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| author |   Min Li <lm0963hack@gmail.com> | 2023-04-17 10:27:54 +0800 |
|---|---|---|
| committer |   Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2023-04-23 22:05:23 -0700 |
| commit | 25e97f7b1866e6b8503be349eeea44bb52d661ce (patch) | |
| tree | 2e8901a8126a28777e499945ae8bc378834c6941 /net/bluetooth/l2cap_core.c | |
| parent | bluetooth: Add cmd validity checks at the start of hci_sock_ioctl() (diff) | |
| download | linux-25e97f7b1866e6b8503be349eeea44bb52d661ce.tar.xz linux-25e97f7b1866e6b8503be349eeea44bb52d661ce.zip | |
Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp
conn->chan_lock isn't acquired before l2cap_get_chan_by_scid,
if l2cap_get_chan_by_scid returns NULL, then 'bad unlock balance'
is triggered.
Reported-by: syzbot+9519d6b5b79cf7787cf3@syzkaller.appspotmail.com
Link: https://lore.kernel.org/all/000000000000894f5f05f95e9f4d@google.com/
Signed-off-by: Min Li <lm0963hack@gmail.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Diffstat (limited to 'net/bluetooth/l2cap_core.c')
| -rw-r--r-- | net/bluetooth/l2cap_core.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 5cc95fd17f7d..376b523c7b26 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -4693,7 +4693,6 @@ static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, chan = l2cap_get_chan_by_scid(conn, scid); if (!chan) { - mutex_unlock(&conn->chan_lock); return 0; } |