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Subject[PATCH] ftrace: remove KASAN poison in ftrace_ops_test()
Date
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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