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Merge pull request #6410 from lat9nq/avoid-oob

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decoders: Avoid out-of-bounds access
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bunnei 2021-06-07 10:51:17 -07:00 committed by GitHub
commit df91c9f5e6
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1 changed files with 8 additions and 0 deletions
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8
src/video_core/textures/decoders.cpp
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@ -63,6 +63,14 @@ void Swizzle(std::span<u8> output, std::span<const u8> input, u32 bytes_per_pixe
const u32 unswizzled_offset = const u32 unswizzled_offset =
slice * pitch * height + line * pitch + column * bytes_per_pixel; slice * pitch * height + line * pitch + column * bytes_per_pixel;
if (const auto offset = (TO_LINEAR ? unswizzled_offset : swizzled_offset);
offset >= input.size()) {
// TODO(Rodrigo): This is an out of bounds access that should never happen. To
// avoid crashing the emulator, break.
ASSERT_MSG(false, "offset {} exceeds input size {}!", offset, input.size());
break;
}
u8* const dst = &output[TO_LINEAR ? swizzled_offset : unswizzled_offset]; u8* const dst = &output[TO_LINEAR ? swizzled_offset : unswizzled_offset];
const u8* const src = &input[TO_LINEAR ? unswizzled_offset : swizzled_offset]; const u8* const src = &input[TO_LINEAR ? unswizzled_offset : swizzled_offset];
std::memcpy(dst, src, bytes_per_pixel); std::memcpy(dst, src, bytes_per_pixel);