media: venus: fix use after free in vdec_close
commit a0157b5aa34eb43ec4c5510f9c260bbb03be937e upstream. There appears to be a possible use after free with vdec_close(). The firmware will add buffer release work to the work queue through HFI callbacks as a normal part of decoding. Randomly closing the decoder device from userspace during normal decoding can incur a read after free for inst. Fix it by cancelling the work in vdec_close. Cc: stable@vger.kernel.org Fixes: af2c3834 ("[media] media: venus: adding core part and helper functions") Signed-off-by:Dikshita Agarwal <quic_dikshita@quicinc.com> Acked-by:
Vikash Garodia <quic_vgarodia@quicinc.com> Signed-off-by:
Stanimir Varbanov <stanimir.k.varbanov@gmail.com> Signed-off-by:
Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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