diff options
| author | Eric Dumazet <edumazet@google.com> | 2022-03-22 17:41:47 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-03-23 10:48:00 -0700 |
| commit | 764f4eb6846f5475f1244767d24d25dd86528a4a (patch) | |
| tree | d2f3fdff668f57179dd727d49b2a836ff2a325c7 /net | |
| parent | 2844e2434385819f674d1fb4130c308c50ba681e (diff) | |
| download | linux-764f4eb6846f5475f1244767d24d25dd86528a4a.tar.gz | |
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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/llc/af_llc.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c index 26c00ebf4fba..c86256064743 100644 --- a/net/llc/af_llc.c +++ b/net/llc/af_llc.c @@ -311,6 +311,10 @@ static int llc_ui_autobind(struct socket *sock, struct sockaddr_llc *addr) sock_reset_flag(sk, SOCK_ZAPPED); rc = 0; out: + if (rc) { + dev_put_track(llc->dev, &llc->dev_tracker); + llc->dev = NULL; + } return rc; } @@ -408,6 +412,10 @@ static int llc_ui_bind(struct socket *sock, struct sockaddr *uaddr, int addrlen) out_put: llc_sap_put(sap); out: + if (rc) { + dev_put_track(llc->dev, &llc->dev_tracker); + llc->dev = NULL; + } release_sock(sk); return rc; } |