From 3a1810f1c19f582322452184f636f3b0123ba9ff Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Sun, 4 Aug 2024 22:00:35 +0200
Subject: [PATCH] avformat/img2dec: Clear padding data after EOF

Fixes: use-of-uninitialized-value
Fixes: 70852/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-5179190066872320

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Kacper Michajlow <kasper93@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 3978e81809a3daf278199849f7bbeacbffb9fa09)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/img2dec.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavformat/img2dec.c b/libavformat/img2dec.c
index ec6fe6ec85..91c0e38a28 100644
--- a/libavformat/img2dec.c
+++ b/libavformat/img2dec.c
@@ -511,6 +511,7 @@ int ff_img_read_packet(AVFormatContext *s1, AVPacket *pkt)
         }
         goto fail;
     } else {
+        memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
         s->img_count++;
         s->img_number++;
         s->pts++;