]> git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/commit
x86/dumpstack: Try harder to get a call trace on stack overflow
authorAndy Lutomirski <luto@kernel.org>
Thu, 14 Jul 2016 20:22:52 +0000 (13:22 -0700)
committerIngo Molnar <mingo@kernel.org>
Fri, 15 Jul 2016 08:26:26 +0000 (10:26 +0200)
commit9a2e9da3e003112399f2863b7b6b911043c01895
tree3de10e8eaabd99a08d0c2a10076fc9a455df9661
parentd92fc69ccac4c0a20679fdbdc81b2010685a6f33
x86/dumpstack: Try harder to get a call trace on stack overflow

If we overflow the stack, print_context_stack() will abort.  Detect
this case and rewind back into the valid part of the stack so that
we can trace it.

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/ee1690eb2715ccc5dc187fde94effa4ca0ccbbcd.1468527351.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/kernel/dumpstack.c