Re: [PATCH net-next] tipc: Fix NULL pointer dereference in __tipc_sendstream()

2020-06-01 Thread David Miller
From: YueHaibing Date: Thu, 28 May 2020 22:34:07 +0800 > tipc_sendstream() may send zero length packet, then tipc_msg_append() > do not alloc skb, skb_peek_tail() will get NULL, msg_set_ack_required > will trigger NULL pointer dereference. > > Reported-by: syzbot+8eac6d030e7807c21...@syzkaller.a

Re: [PATCH net-next] tipc: Fix NULL pointer dereference in __tipc_sendstream()

2020-06-01 Thread David Miller
From: YueHaibing Date: Thu, 28 May 2020 22:34:07 +0800 > tipc_sendstream() may send zero length packet, then tipc_msg_append() > do not alloc skb, skb_peek_tail() will get NULL, msg_set_ack_required > will trigger NULL pointer dereference. > > Reported-by: syzbot+8eac6d030e7807c21...@syzkaller.a

[PATCH net-next] tipc: Fix NULL pointer dereference in __tipc_sendstream()

2020-05-28 Thread YueHaibing
tipc_sendstream() may send zero length packet, then tipc_msg_append() do not alloc skb, skb_peek_tail() will get NULL, msg_set_ack_required will trigger NULL pointer dereference. Reported-by: syzbot+8eac6d030e7807c21...@syzkaller.appspotmail.com Fixes: 0a3e060f340d ("tipc: add test for Nagle algor