From 66f0c958bfd5475658b432d1af4d2e174b2dfcda Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 4 Nov 2017 01:19:19 +0100 Subject: [PATCH] avcodec/exr: fix undefined shift in pxr24_uncompress() Fixes: runtime error: left shift of 255 by 24 places cannot be represented in type 'int' Fixes: 3787/clusterfuzz-testcase-minimized-5728764920070144 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Paul B Mahol Signed-off-by: Michael Niedermayer --- libavcodec/exr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/exr.c b/libavcodec/exr.c index 0b755db3cb..b1ecde4ebd 100644 --- a/libavcodec/exr.c +++ b/libavcodec/exr.c @@ -855,7 +855,7 @@ static int pxr24_uncompress(EXRContext *s, const uint8_t *src, in = ptr[2] + td->xsize; for (j = 0; j < td->xsize; ++j) { - uint32_t diff = (*(ptr[0]++) << 24) | + uint32_t diff = ((unsigned)*(ptr[0]++) << 24) | (*(ptr[1]++) << 16) | (*(ptr[2]++) << 8); pixel += diff;