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[FFmpeg-devel,06/11] avcodec/utils: the IFF_ILBM implementation assumes that there are a multiple of 16 allocated

Message ID 20230416164830.15664-6-michael@niedermayer.cc
State Accepted
Commit 34056a94eab5f8fbc7e0b8510f7c9851931f23b7
Headers show
Series [FFmpeg-devel,01/11] avcodec/adpcm: Fix integer overflow in intermediate in ADPCM_XMD | expand

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Context Check Description
andriy/make_x86 success Make finished
andriy/make_fate_x86 success Make fate finished

Commit Message

Michael Niedermayer April 16, 2023, 4:48 p.m. UTC 
Fixes: out of array access
Fixes: 45982/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IFF_ILBM_fuzzer-5124452659888128
Fixes: 45982/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IFF_ILBM_fuzzer-6362836707442688

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavcodec/utils.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 599da21dba2..ef1845954e8 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -317,7 +317,7 @@  void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
     }
 
     if (s->codec_id == AV_CODEC_ID_IFF_ILBM) {
-        w_align = FFMAX(w_align, 8);
+        w_align = FFMAX(w_align, 16);
     }
 
     *width  = FFALIGN(*width, w_align);