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| author | Konstantin Khlebnikov <k.khlebnikov@samsung.com> | 2013-12-05 14:23:48 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2014-01-03 04:33:29 +0000 |
| commit | 46b831f219fa519f61e3bff8aeabb75298f706d1 (patch) | |
| tree | d14e8ea679ea0d2bb9b4054f521c7beacda1f932 /arch/arm | |
| parent | 07b4041f9b344111091f6acc11a8d407d0ff78c7 (diff) | |
| download | kernel_samsung_smdk4412-46b831f219fa519f61e3bff8aeabb75298f706d1.zip kernel_samsung_smdk4412-46b831f219fa519f61e3bff8aeabb75298f706d1.tar.gz kernel_samsung_smdk4412-46b831f219fa519f61e3bff8aeabb75298f706d1.tar.bz2 | |
ARM: 7913/1: fix framepointer check in unwind_frame
commit 3abb6671a9c04479c4bd026798a05f857393b7e2 upstream.
This patch fixes corner case when (fp + 4) overflows unsigned long,
for example: fp = 0xFFFFFFFF -> fp + 4 == 3.
Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/kernel/stacktrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/kernel/stacktrace.c b/arch/arm/kernel/stacktrace.c index 00f79e5..af4e8c8 100644 --- a/arch/arm/kernel/stacktrace.c +++ b/arch/arm/kernel/stacktrace.c @@ -31,7 +31,7 @@ int notrace unwind_frame(struct stackframe *frame) high = ALIGN(low, THREAD_SIZE); /* check current frame pointer is within bounds */ - if (fp < (low + 12) || fp + 4 >= high) + if (fp < low + 12 || fp > high - 4) return -EINVAL; /* restore the registers from the stack frame */ |