From https://bugs.chromium.org/p/chromium/issues/detail?id=1095962 ---------------------------- This seems to be caused by the custom handling of "av_max_alloc(0)" in Chromium's ffmpeg fork to mean unlimited (added in [1]).
Upstream ffmpeg doesn't treat 0 as a special value; versions before 4.3 seemingly worked because 32 was subtracted from max_alloc_size (set to 0 by Chromium) resulting in an integer underflow, making the effective limit be SIZE_MAX - 31. Now that the above underflow doesn't happen, the tab just crashes. The upstream change for no longer subtracting 32 from max_alloc_size was included in ffmpeg 4.3. [2] [1] https://chromium-review.googlesource.com/c/chromium/third_party/ffmpeg/+/73563 [2] https://github.com/FFmpeg/FFmpeg/commit/731c77589841 --------------------------- Restore av_malloc_max(0) to MAX_INT fixing MS Teams, Discord older chromium etc. Signed-off-by: Joakim Tjernlund <joakim.tjernl...@infinera.com> --- v2: Cover the full API range 0-31 v3: Closer compat with < 4.3 ffmpeg v4: Adjust size accoriding to Andreas Rheinhardt comments libavutil/mem.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavutil/mem.c b/libavutil/mem.c index cfb6d8a..44870a9 100644 --- a/libavutil/mem.c +++ b/libavutil/mem.c @@ -71,6 +71,8 @@ void free(void *ptr); static size_t max_alloc_size= INT_MAX; void av_max_alloc(size_t max){ + if (max < 32) + max = SIZE_MAX - 32 + max; /* be compatible to older(< 4.3) versions */ max_alloc_size = max; } -- 2.26.2 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
