From: Sabrina Dubroca <sd@queasysnail.net>
Date: Mon, 23 Mar 2026 15:19:43 +0000 (+0100)
Subject: rtnetlink: fix leak of SRCU struct in rtnl_link_register
X-Git-Tag: ceph-for-7.1-rc1~126^2~7
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=09474055f2619be9445ba4245e4013741ed01a5e;p=ceph-client.git

rtnetlink: fix leak of SRCU struct in rtnl_link_register

Commit 6b57ff21a310 ("rtnetlink: Protect link_ops by mutex.") swapped
the EEXIST check with the init_srcu_struct, but didn't add cleanup of
the SRCU struct we just allocated in case of error.

Fixes: 6b57ff21a310 ("rtnetlink: Protect link_ops by mutex.")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/e77fe499f9a58c547b33b5212b3596dad417cec6.1774025341.git.sd@queasysnail.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 4a2278614250..fae8034efbff 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -629,6 +629,9 @@ int rtnl_link_register(struct rtnl_link_ops *ops)
 unlock:
 	mutex_unlock(&link_ops_mutex);
 
+	if (err)
+		cleanup_srcu_struct(&ops->srcu);
+
 	return err;
 }
 EXPORT_SYMBOL_GPL(rtnl_link_register);