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From: Charan Teja Kalla <quic_charante@quicinc.com>
To: "T.J. Mercier" <tjmercier@google.com>
Cc: "Sumit Semwal" <sumit.semwal@linaro.org>,
	"Christian König" <christian.koenig@amd.com>,
	"Hridya Valsaraju" <hridya@google.com>,
	daniel.vetter@ffwll.ch,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org,
	linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] dma-buf: call dma_buf_stats_setup after dmabuf is in valid list
Date: Tue, 10 May 2022 08:13:31 +0530	[thread overview]
Message-ID: <51bc6d33-c5f5-2a6e-fd83-ffebbe2e0202@quicinc.com> (raw)
In-Reply-To: <CABdmKX2V55tA-Or6Dd+bpbcv3fDHps_+zHHJQwhz819LX_2RSQ@mail.gmail.com>

Hello Mercier,

On 5/10/2022 3:19 AM, T.J. Mercier wrote:
> On Mon, May 9, 2022 at 12:50 PM Charan Teja Kalla
> <quic_charante@quicinc.com> wrote:
>> From: Charan Teja Reddy <quic_charante@quicinc.com>
>>
>> When dma_buf_stats_setup() fails, it closes the dmabuf file which
>> results into the calling of dma_buf_file_release() where it does
>> list_del(&dmabuf->list_node) with out first adding it to the proper
>> list. This is resulting into panic in the below path:
>> __list_del_entry_valid+0x38/0xac
>> dma_buf_file_release+0x74/0x158
>> __fput+0xf4/0x428
>> ____fput+0x14/0x24
>> task_work_run+0x178/0x24c
>> do_notify_resume+0x194/0x264
>> work_pending+0xc/0x5f0
>>
>> Fix it by moving the dma_buf_stats_setup() after dmabuf is added to the
>> list.
>>
>> Fixes: bdb8d06dfefd ("dmabuf: Add the capability to expose DMA-BUF stats in sysfs")
>> Signed-off-by: Charan Teja Reddy <quic_charante@quicinc.com>
> Tested-by: T.J. Mercier <tjmercier@google.com>
> Acked-by: T.J. Mercier <tjmercier@google.com>
> 

Thanks for the Ack. Also Realized that it should have:
Cc: <stable@vger.kernel.org> # 5.15.x+

WARNING: multiple messages have this Message-ID (diff)
From: Charan Teja Kalla <quic_charante@quicinc.com>
To: "T.J. Mercier" <tjmercier@google.com>
Cc: daniel.vetter@ffwll.ch, linux-kernel@vger.kernel.org,
	dri-devel@lists.freedesktop.org,
	"Christian König" <christian.koenig@amd.com>,
	linaro-mm-sig@lists.linaro.org,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Hridya Valsaraju" <hridya@google.com>,
	"Sumit Semwal" <sumit.semwal@linaro.org>,
	linux-media@vger.kernel.org
Subject: Re: [PATCH] dma-buf: call dma_buf_stats_setup after dmabuf is in valid list
Date: Tue, 10 May 2022 08:13:31 +0530	[thread overview]
Message-ID: <51bc6d33-c5f5-2a6e-fd83-ffebbe2e0202@quicinc.com> (raw)
In-Reply-To: <CABdmKX2V55tA-Or6Dd+bpbcv3fDHps_+zHHJQwhz819LX_2RSQ@mail.gmail.com>

Hello Mercier,

On 5/10/2022 3:19 AM, T.J. Mercier wrote:
> On Mon, May 9, 2022 at 12:50 PM Charan Teja Kalla
> <quic_charante@quicinc.com> wrote:
>> From: Charan Teja Reddy <quic_charante@quicinc.com>
>>
>> When dma_buf_stats_setup() fails, it closes the dmabuf file which
>> results into the calling of dma_buf_file_release() where it does
>> list_del(&dmabuf->list_node) with out first adding it to the proper
>> list. This is resulting into panic in the below path:
>> __list_del_entry_valid+0x38/0xac
>> dma_buf_file_release+0x74/0x158
>> __fput+0xf4/0x428
>> ____fput+0x14/0x24
>> task_work_run+0x178/0x24c
>> do_notify_resume+0x194/0x264
>> work_pending+0xc/0x5f0
>>
>> Fix it by moving the dma_buf_stats_setup() after dmabuf is added to the
>> list.
>>
>> Fixes: bdb8d06dfefd ("dmabuf: Add the capability to expose DMA-BUF stats in sysfs")
>> Signed-off-by: Charan Teja Reddy <quic_charante@quicinc.com>
> Tested-by: T.J. Mercier <tjmercier@google.com>
> Acked-by: T.J. Mercier <tjmercier@google.com>
> 

Thanks for the Ack. Also Realized that it should have:
Cc: <stable@vger.kernel.org> # 5.15.x+

  reply	other threads:[~2022-05-10  2:43 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-09 19:49 [PATCH] dma-buf: call dma_buf_stats_setup after dmabuf is in valid list Charan Teja Kalla
2022-05-09 19:49 ` Charan Teja Kalla
2022-05-09 21:49 ` T.J. Mercier
2022-05-09 21:49   ` T.J. Mercier
2022-05-10  2:43   ` Charan Teja Kalla [this message]
2022-05-10  2:43     ` Charan Teja Kalla
2022-05-10  9:31     ` Christian König
2022-05-10  9:31       ` Christian König

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