netlink: reset extack earlier in netlink_rcv_skb

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[ Upstream commit cd443f1e91 ]

Move up the extack reset/initialization in netlink_rcv_skb, so that
those 'goto ack' will not skip it. Otherwise, later on netlink_ack
may use the uninitialized extack and cause kernel crash.

Fixes: cbbdf8433a ("netlink: extack needs to be reset each time through loop")
Reported-by: syzbot+03bee3680a37466775e7@syzkaller.appspotmail.com
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Xin Long 2018-01-18 14:48:03 +08:00 • committed by Greg Kroah-Hartman

parent a8c21ba721

commit 48606bb1ee

1 changed files with 1 additions and 1 deletions

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net/netlink/af_netlink.c

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