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avcodec/mjpegdec: Fix runtime error: signed integer overflow: -32767 * 130560 cannot...
author
Michael Niedermayer
<michael@niedermayer.cc>
Sun, 21 May 2017 19:49:54 +0000
(21:49 +0200)
committer
Michael Niedermayer
<michael@niedermayer.cc>
Mon, 22 May 2017 00:16:39 +0000
(
02:16
+0200)
Fixes: 1724/clusterfuzz-testcase-minimized-
4842395432648704
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/mjpegdec.c
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diff --git
a/libavcodec/mjpegdec.c
b/libavcodec/mjpegdec.c
index
ed381de
..
5cdb489
100644
(file)
--- a/
libavcodec/mjpegdec.c
+++ b/
libavcodec/mjpegdec.c
@@
-757,7
+757,7
@@
static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
int component, int dc_index,
uint16_t *quant_matrix, int Al)
{
-
int
val;
+
unsigned
val;
s->bdsp.clear_block(block);
val = mjpeg_decode_dc(s, dc_index);
if (val == 0xfffff) {