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author | Reimar Döffinger <Reimar.Doeffinger@gmx.de> | 2009-08-26 08:38:44 +0000 |
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committer | Reimar Döffinger <Reimar.Doeffinger@gmx.de> | 2009-08-26 08:38:44 +0000 |
commit | 44ed34b79097b972095e7c9efae32a13b4bc51dc (patch) | |
tree | ea9415e5188178963e5ac09d5893b72ddb5e0f59 /libavformat | |
parent | d5a30f86d470454001bd0dc0da61504d05fab9e9 (diff) | |
download | ffmpeg-streaming-44ed34b79097b972095e7c9efae32a13b4bc51dc.zip ffmpeg-streaming-44ed34b79097b972095e7c9efae32a13b4bc51dc.tar.gz |
Check for seek failures in avi_load_index, otherwise if the index offset
is invalid (e.g. truncated file) we might end up reading the whole file
since trying to seek beyond the end of file does not set EOF.
Originally committed as revision 19709 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavformat')
-rw-r--r-- | libavformat/avidec.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/libavformat/avidec.c b/libavformat/avidec.c index 7093e91..2175374 100644 --- a/libavformat/avidec.c +++ b/libavformat/avidec.c @@ -1001,8 +1001,10 @@ static int avi_load_index(AVFormatContext *s) ByteIOContext *pb = s->pb; uint32_t tag, size; int64_t pos= url_ftell(pb); + int ret = -1; - url_fseek(pb, avi->movi_end, SEEK_SET); + if (url_fseek(pb, avi->movi_end, SEEK_SET) < 0) + goto the_end; // maybe truncated file #ifdef DEBUG_SEEK printf("movi_end=0x%"PRIx64"\n", avi->movi_end); #endif @@ -1023,19 +1025,20 @@ static int avi_load_index(AVFormatContext *s) case MKTAG('i', 'd', 'x', '1'): if (avi_read_idx1(s, size) < 0) goto skip; - else + ret = 0; goto the_end; break; default: skip: size += (size & 1); - url_fskip(pb, size); + if (url_fseek(pb, size, SEEK_CUR) < 0) + goto the_end; // something is wrong here break; } } the_end: url_fseek(pb, pos, SEEK_SET); - return 0; + return ret; } static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) |