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Subject[PATCH 1/2] phonet: take correct lock to peek at the RX queue
Date
From: Rémi Denis-Courmont <courmisch@gmail.com>

Reported-by: Luosili <rootlab@huawei.com>
Signed-off-by: Rémi Denis-Courmont <courmisch@gmail.com>
---
net/phonet/datagram.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/phonet/datagram.c b/net/phonet/datagram.c
index 3aa50dc7535b..976fe250b509 100644
--- a/net/phonet/datagram.c
+++ b/net/phonet/datagram.c
@@ -34,10 +34,10 @@ static int pn_ioctl(struct sock *sk, int cmd, int *karg)

switch (cmd) {
case SIOCINQ:
- lock_sock(sk);
+ spin_lock_bh(&sk->sk_receive_queue.lock);
skb = skb_peek(&sk->sk_receive_queue);
*karg = skb ? skb->len : 0;
- release_sock(sk);
+ spin_unlock_bh(&sk->sk_receive_queue.lock);
return 0;

case SIOCPNADDRESOURCE:
--
2.43.0

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