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Date:   Fri, 17 Nov 2023 16:20:23 +0000
To:     Ying Hsu <>
Subject: Re: [PATCH RESEND] Bluetooth: Fix deadlock in vhci_send_frame


This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <>:

On Fri, 10 Nov 2023 01:46:05 +0000 you wrote:
> syzbot found a potential circular dependency leading to a deadlock:
>     -> #3 (&hdev->req_lock){+.+.}-{3:3}:
>     __mutex_lock_common+0x1b6/0x1bc2 kernel/locking/mutex.c:599
>     __mutex_lock kernel/locking/mutex.c:732 [inline]
>     mutex_lock_nested+0x17/0x1c kernel/locking/mutex.c:784
>     hci_dev_do_close+0x3f/0x9f net/bluetooth/hci_core.c:551
>     hci_rfkill_set_block+0x130/0x1ac net/bluetooth/hci_core.c:935
>     rfkill_set_block+0x1e6/0x3b8 net/rfkill/core.c:345
>     rfkill_fop_write+0x2d8/0x672 net/rfkill/core.c:1274
>     vfs_write+0x277/0xcf5 fs/read_write.c:594
>     ksys_write+0x19b/0x2bd fs/read_write.c:650
>     do_syscall_x64 arch/x86/entry/common.c:55 [inline]
>     do_syscall_64+0x51/0xba arch/x86/entry/common.c:93
>     entry_SYSCALL_64_after_hwframe+0x61/0xcb
> [...]

Here is the summary with links:
  - [RESEND] Bluetooth: Fix deadlock in vhci_send_frame

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