[FFmpeg-devel] [PATCH 2/3] avformat/jpegxl_anim_dec: Check that size fits within argument

[Michael Niedermayer]

Fixes: out of array access
Fixes: 61991/clusterfuzz-testcase-minimized-ffmpeg_dem_JPEGXL_ANIM_fuzzer-5524679648215040

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
 libavformat/jpegxl_anim_dec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/jpegxl_anim_dec.c b/libavformat/jpegxl_anim_dec.c
index fc95a1781f6..54cd6e4e9d6 100644
--- a/libavformat/jpegxl_anim_dec.c
+++ b/libavformat/jpegxl_anim_dec.c
@@ -152,6 +152,8 @@ static int jpegxl_anim_read_packet(AVFormatContext *s, AVPacket *pkt)
     size = avio_size(pb);
     if (size < 0)
         return size;
+    if (size > INT_MAX)
+        return AVERROR(EDOM);
     if (size == 0)
         size = 4096;
 
-- 
2.17.1