mirror of https://git.ffmpeg.org/ffmpeg.git
avformat/mov: Check size before subtraction
Fixes: signed integer overflow: -9223372036854775808 - 8 cannot be represented in type 'long'
Fixes: 43542/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-5237670148702208
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit d8d9d506a3
)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
parent
210b4b9871
commit
423a3b685f
|
@ -6897,6 +6897,8 @@ static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
|
||||||
if (a.size == 0) {
|
if (a.size == 0) {
|
||||||
a.size = atom.size - total_size + 8;
|
a.size = atom.size - total_size + 8;
|
||||||
}
|
}
|
||||||
|
if (a.size < 0)
|
||||||
|
break;
|
||||||
a.size -= 8;
|
a.size -= 8;
|
||||||
if (a.size < 0)
|
if (a.size < 0)
|
||||||
break;
|
break;
|
||||||
|
|
Loading…
Reference in New Issue