apps/ffmpeg-rockchip
1
0
Fork 0
mirror of https://github.com/nyanmisaka/ffmpeg-rockchip.git synced 2025-10-18 22:55:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

avformat/rmdec: Actually return value < 0 on read_header failure

Browse Source 
The RealMedia demuxer's read_header function initially initializes ret,
the variable designated for the return variable to -1. Afterwards, chunks
of the file are parsed in a loop until an error happens or until the actual
frame data is encountered. If the first function whose return
value is put into ret doesn't fail, then ret contains a value >= 0
(actually == 0) and this is what will be returned if an error is
encountered afterwards.

This is a regression since 35bbc1955a.
Before that, ret had never been overwritten with a nonnegative value.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt
2020-07-20 21:14:15 +02:00
parent ea45d6e61a
commit 4cc43d30c3
1 changed files with 5 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
libavformat/rmdec.c
View File

@@ -538,7 +538,7 @@ static int rm_read_header(AVFormatContext *s)
unsigned int data_off = 0, indx_off = 0; unsigned int data_off = 0, indx_off = 0;
char buf[128], mime[128]; char buf[128], mime[128];
int flags = 0; int flags = 0;
int ret = -1; int ret;
unsigned size, v; unsigned size, v;
int64_t codec_pos; int64_t codec_pos;
@@ -554,6 +554,7 @@ static int rm_read_header(AVFormatContext *s)
avio_skip(pb, tag_size - 8); avio_skip(pb, tag_size - 8);
for(;;) { for(;;) {
ret = AVERROR_INVALIDDATA;
if (avio_feof(pb)) if (avio_feof(pb))
goto fail; goto fail;
tag = avio_rl32(pb); tag = avio_rl32(pb);
@@ -619,8 +620,9 @@ static int rm_read_header(AVFormatContext *s)
avio_seek(pb, codec_pos + size, SEEK_SET); avio_seek(pb, codec_pos + size, SEEK_SET);
} else { } else {
avio_skip(pb, -4); avio_skip(pb, -4);
if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data, ret = ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
size, mime) < 0) size, mime);
if (ret < 0)
goto fail; goto fail;
} }