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avformat/mov: free the infe allocated item data on failure 

Fixes: memleak
Fixes: 68212/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-4963488540721152

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Tested-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2024-04-26 21:26:01 -03:00
parent d11be191fa
commit e09164940e
1 changed files with 25 additions and 6 deletions
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31
libavformat/mov.c
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@ -84,6 +84,7 @@ typedef struct MOVParseTableEntry {
static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
static int mov_read_mfra(MOVContext *c, AVIOContext *f);
static void mov_free_stream_context(AVFormatContext *s, AVStream *st);
static int64_t add_ctts_entry(MOVCtts** ctts_data, unsigned int* ctts_count, unsigned int* allocated_size,
int count, int duration);
@ -8160,6 +8161,7 @@ static int mov_read_infe(MOVContext *c, AVIOContext *pb, MOVAtom atom, int idx)
if (version < 2) {
avpriv_report_missing_feature(c->fc, "infe version < 2");
avio_skip(pb, size);
return 1;
}
@ -8203,7 +8205,7 @@ static int mov_read_iinf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
HEIFItem *heif_item;
int entry_count;
int version, ret;
int version, got_stream = 0, ret, i;
if (c->found_iinf) {
av_log(c->fc, AV_LOG_WARNING, "Duplicate iinf box found\n");
@ -8223,20 +8225,33 @@ static int mov_read_iinf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
sizeof(*c->heif_item) * (entry_count - c->nb_heif_item));
c->nb_heif_item = FFMAX(c->nb_heif_item, entry_count);
for (int i = 0; i < entry_count; i++) {
for (i = 0; i < entry_count; i++) {
MOVAtom infe;
infe.size = avio_rb32(pb) - 8;
infe.type = avio_rl32(pb);
ret = mov_read_infe(c, pb, infe, i);
if (ret < 0)
return ret;
if (ret)
return 0;
goto fail;
if (!ret)
got_stream = 1;
}
c->found_iinf = 1;
c->found_iinf = got_stream;
return 0;
fail:
for (; i >= 0; i--) {
HEIFItem *item = &c->heif_item[i];
av_freep(&item->name);
if (!item->st)
continue;
mov_free_stream_context(c->fc, item->st);
ff_remove_stream(c->fc, item->st);
item->st = NULL;
}
return ret;
}
static int mov_read_iref_dimg(MOVContext *c, AVIOContext *pb, int version)
@ -9583,6 +9598,10 @@ static int mov_read_header(AVFormatContext *s)
return err;
}
}
// prevent iloc and iinf boxes from being parsed while reading packets.
// this is needed because an iinf box may have been parsed but ignored
// for having old infe boxes which create no streams.
mov->found_iloc = mov->found_iinf = 1;
if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
if (mov->nb_chapter_tracks > 0 && !mov->ignore_chapters)