avcodec_open2() also called the AVCodec's close function if an error
happened before init had ever been called if the AVCodec has the
FF_CODEC_CAP_INIT_CLEANUP flag set. This is against the documentation of
said flag: "The codec allows calling the close function for deallocation
even if the init function returned a failure."
E.g. the SVQ3 decoder is not ready to be closed if init has never been
called.
Fixes: NULL dereference
Fixes: 25762/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SVQ3_fuzzer-5716279070294016
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
|| avci->frame_thread_encoder)) {
ret = avctx->codec->init(avctx);
if (ret < 0) {
+ codec_init_ok = -1;
goto free_and_end;
}
codec_init_ok = 1;
return ret;
free_and_end:
if (avctx->codec && avctx->codec->close &&
- (codec_init_ok ||
- (avctx->codec->caps_internal & FF_CODEC_CAP_INIT_CLEANUP)))
+ (codec_init_ok > 0 || (codec_init_ok < 0 &&
+ avctx->codec->caps_internal & FF_CODEC_CAP_INIT_CLEANUP)))
avctx->codec->close(avctx);
if (HAVE_THREADS && avci->thread_ctx)