From: Yi Yang yiyang13@huawei.com

In rethook_alloc(), the variable rh is not freed or passed out if handler is NULL, which could lead to a memleak, fix it.

Link: https://lore.kernel.org/all/20221110104438.88099-1-yiyang13@huawei.com/ [Masami: Add "rethook:" tag to the title.]

Fixes: 54ecbe6f1ed5 ("rethook: Add a generic return hook") Cc: stable@vger.kernel.org Signed-off-by: Yi Yang yiyang13@huawei.com Acke-by: Masami Hiramatsu (Google) mhiramat@kernel.org Signed-off-by: Masami Hiramatsu (Google) mhiramat@kernel.org --- kernel/trace/rethook.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/rethook.c b/kernel/trace/rethook.c index c69d82273ce7..32c3dfdb4d6a 100644 --- a/kernel/trace/rethook.c +++ b/kernel/trace/rethook.c @@ -83,8 +83,10 @@ struct rethook *rethook_alloc(void *data, rethook_handler_t handler) { struct rethook *rh = kzalloc(sizeof(struct rethook), GFP_KERNEL);

- if (!rh || !handler) + if (!rh || !handler) { + kfree(rh); return NULL; + }

rh->data = data; rh->handler = handler;