| Message ID | 20220917211557.11547-3-michael@niedermayer.cc |
|---|---|
| State | Accepted |
| Commit | 736e9e69d5dbbe1d81885dfef59917eb915d2f96 |
| Headers | show |
| Series | [FFmpeg-devel,1/9] avformat/ape: Check frames size | expand |
| Context | Check | Description |
|---|---|---|
| yinshiyou/make_loongarch64 | success | Make finished |
| yinshiyou/make_fate_loongarch64 | success | Make fate finished |
| andriy/make_x86 | success | Make finished |
| andriy/make_fate_x86 | success | Make fate finished |
diff --git a/libavformat/asfdec_o.c b/libavformat/asfdec_o.c index 48b7d17322d..e837ca62e7f 100644 --- a/libavformat/asfdec_o.c +++ b/libavformat/asfdec_o.c @@ -1242,6 +1242,8 @@ static int asf_read_packet_header(AVFormatContext *s) unsigned char error_flags, len_flags, pay_flags; asf->packet_offset = avio_tell(pb); + if (asf->packet_offset > INT64_MAX/2) + asf->packet_offset = 0; error_flags = avio_r8(pb); // read Error Correction Flags if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT) { if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) {
avoids overflows with it Fixes: signed integer overflow: 9223372036846866010 + 4294967047 cannot be represented in type 'long' Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_ASF_O_fuzzer-6538296768987136 Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_ASF_O_fuzzer-657169555665715 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavformat/asfdec_o.c | 2 ++ 1 file changed, 2 insertions(+)