Hello:
This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>:
On Fri, 1 Mar 2024 13:50:34 -0500 you wrote:
> From: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
>
> Attemting to do sock_lock on .recvmsg may cause a deadlock as shown
> bellow, so instead of using sock_sock this uses sk_receive_queue.lock
> on bt_sock_ioctl to avoid the UAF:
>
> INFO: task kworker/u9:1:121 blocked for more than 30 seconds.
> Not tainted 6.7.6-lemon #183
> Workqueue: hci0 hci_rx_work
> Call Trace:
> <TASK>
> __schedule+0x37d/0xa00
> schedule+0x32/0xe0
> __lock_sock+0x68/0xa0
> ? __pfx_autoremove_wake_function+0x10/0x10
> lock_sock_nested+0x43/0x50
> l2cap_sock_recv_cb+0x21/0xa0
> l2cap_recv_frame+0x55b/0x30a0
> ? psi_task_switch+0xeb/0x270
> ? finish_task_switch.isra.0+0x93/0x2a0
> hci_rx_work+0x33a/0x3f0
> process_one_work+0x13a/0x2f0
> worker_thread+0x2f0/0x410
> ? __pfx_worker_thread+0x10/0x10
> kthread+0xe0/0x110
> ? __pfx_kthread+0x10/0x10
> ret_from_fork+0x2c/0x50
> ? __pfx_kthread+0x10/0x10
> ret_from_fork_asm+0x1b/0x30
> </TASK>
>
> [...]
Here is the summary with links:
- [v1] Bluetooth: af_bluetooth: Fix deadlock
https://git.kernel.org/bluetooth/bluetooth-next/c/40245851528a
You are awesome, thank you!
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