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linux/arch/s390/kernel
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Sven Schnelle 9b7089ce09 s390/stp: add locking to sysfs functions 
commit b3bd02495c upstream.

The sysfs function might race with stp_work_fn. To prevent that,
add the required locking. Another issue is that the sysfs functions
are checking the stp_online flag, but this flag just holds the user
setting whether STP is enabled. Add a flag to clock_sync_flag whether
stp_info holds valid data and use that instead.

Cc: stable@vger.kernel.org
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-05 11:08:51 +01:00
..
syscalls kbuild: do not redirect the first prerequisite for filechk 2018-07-28 10:34:10 +09:00
vdso32 s390/kasan: avoid vdso instrumentation 2019-11-24 08:20:43 +01:00
vdso64 s390/vdso: fix vDSO clock_getres() 2020-06-30 23:17:14 -04:00
.gitignore s390: add various .gitignore files. 2012-05-16 14:42:41 +02:00
alternative.c s390: add automatic detection of the spectre defense 2018-03-28 08:38:24 +02:00
asm-offsets.c s390/vdso: fix vDSO clock_getres() 2020-06-30 23:17:14 -04:00
audit.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
audit.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
base.S s390/kernel: use expoline for indirect branches 2018-05-07 21:12:39 +02:00
cache.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
compat_audit.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
compat_linux.c mm: add ksys_readahead() helper; remove in-kernel calls to sys_readahead() 2018-04-02 20:16:12 +02:00
compat_linux.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
compat_ptrace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
compat_signal.c s390/compat: fix setup_frame32 2018-04-10 07:38:54 +02:00
compat_wrapper.c s390: wire up rseq system call 2018-07-04 08:35:18 +02:00
cpcmd.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
crash_dump.c s390/kdump: Remove kzalloc_panic 2018-08-16 14:49:15 +02:00
debug.c s390/debug: avoid kernel warning on too large number of pages 2020-07-09 09:37:09 +02:00
diag.c s390/ftrace: fix potential crashes when switching tracers 2020-05-10 10:30:09 +02:00
dis.c s390/disassembler: don't hide instruction addresses 2019-12-31 16:36:00 +01:00
dumpstack.c s390: kernel: add SPDX identifiers to the remaining files 2017-11-24 15:37:12 +01:00
early_nobss.c s390/early: move functions which may not access bss section to extra file 2018-05-09 10:55:01 +02:00
early_printk.c s390/hibernate: fix error handling when suspend cpu != resume cpu 2018-09-20 13:20:23 +02:00
early.c s390/kasan: fix early pgm check handler execution 2020-07-16 08:17:22 +02:00
ebcdic.c s390: ebcdic: convert comments to UTF-8 2018-08-23 18:48:43 -07:00
entry.h s390/boot: make head.S and als.c be part of the decompressor only 2018-06-25 10:14:38 +02:00
entry.S s390: wire up rseq system call 2018-07-04 08:35:18 +02:00
fpu.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ftrace.c s390/function_graph: Simplify with function_graph_enter() 2018-12-05 19:32:10 +01:00
guarded_storage.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2017-11-13 11:47:01 -08:00
head64.S s390: correct _stext offset 2018-07-02 11:24:59 +02:00
idle.c s390/idle: fix cpu idle time calculation 2019-11-06 13:06:20 +01:00
ipl.c s390/ipl: remove reipl_method and dump_method 2018-04-10 07:39:00 +02:00
irq.c s390: remove indirect branch from do_softirq_own_stack 2018-05-07 21:12:42 +02:00
jump_label.c jump_label: move 'asm goto' support test to Kconfig 2019-06-04 08:02:34 +02:00
kdebugfs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
kexec_elf.c s390/kexec_file: Fix potential segment overlap in ELF loader 2020-01-27 14:50:42 +01:00
kexec_image.c s390/kexec_file: Add crash support to image loader 2018-04-16 09:10:22 +02:00
kprobes.c bpf/error-inject/kprobes: Clear current_kprobe and enable preempt in kprobe 2018-06-21 12:33:19 +02:00
lgr.c s390: kernel: add SPDX identifiers to the remaining files 2017-11-24 15:37:12 +01:00
machine_kexec_file.c s390/kexec_file: Add ELF loader 2018-04-16 09:10:23 +02:00
machine_kexec.c s390/ipl: correct kdump reipl block checksum calculation 2018-04-10 07:39:00 +02:00
Makefile s390/kasan: avoid instrumentation of early C code 2019-11-24 08:20:44 +01:00
mcount.S s390/ftrace: save traced function caller 2020-06-07 13:17:55 +02:00
module.c treewide: Use array_size() in vmalloc() 2018-06-12 16:19:22 -07:00
nmi.c headers: untangle kmemleak.h from mm.h 2018-04-05 21:36:27 -07:00
nospec-branch.c s390/speculation: Support 'mitigations=' cmdline option 2019-05-14 19:17:59 +02:00
nospec-sysfs.c s390: detect etoken facility 2018-07-18 08:32:17 +02:00
os_info.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf_cpum_cf_events.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
perf_cpum_cf.c s390/cpum_cf: Reject request for sampling in event initialization 2018-12-17 09:24:32 +01:00
perf_cpum_sf.c s390/cpum_sf: Use kzalloc and minor changes 2020-10-01 13:14:30 +02:00
perf_event.c s390: kernel: Remove redundant license text 2017-11-24 15:37:20 +01:00
perf_regs.c s390/perf: fix gcc 8 array-bounds warning 2018-07-02 11:24:54 +02:00
pgm_check.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
process.c s390/process: avoid potential reading of freed stack 2019-10-11 18:20:41 +02:00
processor.c s390/cpuinfo: fix wrong output when CPU0 is offline 2020-04-23 10:30:18 +02:00
ptrace.c s390/ptrace: fix storage key handling 2020-08-26 10:31:03 +02:00
reipl.S s390/kernel: use expoline for indirect branches 2018-05-07 21:12:39 +02:00
relocate_kernel.S s390: assume diag308 set always works 2018-04-10 07:38:59 +02:00
runtime_instr.c s390/runtime_instrumentation: fix storage key handling 2020-08-26 10:31:03 +02:00
setup.c s390/init: add missing __init annotations 2020-10-01 13:14:50 +02:00
signal.c s390: wire up rseq system call 2018-07-04 08:35:18 +02:00
smp.c s390/ftrace: fix potential crashes when switching tracers 2020-05-10 10:30:09 +02:00
stacktrace.c s390: kernel: add SPDX identifiers to the remaining files 2017-11-24 15:37:12 +01:00
sthyi.c s390/sthyi: Fix machine name validity indication 2018-11-13 11:08:21 -08:00
suspend.c s390: unify linker symbols usage 2018-02-27 08:05:23 +01:00
swsusp.S s390/hibernate: fix error handling when suspend cpu != resume cpu 2018-09-20 13:20:23 +02:00
sys_s390.c mm: add ksys_mmap_pgoff() helper; remove in-kernel calls to sys_mmap_pgoff() 2018-04-02 20:16:11 +02:00
sysinfo.c s390/sysinfo: add missing #ifdef CONFIG_PROC_FS 2018-07-02 12:32:20 +02:00
time.c s390/stp: add locking to sysfs functions 2020-11-05 11:08:51 +01:00
topology.c s390/topology: avoid firing events before kobjs are created 2019-10-11 18:20:42 +02:00
trace.c s390/ftrace: fix potential crashes when switching tracers 2020-05-10 10:30:09 +02:00
traps.c signal/s390: Use force_sig_fault where appropriate 2018-04-25 10:44:08 -05:00
uprobes.c s390/uprobes: implement arch_uretprobe_is_alive() 2018-04-23 07:57:16 +02:00
vdso.c s390/vdso: correct vdso mapping for compat tasks 2019-11-20 18:47:53 +01:00
vmlinux.lds.S s390: put _stext and _etext into .text section 2019-08-29 08:28:41 +02:00
vtime.c s390: kernel: add SPDX identifiers to the remaining files 2017-11-24 15:37:12 +01:00