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tun: add a missing rcu_read_unlock() in error path

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commit 9180bb4f04 upstream.

In my latest patch I missed one rcu_read_unlock(), in case
device is down.

Fixes: 4477138fa0 ("tun: properly test for IFF_UP")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eric Dumazet
2019-03-16 13:09:53 -07:00
committed by Greg Kroah-Hartman
parent 63a85fb487
commit 6caa2c1036
1 changed files with 1 additions and 0 deletions
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drivers/net/tun.c
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@@ -1569,6 +1569,7 @@ drop:
rcu_read_lock();
if (unlikely(!(tun->dev->flags & IFF_UP))) {
err = -EIO;
rcu_read_unlock();
goto drop;
}