Subject: [PATCH] inet: missing lock releases in udp.c

From: ycaibb <[email-masked]>
Date: Fri, 21 Jan 2022 11:15:53 +0800

From: Ryan Cai <[email-masked]>

In method udp_get_first, the lock hslot->lock is not released when afinfo->family == AF_UNSPEC || sk->sk_family == afinfo->family is true. This patch fixes the problem by adding the unlock statement.

Signed-off-by: Ryan Cai <[email-masked]>
---
 net/ipv4/udp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 23b05e28490b..f7d573ecaafb 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -2967,6 +2967,7 @@ static struct sock *udp_get_first(struct seq_file *seq, int start)
 				continue;
 			if (afinfo->family == AF_UNSPEC ||
 			    sk->sk_family == afinfo->family)
+				spin_unlock_bh(&hslot->lock);
 				goto found;
 		}
 		spin_unlock_bh(&hslot->lock);
-- 
2.33.0