Messages in this thread Patch in this message | | | From | Zhizhou Zhang <> | Subject | [PATCH] ftrace: remove KASAN poison in ftrace_ops_test() | Date | Sun, 11 Nov 2018 23:10:17 +0800 |
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ftrace_ops_test() passed local varible parameter to hash_contains_ip(), which could result KASAN stack-out-of-bounds warning.
Signed-off-by: Zhizhou Zhang <zhizhouzhang@asrmicro.com> --- kernel/trace/ftrace.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index f536f60..6e11f90 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1522,6 +1522,8 @@ ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs) rcu_assign_pointer(hash.filter_hash, ops->func_hash->filter_hash); rcu_assign_pointer(hash.notrace_hash, ops->func_hash->notrace_hash); + kasan_unpoison_task_stack(current); + if (hash_contains_ip(ip, &hash)) ret = 1; else -- 2.7.4
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