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linux/arch/s390/kernel
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Mikhail Zaslonko 0945285e6c s390/debug: Fix race between debug area resize and event logging 
Trace functions check for non-NULL id->areas without lock to minimize
overhead. This opens a race window where a NULL pointer dereference
occurs if id->areas is set to NULL (e.g. via echo 0 > ../pages) after
the check and before id->lock is taken.

Fix this by rechecking id->areas under lock.

Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2026-09-08 15:53:40 +02:00
..
diag s390/diag324: Preserve -EBUSY return code 2026-08-31 16:25:39 +02:00
syscalls arch: hookup fchroot() system call 2026-07-27 17:18:00 +02:00
vdso s390 updates for 7.3 merge window 2026-08-23 10:26:44 -07:00
.gitignore
abs_lowcore.c s390/lowcore: Convert relocated lowcore alternative to machine feature 2025-03-04 17:18:05 +01:00
alternative.c kernel.h: drop hex.h and update all hex.h users 2026-01-20 19:44:19 -08:00
asm-offsets.c s390/idle: Provide arch specific kcpustat_field_idle()/kcpustat_field_iowait() 2026-06-15 16:33:40 +02:00
audit.c s390: Remove compat support 2025-11-17 11:10:38 +01:00
bpf.c s390: Introduce bpf_get_lowcore() kfunc 2026-03-03 08:35:07 -08:00
cache.c s390/cache: prevent rebuild of shared_cpu_list 2024-03-07 14:41:15 +01:00
cert_store.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
cpacf.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
cpcmd.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
cpufeature.c s390: Explicitly include <linux/export.h> 2025-06-17 18:18:02 +02:00
crash_dump.c s390: Explicitly include <linux/export.h> 2025-06-17 18:18:02 +02:00
ctlreg.c s390: Explicitly include <linux/export.h> 2025-06-17 18:18:02 +02:00
debug.c s390/debug: Fix race between debug area resize and event logging 2026-09-08 15:53:40 +02:00
dis.c s390/fault: Print unmodified PSW address on protection exception 2025-11-14 11:34:28 +01:00
dumpstack.c s390/fault: Print unmodified PSW address on protection exception 2025-11-14 11:34:28 +01:00
early_printk.c s390/early: Dump register contents and call trace for early crashes 2024-08-22 19:28:11 +02:00
early.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
ebcdic.c
entry.h s390/syscalls: Use define instead of '1' to indicate PER trap 2026-07-30 00:29:08 +02:00
entry.S s390/syscalls: Use define instead of '1' to indicate PER trap 2026-07-30 00:29:08 +02:00
facility.c s390: Explicitly include <linux/export.h> 2025-06-17 18:18:02 +02:00
fpu.c s390: Explicitly include <linux/export.h> 2025-06-17 18:18:02 +02:00
ftrace.c s390 updates for 6.15 merge window 2025-03-29 11:59:43 -07:00
ftrace.h s390/ftrace: Remove unused ftrace_plt_template* 2024-08-27 20:16:48 +02:00
guarded_storage.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
head.S s390: Rename head64.S to head.S 2025-11-25 15:28:07 +01:00
hiperdispatch.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
idle.c s390/tick: Remove CIF_NOHZ_DELAY flag 2026-07-08 17:03:28 +02:00
ipl_vmparm.c
ipl.c s390/ipl: Fix NULL deref in dump_reipl without re-IPL parm block 2026-08-31 16:25:38 +02:00
irq.c s390/tick: Remove CIF_NOHZ_DELAY flag 2026-07-08 17:03:28 +02:00
irqflags.c s390/irqflags: Add out-of-line definitions of arch_local_irq_*() for KMSAN 2026-08-11 16:42:18 +02:00
jump_label.c
kdebugfs.c
kexec_elf.c s390: kexec: initialize kexec_buf struct 2025-09-03 17:10:37 -07:00
kexec_image.c s390: kexec: initialize kexec_buf struct 2025-09-03 17:10:37 -07:00
kprobes.c s390/cpufeature: Convert MACHINE_HAS_SEQ_INSN to cpu_has_seq_insn() 2025-03-04 17:18:04 +01:00
lgr.c s390: kernel: convert timeouts to use secs_to_jiffies() 2025-01-12 20:21:01 -08:00
machine_kexec_file.c module: Give MODULE_SIG_STRING a more descriptive name 2026-03-24 21:42:37 +00:00
machine_kexec_reloc.c
machine_kexec.c s390: Convert MACHINE_IS_[LPAR|VM|KVM], etc, machine_is_[lpar|vm|kvm]() 2025-03-04 17:18:07 +01:00
Makefile s390: Enable CONTEXT_ANALYSIS for various directories 2026-08-11 16:42:18 +02:00
mcount.S s390: Add ftrace_stub_graph 2026-08-05 15:16:54 +02:00
module.c s390: Add stackprotector support 2025-11-24 11:45:21 +01:00
nmi.c KVM: s390: Fix memory corruption by not reinjecting CK machine checks 2026-08-11 10:45:56 +02:00
nospec-branch.c s390/nospec: Push down alternative handling 2024-07-23 16:02:31 +02:00
nospec-sysfs.c s390/nospec: Switch over to sysfs_emit() 2024-10-25 16:03:24 +02:00
numa.c mm/memblock: add memblock_alloc_or_panic interface 2025-01-25 20:22:38 -08:00
os_info.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
perf_cpum_cf_events.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
perf_cpum_cf.c s390 updates for 7.3 merge window 2026-08-23 10:26:44 -07:00
perf_cpum_sf.c s390/cpum_sf: Cap sampling rate to prevent lsctl exception 2026-03-24 20:57:31 +01:00
perf_event.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
perf_pai.c s390/pai: Support CPU hotplug for PMU PAI 2026-09-08 15:53:40 +02:00
perf_regs.c s390: Remove compat support 2025-11-17 11:10:38 +01:00
process.c s390/process: Fix kernel thread function pointer type 2026-06-11 17:45:35 +02:00
processor.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
ptrace.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
reipl.S s390/kdump: Make kdump ready for lowcore relocation 2024-07-23 16:02:32 +02:00
relocate_kernel.S
rethook.c
rethook.h
runtime_instr.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
setup.c mm, arch: consolidate hugetlb CMA reservation 2026-01-26 20:02:19 -08:00
signal.c s390/vdso: Rename vdso64 to vdso 2025-11-25 15:28:07 +01:00
skey.c s390: Remove superfluous newlines from inline assemblies 2025-09-29 13:52:08 +02:00
smp.c s390/topology: Switch to common cpu capacity code 2026-08-31 16:25:39 +02:00
stackprotector.c kernel.h: drop hex.h and update all hex.h users 2026-01-20 19:44:19 -08:00
stacktrace.c s390/stacktrace: Do not fallback to RA register 2025-12-14 11:03:58 +01:00
sthyi.c s390: Fix double word in comments 2025-11-06 14:17:27 +01:00
syscall.c s390 updates for 7.3 merge window 2026-08-23 10:26:44 -07:00
sysinfo.c s390/sysinfo: Add context analysis attributes 2026-08-11 16:42:18 +02:00
text_amode31.S s390/diag: Generate CFI type information for assembly functions 2026-08-05 15:16:54 +02:00
time.c s390/ptff: Export ptff_function_mask[] 2026-07-23 07:02:34 -07:00
topology.c s390/topology: Switch to common cpu capacity code 2026-08-31 16:25:39 +02:00
trace_clock.c s390/tracing: Add s390-tod clock 2026-05-26 08:15:41 +02:00
trace.c
traps.c s390/traps: Remove PIF_GUEST_FAULT 2026-07-30 00:29:08 +02:00
unwind_bc.c s390: Explicitly include <linux/export.h> 2025-06-17 18:18:02 +02:00
uprobes.c s390: Remove compat support 2025-11-17 11:10:38 +01:00
uv.c KVM: s390: Remove cond_resched() calls 2026-08-05 15:16:54 +02:00
vdso.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
vmcore_info.c s390: Remove __bootdata annotations from declarations 2024-12-15 16:19:04 +01:00
vmlinux.lds.S s390/debug: Add s390dbf kernel parameter 2026-05-11 16:42:31 +02:00
vtime.c s390/time: Use jiffies instead of jiffies_64 2026-08-31 16:25:37 +02:00
wti.c s390/wti: Add debugfs file to display missed grace periods per cpu 2024-08-29 22:56:35 +02:00