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 <[email protected]>
Giphy · Jun 30, 2020 · e409262 · e409262
1 parent 21598d7
commit e409262
Showing 1 changed file with 1 addition and 1 deletion.
diff --git 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);
 }
 
 /**