[FFmpeg-cvslog] aacsbr: handle m_max values smaller than 4.

[Ronald S. Bultje]

ffmpeg | branch: master | Ronald S. Bultje <rsbultje at gmail.com> | Thu Mar 22 11:50:48 2012 -0700| [71ea26811cbd8345cb10ab29406594e1fc19204e] | committer: Ronald S. Bultje

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 at libav.org

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=71ea26811cbd8345cb10ab29406594e1fc19204e
---

 libavcodec/x86/sbrdsp.asm |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/libavcodec/x86/sbrdsp.asm b/libavcodec/x86/sbrdsp.asm
index 31a1c8b..6f66327 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]