diff options
| author | Kees Cook <keescook@chromium.org> | 2013-09-11 21:25:49 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-11 22:59:30 (GMT) |
| commit | 6723734cdff15211bb78aeea76ca847374bd93ae (patch) | |
| tree | 0c28ac52a1473dbbbeb32dfc893ebe285cc989bc | |
| parent | 6325932666540beea18c800016368dc921068611 (diff) | |
| download | linux-6723734cdff15211bb78aeea76ca847374bd93ae.tar.xz | |
panic: call panic handlers before kmsg_dump
Since the panic handlers may produce additional information (via printk)
for the kernel log, it should be reported as part of the panic output
saved by kmsg_dump(). Without this re-ordering, nothing that adds
information to a panic will show up in pstore's view when kmsg_dump runs,
and is therefore not visible to crash reporting tools that examine pstore
output.
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Anton Vorontsov <anton@enomsg.org>
Cc: Colin Cross <ccross@android.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Vikram Mulukutla <markivx@codeaurora.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | kernel/panic.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/panic.c b/kernel/panic.c index 8018646..b6c482c 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -123,10 +123,14 @@ void panic(const char *fmt, ...) */ smp_send_stop(); - kmsg_dump(KMSG_DUMP_PANIC); - + /* + * Run any panic handlers, including those that might need to + * add information to the kmsg dump output. + */ atomic_notifier_call_chain(&panic_notifier_list, 0, buf); + kmsg_dump(KMSG_DUMP_PANIC); + bust_spinlocks(0); if (!panic_blink) |