tree 797092fc19f9af8b6e5242c1987137dd362f51bc
parent 74fca6a42863ffacaf7ba6f1936a9f228950f657
author Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> 1252997076 +0800
committer Ingo Molnar <mingo@elte.hu> 1253001211 +0200

perf_counter: Fix buffer overflow in perf_copy_attr()

If we pass a big size data over perf_counter_open() syscall,
the kernel will copy this data to a small buffer, it will
cause kernel crash.

This bug makes the kernel unsafe and non-root local user can
trigger it.

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Paul Mackerras <paulus@samba.org>
Cc: <stable@kernel.org>
LKML-Reference: <4AAF37D4.5010706@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>