webrtc/modules/audio_coding/codecs/ilbc/smooth.c - Issue 2258543002: WebRtcIlbcfix_Smooth: Fix UBSan fuzzer bug (left shift of 1 by 31 overflows)

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Unified Diff: webrtc/modules/audio_coding/codecs/ilbc/smooth.c

Issue 2258543002: WebRtcIlbcfix_Smooth: Fix UBSan fuzzer bug (left shift of 1 by 31 overflows) (Closed) Base URL: https://chromium.googlesource.com/external/webrtc.git@master

Patch Set: Created 4 years, 4 months ago

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Index: webrtc/modules/audio_coding/codecs/ilbc/smooth.c

diff --git a/webrtc/modules/audio_coding/codecs/ilbc/smooth.c b/webrtc/modules/audio_coding/codecs/ilbc/smooth.c

index 269331cce4d4b7d00f4daccc0c9819ee6afd5c97..ed879327c096c941340956dff039c0db5780f4b5 100644

--- a/webrtc/modules/audio_coding/codecs/ilbc/smooth.c

+++ b/webrtc/modules/audio_coding/codecs/ilbc/smooth.c

@@ -168,7 +168,7 @@ void WebRtcIlbcfix_Smooth(

/* B_W32 is in Q30 ( B = 1 - ENH_A0/2 - A * w10/w00 ) */

scale1 = 31-bitsw10;

scale2 = 21-scale1;

- w10prim = w10 * (1 << scale1);

+ w10prim = w10 == 0 ? 0 : w10 * (1 << scale1);

w00prim = WEBRTC_SPL_SHIFT_W32(w00, -scale2);

scale = bitsw00-scale2-15;

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