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avformat/cafdec: Check nb_entries in read_info_chunk()

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Fixes: Timeout
Fixes: 477315122/clusterfuzz-testcase-minimized-ffmpeg_dem_CAF_fuzzer-5274792315125760

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 4f97e52042)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2026-02-10 22:46:58 +01:00
parent 31450268e6
commit 7306c2fa5c
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1 changed files with 4 additions and 0 deletions
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4
libavformat/cafdec.c
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@ -281,6 +281,10 @@ static void read_info_chunk(AVFormatContext *s, int64_t size)
AVIOContext *pb = s->pb;
unsigned int i;
unsigned int nb_entries = avio_rb32(pb);
if (3LL * nb_entries > size)
return;
for (i = 0; i < nb_entries && !avio_feof(pb); i++) {
char key[32];
char value[1024];