually safe. But to keep
things tidy, this patch removes the need for a call to ARRAY_SIZE by
extracting the size of the array into a macro. Cppcheck should no longer
be confused and the code ends up being a bit cleaner.
Fixes:
|
||
|
Florent Revest
|
8afcc19fbf |
bpf: Clarify a bpf_bprintf_prepare macro
The per-cpu buffers contain bprintf data rather than printf arguments. The macro name and comment were a bit confusing, this rewords them in a clearer way. Signed-off-by: Florent Revest <revest@chromium.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <song@kernel.org> Link: https://lore.kernel.org/bpf/20210517092830.1026418-1-revest@chromium.org |