calib3d: fix invalid memory access

alalek · alalek · commit 2e1725116076 · 2017-07-26T17:21:46.000+03:00
diff --git a/modules/calib3d/src/stereobm.cpp b/modules/calib3d/src/stereobm.cpp
@@ -227,7 +227,7 @@ prefilterXSobel( const Mat& src, Mat& dst, int ftzero )
             v_int16x8 ftz2 = v_setall_s16((short)(ftzero*2));
             v_int16x8 z = v_setzero_s16();
 
-            for(; x <= size.width-8; x += 8 )
+            for(; x <= (size.width - 1) - 8; x += 8 )
             {
                 v_int16x8 s00 = v_reinterpret_as_s16(v_load_expand(srow0 + x + 1));
                 v_int16x8 s01 = v_reinterpret_as_s16(v_load_expand(srow0 + x - 1));

Original file line number	Diff line number	Diff line change
`@@ -227,7 +227,7 @@ prefilterXSobel( const Mat& src, Mat& dst, int ftzero )`
`227`	`227`	`v_int16x8 ftz2 = v_setall_s16((short)(ftzero*2));`
`228`	`228`	`v_int16x8 z = v_setzero_s16();`
`229`	`229`
`230`		`- for(; x <= size.width-8; x += 8 )`
	`230`	`+ for(; x <= (size.width - 1) - 8; x += 8 )`
`231`	`231`	`{`
`232`	`232`	`v_int16x8 s00 = v_reinterpret_as_s16(v_load_expand(srow0 + x + 1));`
`233`	`233`	`v_int16x8 s01 = v_reinterpret_as_s16(v_load_expand(srow0 + x - 1));`