x86/lossless_videodsp: don't overread the dst buffer in ff_add_left_pred_unaligned_avx2

Fixes valgrind Signed-off-by: James Almer <jamrial@gmail.com>
2017-12-10 00:38:05 -03:00 · 2017-12-10 00:38:05 -03:00 · a4fc63c0f9
parent f20c8f6ec9
commit a4fc63c0f9
1 changed files with 1 additions and 2 deletions
--- a/libavcodec/x86/lossless_videodsp.asm
+++ b/libavcodec/x86/lossless_videodsp.asm
@ -154,8 +154,7 @@ MEDIAN_PRED
    add     wq, mmsize
    jl %%.loop
 %if mmsize == 32
-    mov    eax, [dstq -1]
-    and    eax, 0xff
+    movzx   eax, byte [dstq - 1]
 %else;
    mov     eax, mmsize-1
    sub     eax, wd