FFmpeg/FFmpeg
5
Fork 8
Code Issues Pull requests 4 Releases Wiki Activity Actions

avformat/dhav: Check amount read

Browse source 
Prevents potential use of uninitialized data in the following
memcmp().

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2024-05-22 06:57:19 +02:00
parent cf6d07522a
commit d8cad01805
1 changed files with 3 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
libavformat/dhav.c
View file

@ -278,7 +278,9 @@ static int dhav_read_header(AVFormatContext *s)
if (ret < 0) if (ret < 0)
return ret; return ret;
avio_read(s->pb, signature, sizeof(signature)); ret = ffio_read_size(s->pb, signature, sizeof(signature));
if (ret < 0)
return ret;
if (!memcmp(signature, "DAHUA", 5)) { if (!memcmp(signature, "DAHUA", 5)) {
avio_skip(s->pb, 0x400 - 5); avio_skip(s->pb, 0x400 - 5);
dhav->last_good_pos = avio_tell(s->pb); dhav->last_good_pos = avio_tell(s->pb);