Thread (2 messages) flat view 2 messages, 2 authors, 2021-03-22

Re: [PATCH] Bluetooth: initialize skb_queue_head at l2cap_chan_create()

From: Marcel Holtmann <marcel@holtmann.org>
Date: 2021-03-22 16:06:40
Also in: linux-bluetooth

Hi Tetsuo,
syzbot is hitting "INFO: trying to register non-static key." message [1],
for "struct l2cap_chan"->tx_q.lock spinlock is not yet initialized when
l2cap_chan_del() is called due to e.g. timeout.

Since "struct l2cap_chan"->lock mutex is initialized at l2cap_chan_create()
immediately after "struct l2cap_chan" is allocated using kzalloc(), let's
as well initialize "struct l2cap_chan"->{tx_q,srej_q}.lock spinlocks there.

[1] https://syzkaller.appspot.com/bug?extid=fadfba6a911f6bf71842

Reported-and-tested-by: syzbot <redacted>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
---
net/bluetooth/l2cap_core.c | 2 ++
1 file changed, 2 insertions(+)
patch has been applied to bluetooth-next tree.

Regards

Marcel
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