David Ahern cbbdf8433a netlink: extack needs to be reset each time through loop
syzbot triggered the WARN_ON in netlink_ack testing the bad_attr value.
The problem is that netlink_rcv_skb loops over the skb repeatedly invoking
the callback and without resetting the extack leaving potentially stale
data. Initializing each time through avoids the WARN_ON.

Fixes: 2d4bc93368f5a ("netlink: extended ACK reporting")
Reported-by: syzbot+315fa6766d0f7c359327@syzkaller.appspotmail.com
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-15 13:50:07 -05:00
..
2017-12-13 13:18:46 -05:00
2017-11-01 12:19:03 +09:00
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2018-01-10 14:53:22 -05:00