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authorMichael Niedermayer <michael@niedermayer.cc>2023-01-11 18:59:16 +0100
committerMichael Niedermayer <michael@niedermayer.cc>2023-02-25 21:40:02 +0100
commit8e478e0cb17158126571f40fb945ab807d6284ed (patch)
treed74a2722d1e76051f84f63d7c044257fa1339b82
parent81d9c57c431abd267ef21fc51bd6c7178b042b2f (diff)
downloadffmpeg-8e478e0cb17158126571f40fb945ab807d6284ed.tar.gz
avcodec/utils: allocate a line more for VC1 and WMV3
Fixes: out of array read on 32bit Fixes: 54857/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VC1_fuzzer-5840588224462848 The chroma MC code reads over the currently allocated frame. Alternative fixes would be allocating a few bytes more at the end instead of a whole line extra or to adjust the threshold where the edge emu code is activated 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 01636a63d452c592ece35af6f72bb7affcad58f2) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
-rw-r--r--libavcodec/utils.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 3b58c8a2ed..701bebe337 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -323,6 +323,7 @@ void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
*width = FFALIGN(*width, w_align);
*height = FFALIGN(*height, h_align);
if (s->codec_id == AV_CODEC_ID_H264 || s->lowres ||
+ s->codec_id == AV_CODEC_ID_VC1 || s->codec_id == AV_CODEC_ID_WMV3 ||
s->codec_id == AV_CODEC_ID_VP5 || s->codec_id == AV_CODEC_ID_VP6 ||
s->codec_id == AV_CODEC_ID_VP6F || s->codec_id == AV_CODEC_ID_VP6A
) {