[PATCH] net/handshake: Fix memory leak in tls_handshake_accept()

Zilin Guan
2025-11-06T14:45:22Z

In tls_handshake_accept(), a netlink message is allocated using
genlmsg_new(). In the error handling path, genlmsg_cancel() is called
to cancel the message construction, but the message itself is not freed.
This leads to a memory leak.

Fix this by calling nlmsg_free() in the error path after genlmsg_cancel()
to release the allocated memory.

Fixes: 2fd5532044a89 ("net/handshake: Add a kernel API for requesting a TLSv1.3 handshake")
Signed-off-by: Zilin Guan <zilin@seu.edu.cn>
---
net/handshake/tlshd.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/net/handshake/tlshd.c b/net/handshake/tlshd.c
index 081093dfd553..8f9532a15f43 100644
--- a/net/handshake/tlshd.c
+++ b/net/handshake/tlshd.c
@@ -259,6 +259,7 @@ static int tls_handshake_accept(struct handshake_req *req,

out_cancel:
genlmsg_cancel(msg, hdr);
+ nlmsg_free(msg);
out:
return ret;
}
--
2.34.1