macvlan: Fix device ref leak when purging bc_queue
authorHerbert Xu <herbert@gondor.apana.org.au>
Thu, 20 Apr 2017 12:55:12 +0000 (20:55 +0800)
committerDavid S. Miller <davem@davemloft.net>
Tue, 25 Apr 2017 14:42:10 +0000 (10:42 -0400)
commitf6478218e6edc2a587b8f132f66373baa7b2497c
tree85d69a0d169b13b811aa8a7244b1335b9d8d00c8
parent6f2aee0c0de65013333bbc26fe50c9c7b09a37f7
macvlan: Fix device ref leak when purging bc_queue

When a parent macvlan device is destroyed we end up purging its
broadcast queue without dropping the device reference count on
the packet source device.  This causes the source device to linger.

This patch drops that reference count.

Fixes: 260916dfb48c ("macvlan: Fix potential use-after free for...")
Reported-by: Joe Ghalam <Joe.Ghalam@dell.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/macvlan.c