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| author | Linus Torvalds <torvalds@woody.osdl.org> | 2006-11-17 20:14:56 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-11-17 20:14:56 +0100 |
| commit | 808dbbb6bb61173bf52946a28f99089d2efa4c55 (patch) | |
| tree | 4d221ed1e66ea09d244b248bb27998ac2efda119 /init | |
| parent | [PATCH] lockdep: fix static keys in module-allocated percpu areas (diff) | |
| download | linux-808dbbb6bb61173bf52946a28f99089d2efa4c55.tar.xz linux-808dbbb6bb61173bf52946a28f99089d2efa4c55.zip | |
x86: be more careful when walking back the frame pointer chain
When showing the stack backtrace, make sure that we never accept not
only an unchanging frame pointer, but also a frame pointer that moves
back down the stack frame. It must always grow up (toward older stack
frames).
I doubt this has triggered, but a subtly corrupt stack with extremely
unlucky contents could cause us to loop forever on a bogus endless frame
pointer chain.
This review was triggered by much worse problems happening in some of
the other stack unwinding code.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions