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| author | Andy Lutomirski <luto@kernel.org> | 2016-07-14 13:22:55 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-07-15 10:26:28 +0200 |
| commit | 2deb4be28077638591fe5fc593b7f8aabc140f42 (patch) | |
| tree | 3c06fe6e99676de863c22112927b70c6fd99acc4 /arch/x86/include/asm/thread_info.h | |
| parent | 46aea3873401836abb7f01200e7946e7d518b359 (diff) | |
| download | blackbird-obmc-linux-2deb4be28077638591fe5fc593b7f8aabc140f42.tar.gz blackbird-obmc-linux-2deb4be28077638591fe5fc593b7f8aabc140f42.zip | |
x86/dumpstack: When OOPSing, rewind the stack before do_exit()
If we call do_exit() with a clean stack, we greatly reduce the risk of
recursive oopses due to stack overflow in do_exit, and we allow
do_exit to work even if we OOPS from an IST stack. The latter gives
us a much better chance of surviving long enough after we detect a
stack overflow to write out our logs.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/32f73ceb372ec61889598da5e5b145889b9f2e19.1468527351.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/thread_info.h')
0 files changed, 0 insertions, 0 deletions
