From: David Rientjes <rientjes@google.com>
Date: Tue, 7 Oct 2008 21:15:11 +0000 (-0700)
Subject: x86: avoid dereferencing beyond stack + THREAD_SIZE
X-Git-Tag: v2.6.28-rc1~703^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e1e23bb0513520035ec934fa3483507cb6648b7c;p=pandora-kernel.git

x86: avoid dereferencing beyond stack + THREAD_SIZE

It's possible for get_wchan() to dereference past task->stack + THREAD_SIZE
while iterating through instruction pointers if fp equals the upper boundary,
causing a kernel panic.

Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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