linux-kernel - Re: [PATCH] Bluetooth: Fix hci_suspend

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Date:   Thu, 13 Jul 2023 20:10:22 +0000
From:   patchwork-bot+bluetooth@...nel.org
To:     Ying Hsu <yinghsu@...omium.org>
Cc:     linux-bluetooth@...r.kernel.org,
        chromeos-bluetooth-upstreaming@...omium.org,
        johan.hedberg@...il.com, luiz.dentz@...il.com, marcel@...tmann.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Bluetooth: Fix hci_suspend_sync crash

Hello:

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

On Wed,  5 Jul 2023 21:06:47 +0000 you wrote:
> If hci_unregister_dev() frees the hci_dev object but hci_suspend_notifier
> may still be accessing it, it can cause the program to crash.
> Here's the call trace:
>   <4>[102152.653246] Call Trace:
>   <4>[102152.653254]  hci_suspend_sync+0x109/0x301 [bluetooth]
>   <4>[102152.653259]  hci_suspend_dev+0x78/0xcd [bluetooth]
>   <4>[102152.653263]  hci_suspend_notifier+0x42/0x7a [bluetooth]
>   <4>[102152.653268]  notifier_call_chain+0x43/0x6b
>   <4>[102152.653271]  __blocking_notifier_call_chain+0x48/0x69
>   <4>[102152.653273]  __pm_notifier_call_chain+0x22/0x39
>   <4>[102152.653276]  pm_suspend+0x287/0x57c
>   <4>[102152.653278]  state_store+0xae/0xe5
>   <4>[102152.653281]  kernfs_fop_write+0x109/0x173
>   <4>[102152.653284]  __vfs_write+0x16f/0x1a2
>   <4>[102152.653287]  ? selinux_file_permission+0xca/0x16f
>   <4>[102152.653289]  ? security_file_permission+0x36/0x109
>   <4>[102152.653291]  vfs_write+0x114/0x21d
>   <4>[102152.653293]  __x64_sys_write+0x7b/0xdb
>   <4>[102152.653296]  do_syscall_64+0x59/0x194
>   <4>[102152.653299]  entry_SYSCALL_64_after_hwframe+0x5c/0xc1
> 
> [...]

Here is the summary with links:
  - Bluetooth: Fix hci_suspend_sync crash
    https://git.kernel.org/bluetooth/bluetooth-next/c/0c9bf63ad8ca

You are awesome, thank you!
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