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authorLinus Torvalds <torvalds@woody.osdl.org>2006-11-17 11:14:56 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-11-17 11:14:56 -0800
commit808dbbb6bb61173bf52946a28f99089d2efa4c55 (patch)
tree4d221ed1e66ea09d244b248bb27998ac2efda119 /drivers/acpi
parent1ff5683043196b9ad628a5de6bf8eeca52ee8bfd (diff)
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 'drivers/acpi')
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