eessppeelllloo/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2025-12-13 18:40:03 +01:00
Code Issues Packages Projects Releases Wiki Activity

avcodec/hevcdec: Avoid null pointer dereferences in MC

Browse Source 
Fixes: runtime error: pointer index expression with base 0x000000000000 overflowed to 0xfffffffffffffff8
Fixes: 58440/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HEVC_fuzzer-5956015530311680

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit a0f4d4e650)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2023-05-25 23:40:18 +02:00
parent 0ecd301a86
commit 8ce4ea824a
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
libavcodec/hevcdec.c
View File

@@ -1892,13 +1892,13 @@ static void hls_prediction_unit(HEVCContext *s, int x0, int y0,
if (current_mv.pred_flag & PF_L0) { if (current_mv.pred_flag & PF_L0) {
ref0 = refPicList[0].ref[current_mv.ref_idx[0]]; ref0 = refPicList[0].ref[current_mv.ref_idx[0]];
if (!ref0) if (!ref0 || !ref0->frame->data[0])
return; return;
hevc_await_progress(s, ref0, &current_mv.mv[0], y0, nPbH); hevc_await_progress(s, ref0, &current_mv.mv[0], y0, nPbH);
} }
if (current_mv.pred_flag & PF_L1) { if (current_mv.pred_flag & PF_L1) {
ref1 = refPicList[1].ref[current_mv.ref_idx[1]]; ref1 = refPicList[1].ref[current_mv.ref_idx[1]];
if (!ref1) if (!ref1 || !ref1->frame->data[0])
return; return;
hevc_await_progress(s, ref1, &current_mv.mv[1], y0, nPbH); hevc_await_progress(s, ref1, &current_mv.mv[1], y0, nPbH);
} }