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| author | Min Li <lm0963hack@gmail.com> | 2023-04-17 10:27:54 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-30 12:38:35 +0100 |
| commit | 5f352a56f0e607e6ff539cbf12156bfd8af232be (patch) | |
| tree | eb123bd9fddf5b34ef4e927b910ca2794bf55fd0 | |
| parent | 76b5ea43ad2fb4f726ddfaff839430a706e7d7c2 (diff) | |
| download | linux-stable-5f352a56f0e607e6ff539cbf12156bfd8af232be.tar.gz linux-stable-5f352a56f0e607e6ff539cbf12156bfd8af232be.tar.bz2 linux-stable-5f352a56f0e607e6ff539cbf12156bfd8af232be.zip | |
Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp
[ Upstream commit 25e97f7b1866e6b8503be349eeea44bb52d661ce ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -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 6f47cb69775d..b0bb4cf52a7e 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -4392,7 +4392,6 @@ 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; } |