From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Min Li <lm0963hack@gmail.com>,
syzbot+9519d6b5b79cf7787cf3@syzkaller.appspotmail.com,
Luiz Augusto von Dentz <luiz.von.dentz@intel.com>,
Sasha Levin <sashal@kernel.org>,
marcel@holtmann.org, johan.hedberg@gmail.com,
luiz.dentz@gmail.com, davem@davemloft.net, edumazet@google.com,
kuba@kernel.org, pabeni@redhat.com,
linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 13/13] Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp
Date: Thu, 4 May 2023 15:51:30 -0400 [thread overview]
Message-ID: <20230504195132.3808946-13-sashal@kernel.org> (raw)
In-Reply-To: <20230504195132.3808946-1-sashal@kernel.org>
From: Min Li <lm0963hack@gmail.com>
[ 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>
---
net/bluetooth/l2cap_core.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 1a68aad5737e1..94d40a20ab958 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;
}
--
2.39.2
prev parent reply other threads:[~2023-05-04 19:52 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-04 19:51 [PATCH AUTOSEL 4.19 01/13] wifi: brcmfmac: pcie: Provide a buffer of random bytes to the device Sasha Levin
2023-05-04 19:51 ` [PATCH AUTOSEL 4.19 02/13] wifi: brcmfmac: cfg80211: Pass the PMK in binary instead of hex Sasha Levin
2023-05-04 19:51 ` [PATCH AUTOSEL 4.19 04/13] net: pasemi: Fix return type of pasemi_mac_start_tx() Sasha Levin
2023-05-04 19:51 ` [PATCH AUTOSEL 4.19 05/13] net: Catch invalid index in XPS mapping Sasha Levin
2023-05-04 19:51 ` [PATCH AUTOSEL 4.19 12/13] wifi: iwlwifi: dvm: Fix memcpy: detected field-spanning write backtrace Sasha Levin
2023-05-04 19:51 ` Sasha Levin [this message]
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