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mov: stsd entries must be at least 16 byte

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Fix near infinite loop in stsd parsing.
Bug found by: Diana Elena Muscalu

The size is unsigned according the specification.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Michael Niedermayer 2011-12-15 20:51:00 +01:00 committed by Luca Barbato
parent 9db67bedf0
commit a5ea623b36
1 changed files with 4 additions and 1 deletions
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5
libavformat/mov.c
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@ -1098,13 +1098,16 @@ int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
int dref_id = 1;
MOVAtom a = { AV_RL32("stsd") };
int64_t start_pos = avio_tell(pb);
int size = avio_rb32(pb); /* size */
uint32_t size = avio_rb32(pb); /* size */
uint32_t format = avio_rl32(pb); /* data format */
if (size >= 16) {
avio_rb32(pb); /* reserved */
avio_rb16(pb); /* reserved */
dref_id = avio_rb16(pb);
} else {
av_log(c->fc, AV_LOG_ERROR, "invalid size %d in stsd\n", size);
return AVERROR_INVALIDDATA;
}
if (st->codec->codec_tag &&