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commita0157b5aa3upstream. 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:af2c3834c8("[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>