From: Hangyu Hua
mainline inclusion
from mainline-v5.16-rc6
commit bcd0f93353326954817a4f9fa55ec57fb38acbb0
category: bugfix
issue: #I4RVJ4
CVE: CVE-2021-45095
Reference: https://patchwork.kernel.org/project/netdevbpf/patch/20211209082839.33985-1-...
Signed-off-by: Yu Changchun
-------------------------------------------------------------------
sock_hold(sk) is invoked in pep_sock_accept(), but __sock_put(sk) is not
invoked in subsequent failure branches(pep_accept_conn() != 0).
Signed-off-by: Hangyu Hua
Link: https://lore.kernel.org/r/20211209082839.33985-1-hbh25y@gmail.com
Signed-off-by: Jakub Kicinski
Signed-off-by: Huang Guobin
Signed-off-by: Zheng Zengkai
Signed-off-by: Yu Changchun
---
net/phonet/pep.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/net/phonet/pep.c b/net/phonet/pep.c
index a1525916885a..b4f90afb0638 100644
--- a/net/phonet/pep.c
+++ b/net/phonet/pep.c
@@ -868,6 +868,7 @@ static struct sock *pep_sock_accept(struct sock *sk, int flags, int *errp,
err = pep_accept_conn(newsk, skb);
if (err) {
+ __sock_put(sk);
sock_put(newsk);
newsk = NULL;
goto drop;
--
2.25.1
