Reading the header terminates when an fcTL chunk is encountered in which case read_header returned success without checking the length of said chunk. Yet when read_packet processes this chunk, it checks for the length to be 26 and errors out otherwise. So do so when reading the header, too.
Signed-off-by: Andreas Rheinhardt <[email protected]> --- libavformat/apngdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/apngdec.c b/libavformat/apngdec.c index d8d0de190f..6b2ce2e251 100644 --- a/libavformat/apngdec.c +++ b/libavformat/apngdec.c @@ -226,7 +226,7 @@ static int apng_read_header(AVFormatContext *s) ctx->num_frames, ctx->num_play); break; case MKTAG('f', 'c', 'T', 'L'): - if (!acTL_found) { + if (!acTL_found || len != 26) { ret = AVERROR_INVALIDDATA; goto fail; } -- 2.25.1 _______________________________________________ ffmpeg-devel mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
