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avcodec/h2645_parse: Use av_fast_realloc() for nals array

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Fixes: Timeout (17sec ->281ms)
Fixes: 17833/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_H264_fuzzer-5638346914660352

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-10-05 18:19:39 +02:00
parent e3650dcfc9
commit 22bec0d33f
2 changed files with 6 additions and 1 deletions
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6
libavcodec/h2645_parse.c
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@ -455,8 +455,12 @@ int ff_h2645_packet_split(H2645Packet *pkt, const uint8_t *buf, int length,
if (pkt->nals_allocated < pkt->nb_nals + 1) {
int new_size = pkt->nals_allocated + 1;
void *tmp = av_realloc_array(pkt->nals, new_size, sizeof(*pkt->nals));
void *tmp;
if (new_size >= INT_MAX / sizeof(*pkt->nals))
return AVERROR(ENOMEM);
tmp = av_fast_realloc(pkt->nals, &pkt->nal_buffer_size, new_size * sizeof(*pkt->nals));
if (!tmp)
return AVERROR(ENOMEM);

1
libavcodec/h2645_parse.h
View File

@ -78,6 +78,7 @@ typedef struct H2645Packet {
H2645RBSP rbsp;
int nb_nals;
int nals_allocated;
unsigned nal_buffer_size;
} H2645Packet;
/**