Messages in this thread Patch in this message | | | From | Benjamin Poirier <> | Subject | [PATCH net 1/3] unix/dgram: peek beyond 0-sized skbs | Date | Thu, 25 Apr 2013 09:47:16 -0400 |
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"77c1090 net: fix infinite loop in __skb_recv_datagram()" (v3.8) introduced a regression: After that commit, recv can no longer peek beyond a 0-sized skb in the queue. __skb_recv_datagram() instead stops at the first skb with len == 0 and results in the system call failing with -EFAULT via skb_copy_datagram_iovec().
Signed-off-by: Benjamin Poirier <bpoirier@suse.de> --- net/core/datagram.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/core/datagram.c b/net/core/datagram.c index 368f9c3..02398ae 100644 --- a/net/core/datagram.c +++ b/net/core/datagram.c @@ -187,7 +187,7 @@ struct sk_buff *__skb_recv_datagram(struct sock *sk, unsigned int flags, skb_queue_walk(queue, skb) { *peeked = skb->peeked; if (flags & MSG_PEEK) { - if (*off >= skb->len && skb->len) { + if (*off >= skb->len && (skb->len || *off)) { *off -= skb->len; continue; } -- 1.7.10.4
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