llc: fix netdevice reference leaks in llc_ui_bind()
authorEric Dumazet <edumazet@google.com>
Wed, 23 Mar 2022 00:41:47 +0000 (17:41 -0700)
committerJakub Kicinski <kuba@kernel.org>
Wed, 23 Mar 2022 17:48:00 +0000 (10:48 -0700)
commit764f4eb6846f5475f1244767d24d25dd86528a4a
treed2f3fdff668f57179dd727d49b2a836ff2a325c7
parent2844e2434385819f674d1fb4130c308c50ba681e
llc: fix netdevice reference leaks in llc_ui_bind()

Whenever llc_ui_bind() and/or llc_ui_autobind()
took a reference on a netdevice but subsequently fail,
they must properly release their reference
or risk the infamous message from unregister_netdevice()
at device dismantle.

unregister_netdevice: waiting for eth0 to become free. Usage count = 3

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: 赵子轩 <beraphin@gmail.com>
Reported-by: Stoyan Manolov <smanolov@suse.de>
Link: https://lore.kernel.org/r/20220323004147.1990845-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
net/llc/af_llc.c