From 845b613bf283153652eee70f99a97f5af9d17c89 Mon Sep 17 00:00:00 2001 From: Dikshita Agarwal Date: Tue, 20 Aug 2024 07:05:53 +0000 Subject: [PATCH] media: venus: fix use after free in vdec_close stable inclusion from stable-v5.10.224 commit 4c9d235630d35db762b85a4149bbb0be9d504c36 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAKQ1L CVE: CVE-2024-42313 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=4c9d235630d35db762b85a4149bbb0be9d504c36 -------------------------------- 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: af2c3834c8ca ("[media] media: venus: adding core part and helper functions") Signed-off-by: Dikshita Agarwal Acked-by: Vikash Garodia Signed-off-by: Stanimir Varbanov Signed-off-by: Hans Verkuil Signed-off-by: Greg Kroah-Hartman Signed-off-by: Xia Fukun --- drivers/media/platform/qcom/venus/vdec.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c index ea13170a6a2c..8c2601c0e5c6 100644 --- a/drivers/media/platform/qcom/venus/vdec.c +++ b/drivers/media/platform/qcom/venus/vdec.c @@ -1541,6 +1541,7 @@ static int vdec_close(struct file *file) vdec_pm_get(inst); + cancel_work_sync(&inst->delayed_process_work); v4l2_m2m_ctx_release(inst->m2m_ctx); v4l2_m2m_release(inst->m2m_dev); vdec_ctrl_deinit(inst); -- Gitee