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| author | Yi Yang <yiyang13@huawei.com> | 2022-11-18 10:15:34 +0900 |
|---|---|---|
| committer | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2022-11-18 10:15:34 +0900 |
| commit | 0a1ebe35cb3b7aa1f4b26b37e2a0b9ae68dc4ffb (patch) | |
| tree | 5c75101639b1b9dbef0dd42fad838504a48fe19f /kernel | |
| parent | d1776c0202aac8251e6b4cbe096ad2950ed6c506 (diff) | |
| download | linux-0a1ebe35cb3b7aa1f4b26b37e2a0b9ae68dc4ffb.tar.bz2 | |
rethook: fix a potential memleak in rethook_alloc()
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>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/rethook.c | 4 |
1 files changed, 3 insertions, 1 deletions
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; |