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Bluetooth: L2CAP: Fix use-after-free

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[ Upstream commit f752a0b334 ]

Fix potential use-after-free in l2cap_le_command_rej.

Signed-off-by: Zhengping Jiang <jiangzp@google.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhengping Jiang 2023-05-24 17:04:15 -07:00 • committed by Justin Hammond
parent 9179c0ea04
commit 29b3feab3d
1 changed files with 5 additions and 0 deletions
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5
net/bluetooth/l2cap_core.c
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@ -6375,9 +6375,14 @@ static inline int l2cap_le_command_rej(struct l2cap_conn *conn,
if (!chan)
goto done;
chan = l2cap_chan_hold_unless_zero(chan);
if (!chan)
goto done;
l2cap_chan_lock(chan);
l2cap_chan_del(chan, ECONNREFUSED);
l2cap_chan_unlock(chan);
l2cap_chan_put(chan);
done:
mutex_unlock(&conn->chan_lock);