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Date: Tue, 10 May 2022 11:31:39 +0200 From: Christian König <christian.koenig@....com> To: Charan Teja Kalla <quic_charante@...cinc.com>, "T.J. Mercier" <tjmercier@...gle.com> Cc: Sumit Semwal <sumit.semwal@...aro.org>, Hridya Valsaraju <hridya@...gle.com>, daniel.vetter@...ll.ch, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] dma-buf: call dma_buf_stats_setup after dmabuf is in valid list Am 10.05.22 um 04:43 schrieb Charan Teja Kalla: > 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@...cinc.com> wrote: >>> From: Charan Teja Reddy <quic_charante@...cinc.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@...cinc.com> >> Tested-by: T.J. Mercier <tjmercier@...gle.com> >> Acked-by: T.J. Mercier <tjmercier@...gle.com> >> > Thanks for the Ack. Also Realized that it should have: > Cc: <stable@...r.kernel.org> # 5.15.x+ Reviewed and pushed to drm-misc-fixes. Thanks, Christian.
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