Re: [FFmpeg-devel] [PATCH 2/2] avutil/common: Fix integer overflow in av_ceil_log2_c()
On Sun, Jun 28, 2020 at 01:46:53AM +0200, Michael Niedermayer wrote: > Fixes: left shift of 1913647649 by 1 places cannot be represented in type > 'int' > Fixes: > 23572/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMALOSSLESS_fuzzer-5082619795734528 > > Found-by: continuous fuzzing process > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer > --- > libavutil/common.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) will apply [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Never trust a computer, one day, it may think you are the virus. -- Compn signature.asc Description: PGP signature ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-devel] [PATCH 2/2] avutil/common: Fix integer overflow in av_ceil_log2_c()
Fixes: left shift of 1913647649 by 1 places cannot be represented in type 'int'
Fixes:
23572/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMALOSSLESS_fuzzer-5082619795734528
Found-by: continuous fuzzing process
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer
---
libavutil/common.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavutil/common.h b/libavutil/common.h
index 2777cea9f9..92b721a59c 100644
--- a/libavutil/common.h
+++ b/libavutil/common.h
@@ -371,7 +371,7 @@ static av_always_inline av_const double av_clipd_c(double
a, double amin, double
*/
static av_always_inline av_const int av_ceil_log2_c(int x)
{
-return av_log2((x - 1) << 1);
+return av_log2((x - 1U) << 1);
}
/**
--
2.17.1
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