The sock ref counting is off so there is a kernel panic when you run `atalkd`. See https://bugzilla.kernel.org/show_bug.cgi?id=79441 This fix is similar to 0ae89beb283a ('can: add destructor for self generated skbs')
Reported-by: Ed Martin <[email protected]> Signed-off-by: Andrey Utkin <[email protected]> --- net/appletalk/ddp.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c index 01a1082..3d8ab34 100644 --- a/net/appletalk/ddp.c +++ b/net/appletalk/ddp.c @@ -1399,6 +1399,11 @@ drop: return NET_RX_DROP; } +static inline void atalk_skb_destructor(struct sk_buff *skb) +{ + sock_put(skb->sk); +} + /** * atalk_rcv - Receive a packet (in skb) from device dev * @skb - packet received @@ -1489,6 +1494,8 @@ static int atalk_rcv(struct sk_buff *skb, struct net_device *dev, goto drop; /* Queue packet (standard) */ + sock_hold(sock); + skb->destructor = atalk_skb_destructor; skb->sk = sock; if (sock_queue_rcv_skb(sock, skb) < 0) @@ -1644,6 +1651,8 @@ static int atalk_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr if (!skb) goto out; + sock_hold(sk); + skb->destructor = atalk_skb_destructor; skb->sk = sk; skb_reserve(skb, ddp_dl->header_length); skb_reserve(skb, dev->hard_header_len); -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
