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Fix warnings about invalid reads in AVX2 ipol

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AVX2 filter functions read pixels in chunks of 8 or 16 bytes. At the end
of the block, the read goes out of the bounds of the pixels array. The
extra pixels do not affect the result.

Fixes valgrind complaining about the invalid reads by allocating 5 extra
pixels in kvz_get_extended_block_avx2
This commit is contained in:
Arttu Ylä-Outinen 2017-06-21 15:03:45 +03:00
parent 4d20e156db
commit 2c66e0bbd2
1 changed files with 3 additions and 1 deletions
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4
src/strategies/avx2/ipol-avx2.c
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@ -1384,7 +1384,9 @@ void kvz_get_extended_block_avx2(int xpos, int ypos, int mv_x, int mv_y, int off
int sample_out_of_bounds = out_of_bounds_y || out_of_bounds_x;
if (sample_out_of_bounds){
out->buffer = MALLOC(kvz_pixel, (width + filter_size) * (height + filter_size));
// Alloc 5 pixels more than we actually use because AVX2 filter
// functions read up to 5 pixels past the last pixel.
out->buffer = MALLOC(kvz_pixel, (width + filter_size) * (height + filter_size) + 5);
if (!out->buffer){
fprintf(stderr, "Memory allocation failed!\n");
assert(0);