From: Xiyu Yang xiyuyang19@fudan.edu.cn
[ Upstream commit 441870ee4240cf67b5d3ab8e16216a9ff42eb5d6 ]
tipc_crypto_rcv() invokes tipc_aead_get(), which returns a reference of the tipc_aead object to "aead" with increased refcnt.
When tipc_crypto_rcv() returns, the original local reference of "aead" becomes invalid, so the refcount should be decreased to keep refcount balanced.
The issue happens in one error path of tipc_crypto_rcv(). When TIPC message decryption status is EINPROGRESS or EBUSY, the function forgets to decrease the refcnt increased by tipc_aead_get() and causes a refcnt leak.
Fix this issue by calling tipc_aead_put() on the error path when TIPC message decryption status is EINPROGRESS or EBUSY.
Signed-off-by: Xiyu Yang xiyuyang19@fudan.edu.cn Signed-off-by: Xin Tan tanxin.ctf@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/tipc/crypto.c | 1 + 1 file changed, 1 insertion(+)
--- a/net/tipc/crypto.c +++ b/net/tipc/crypto.c @@ -1712,6 +1712,7 @@ exit: case -EBUSY: this_cpu_inc(stats->stat[STAT_ASYNC]); *skb = NULL; + tipc_aead_put(aead); return rc; default: this_cpu_inc(stats->stat[STAT_NOK]);