avformat/avidec: Ignore duplicate GAB2

Fixes: memleak
Fixes: 398401912/clusterfuzz-testcase-minimized-ffmpeg_dem_AVI_fuzzer-4669849976766464

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2025-05-10 01:55:27 +02:00
parent 1a5ed492e5
commit 6a47046981
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@ -1122,6 +1122,10 @@ static int read_gab2_sub(AVFormatContext *s, AVStream *st, AVPacket *pkt)
int size;
AVProbeData pd;
unsigned int desc_len;
if (ast->sub_ctx)
return 0;
AVIOContext *pb = avio_alloc_context(pkt->data + 7,
pkt->size - 7,
0, NULL, NULL, NULL, NULL);