Fixes: signed integer overflow: 539033600 - -1910497124 cannot be represented in type 'int'
Fixes: 30928/clusterfuzz-testcase-minimized-ffmpeg_dem_WTV_fuzzer-5922630966312960
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Fixes: signed integer overflow: 136323327 * 281474976710656 cannot be represented in type 'long'
Fixes: 30913/clusterfuzz-testcase-minimized-ffmpeg_dem_IVF_fuzzer-5753392189931520
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
The check has been added at a time when the code performed the
multiplication itself instead of deferring it to av_malloc_array()
and when our allocation functions used unsigned instead of size_t.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
The check has been added at a time when the code performed the
multiplication itself instead of deferring it to av_malloc_array()
and when our allocation functions used unsigned instead of size_t.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This check is outdated because the caller doesn't need to check that
the multiplication overflows when using av_realloc_array() (the code
in question used av_realloc() before that); furthermore, the check
is also a remnant of the time in which our allocation functions
didn't use size_t parameters.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Affects the FATE-tests webm-dash-manifest-unaligned-video-streams,
webm-dash-manifest and webm-dash-manifest-representations.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Fixes: signed integer overflow: -1957694447 + -1620425806 cannot be represented in type 'int'
Fixes: 30207/clusterfuzz-testcase-minimized-ffmpeg_dem_JACOSUB_fuzzer-5050791771635712
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Fixes: signed integer overflow: -2147483648 - 1 cannot be represented in type 'int'
Fixes: 30209/clusterfuzz-testcase-minimized-ffmpeg_dem_FLV_fuzzer-5724831658147840
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This is important, for example, for connection timed out events,
when used over a network, returning AVERROR(ETIMEDOUT).
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Fixes: signed integer overflow: 2 * 1914708000 cannot be represented in type 'int'
Fixes: 31639/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-6303428239294464
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Fixes: signed integer overflow: 9223372036854775807 + 86400000000 cannot be represented in type 'long'
Fixes: 31003/clusterfuzz-testcase-minimized-ffmpeg_dem_SBG_fuzzer-6256298771480576
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Also free the gme_info_t structure immediately after its use.
This simplifies cleanup, because it might be unsafe to call
gme_free_info(NULL) (or even worse, gme_track_info() might even
on error set the pointer to the gme_info_t structure to something
else than NULL).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
When the trailer is never written (or when a stream switches from
non-animation mode to animation mode mid-stream), a cached packet
(if existing) would leak. Fix this by adding a deinit function.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
The WebP muxer sometimes caches a packet it receives to write it later;
yet if a cached packet is too small (so small as to be invalid),
it is cached, but not written and not unreferenced. Such a packet leaks,
either by being overwritten by the next packet or because it is never
unreferenced at all.
Fix this by not caching unusable packets at all; and error out on
invalid packets.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Replace it in ipmovie_read_header() by AVFormatInternal.parse_pkt
which is unused when reading the header.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
They will be discarded anyway because this can only happen
for invalid data. This already implies that the pkt won't be used
at all when parsing the very first chunk when reading the header,
so one can use NULL as argument and remove the av_packet_unref()
on error.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
When one of these errors happens during ipmovie_read_packet(),
an error is returned and the packet is cleaned up generically.
And since 712d3ac539 the same happens
in ipmovie_read_header().
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Replace it by using AVFormatInternal.parse_pkt which is otherwise unused
when reading a header.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Before 8d78e90a6b the Matroska demuxer
used stack packets to hold temporary packets; now it uses a temporary
packet allocated by the Matroska demuxer. Yet because it used stack
packets the code has always properly reset the packet on error, while
on success these temporary packets were put into a packet list via
avpriv_packet_list_put(), which already resets the source packet.
This means that this code is compatible with just reusing
AVFormatInternal.parse_pkt (which is unused while one is in the
demuxer's read_packet() function). Compared to before 8d78e90a6
this no longer wastes one initialization per AVPacket read
(the resetting of the stack packet performed by av_packet_move_ref()
in avpriv_packet_list_put() was for naught).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Originally added in 12f996edfa
behind #if 0; aebb56e184 then
removed the #if and replaced it by using av_dlog. Then commit
1a3eb042c7 replaced this with av_log
at trace level. Yet the code block always stayed within { }
at an increased level of indentation.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This makes av_read_frame() return packets with proper timestamps.
As a result, seeking now works in combination with streamcopy.
A FATE-test for this has been added.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Currently, ff_read_packet() sometimes forwards the return value of
AVInputFormat.read_packet() (which should be zero on success, but isn't
for all demuxers) and sometimes it overwrites this with zero.
Furthermore, it uses two variables, one for the read_packet return value
and one for other errors, which is a bit confusing; it is also
unnecessary given that the documentation explicitly states that
ff_read_packet() never returns positive values. Returning a positive
value would lead to leaks with some callers (namely asfrtp_parse_packet
and estimate_timings_from_pts). So always return zero in case of
success.
(This behaviour stems from a time before av_read_packet sanitized
the return value of read_packet at all: It was added in commit
626004690c and was unnecessary since
88b00723906f68b7563214c30333e48888dddf78.)
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
