mirror of https://git.ffmpeg.org/ffmpeg.git
avcodec/movtextdec: Fix decode_styl() cleanup
Fixes: null pointer dereference Fixes: 555/clusterfuzz-testcase-5986646595993600 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
parent
4fcdc9f359
commit
e248522d1b
|
@ -116,6 +116,8 @@ static void mov_text_cleanup(MovTextContext *m)
|
|||
av_freep(&m->s[i]);
|
||||
}
|
||||
av_freep(&m->s);
|
||||
m->count_s = 0;
|
||||
m->style_entries = 0;
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -279,12 +281,14 @@ static int decode_hclr(const uint8_t *tsmb, MovTextContext *m, AVPacket *avpkt)
|
|||
static int decode_styl(const uint8_t *tsmb, MovTextContext *m, AVPacket *avpkt)
|
||||
{
|
||||
int i;
|
||||
m->style_entries = AV_RB16(tsmb);
|
||||
int style_entries = AV_RB16(tsmb);
|
||||
tsmb += 2;
|
||||
// A single style record is of length 12 bytes.
|
||||
if (m->tracksize + m->size_var + 2 + m->style_entries * 12 > avpkt->size)
|
||||
if (m->tracksize + m->size_var + 2 + style_entries * 12 > avpkt->size)
|
||||
return -1;
|
||||
|
||||
m->style_entries = style_entries;
|
||||
|
||||
m->box_flags |= STYL_BOX;
|
||||
for(i = 0; i < m->style_entries; i++) {
|
||||
m->s_temp = av_malloc(sizeof(*m->s_temp));
|
||||
|
|
Loading…
Reference in New Issue