ffmpeg | branch: release/4.3 | Michael Niedermayer <mich...@niedermayer.cc> | 
Sun Jul  3 02:31:47 2022 +0200| [3f3ee1489d70948244e4f760e9e1732266694deb] | 
committer: Michael Niedermayer

avcodec/wnv1: Check for width =1

The decoder only outputs pixels for width >1 images, fail early

Fixes: Timeout
Fixes: 
48298/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WNV1_fuzzer-6198626319204352

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
(cherry picked from commit d98d5a436aa70d3cef8f914c0467ef2fb2dd1dfc)
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3f3ee1489d70948244e4f760e9e1732266694deb
---

 libavcodec/wnv1.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/wnv1.c b/libavcodec/wnv1.c
index 857807a951..8019807a87 100644
--- a/libavcodec/wnv1.c
+++ b/libavcodec/wnv1.c
@@ -122,6 +122,9 @@ static av_cold int decode_init(AVCodecContext *avctx)
 {
     static VLC_TYPE code_table[1 << CODE_VLC_BITS][2];
 
+    if (avctx->width <= 1)
+        return AVERROR_INVALIDDATA;
+
     avctx->pix_fmt = AV_PIX_FMT_YUV422P;
 
     code_vlc.table           = code_table;

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