diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2020-03-13 13:49:51 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-06-11 15:14:36 +0200 |
| commit | 5916d5f9b3347344a3d96ba6b54cf8e290eba96a (patch) | |
| tree | 371d7a89374c7fc5f74b22b5a8210b71a76f44c6 /kernel/panic.c | |
| parent | 126f21f0e8d46e2c0e9daafb67546dbfb316d325 (diff) | |
| download | lwn-5916d5f9b3347344a3d96ba6b54cf8e290eba96a.tar.gz lwn-5916d5f9b3347344a3d96ba6b54cf8e290eba96a.zip | |
bug: Annotate WARN/BUG/stackfail as noinstr safe
Warnings, bugs and stack protection fails from noinstr sections, e.g. low
level and early entry code, are likely to be fatal.
Mark them as "safe" to be invoked from noinstr protected code to avoid
annotating all usage sites. Getting the information out is important.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200505134100.376598577@linutronix.de
Diffstat (limited to 'kernel/panic.c')
| -rw-r--r-- | kernel/panic.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/panic.c b/kernel/panic.c index 85568bbfb12b..e2157ca387c8 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -680,10 +680,12 @@ device_initcall(register_warn_debugfs); * Called when gcc's -fstack-protector feature is used, and * gcc detects corruption of the on-stack canary value */ -__visible void __stack_chk_fail(void) +__visible noinstr void __stack_chk_fail(void) { + instrumentation_begin(); panic("stack-protector: Kernel stack is corrupted in: %pB", __builtin_return_address(0)); + instrumentation_end(); } EXPORT_SYMBOL(__stack_chk_fail); |