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Message-Id: <20221028092516.19070-1-abelova@astralinux.ru>
Date: Fri, 28 Oct 2022 12:25:16 +0300
From: Anastasia Belova <abelova@...ralinux.ru>
To: Vinod Koul <vkoul@...nel.org>
Cc: Anastasia Belova <abelova@...ralinux.ru>,
dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
lvc-project@...uxtesting.org
Subject: [PATCH] vdec_vp9_if: add check for NULL for vsi->frm_bufs[vsi->new_fb_idx].buf.fb in vp9_swap_frm_bufs
If vsi->frm_bufs[vsi->new_fb_idx].buf.fb == NULL while cleaning
fb_free_list NULL-pointer is dereferenced.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Signed-off-by: Anastasia Belova <abelova@...ralinux.ru>
---
drivers/media/platform/mtk-vcodec/vdec/vdec_vp9_if.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/platform/mtk-vcodec/vdec/vdec_vp9_if.c b/drivers/media/platform/mtk-vcodec/vdec/vdec_vp9_if.c
index d9880210b2ab..dea056689b48 100644
--- a/drivers/media/platform/mtk-vcodec/vdec/vdec_vp9_if.c
+++ b/drivers/media/platform/mtk-vcodec/vdec/vdec_vp9_if.c
@@ -512,7 +512,7 @@ static void vp9_swap_frm_bufs(struct vdec_vp9_inst *inst)
* clean fb_free_list
*/
if (vsi->frm_bufs[vsi->new_fb_idx].ref_cnt == 0) {
- if (!vp9_is_sf_ref_fb(
+ if (vsi->frm_bufs[vsi->new_fb_idx].buf.fb != NULL && !vp9_is_sf_ref_fb(
inst, vsi->frm_bufs[vsi->new_fb_idx].buf.fb)) {
struct vdec_fb *fb;
--
2.30.2
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