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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2009-12-31 03:52:25 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-01-13 09:32:54 +0100 |
| commit | c2c5d45d46c8c0fd34291dec958670ad4816796f (patch) | |
| tree | 3d65ac0b76107abb6cf30982f69ccb9120de5be7 /tools | |
| parent | 7284ce6c9f6153d1777df5f310c959724d1bd446 (diff) | |
| download | op-kernel-dev-c2c5d45d46c8c0fd34291dec958670ad4816796f.zip op-kernel-dev-c2c5d45d46c8c0fd34291dec958670ad4816796f.tar.gz | |
perf: Stop stack frame walking off kernel addresses boundaries
While processing kernel perf callchains, an bad entry can be
considered as a valid stack pointer but not as a kernel address.
In this case, we hang in an endless loop. This can happen in an
x86-32 kernel after processing the last entry in a kernel
stacktrace.
Just stop the stack frame walking after we encounter an invalid
kernel address.
This fixes a hard lockup in x86-32.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1262227945-27014-1-git-send-regression-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions
