From 71ea26811cbd8345cb10ab29406594e1fc19204e Mon Sep 17 00:00:00 2001
From: "Ronald S. Bultje" <rsbultje@gmail.com>
Date: Thu, 22 Mar 2012 11:50:48 -0700
Subject: [PATCH] aacsbr: handle m_max values smaller than 4.
Prevents a signflip in the counter, and a subsequent crash because of
overreads/overwrites.
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
---
libavcodec/x86/sbrdsp.asm | 1 +
1 file changed, 1 insertion(+)
diff --git a/libavcodec/x86/sbrdsp.asm b/libavcodec/x86/sbrdsp.asm
index 31a1c8b76f2..6f66327088a 100644
--- a/libavcodec/x86/sbrdsp.asm
+++ b/libavcodec/x86/sbrdsp.asm
@@ -81,6 +81,7 @@ cglobal sbr_hf_g_filt, 5, 6, 5
lea r2, [r2 + r3*4]
lea r0, [r0 + r3*8]
neg r3
+ jz .loop1
.loop4:
movlps m0, [r2 + 4*r3 + 0]
movlps m1, [r2 + 4*r3 + 8]
--
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