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zink: do not dereference null-pointer

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The "locations" pointer can be null here, and memcpying from a null
pointer is not okay.

CID: 1485978

Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12559>
This commit is contained in:
Erik Faye-Lund 2021-08-26 00:09:44 +02:00 • committed by Marge Bot
parent 3fde1c4242
commit 4cc3554d85
1 changed files with 3 additions and 1 deletions
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4
src/gallium/drivers/zink/zink_context.c
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@ -2059,7 +2059,9 @@ zink_set_sample_locations(struct pipe_context *pctx, size_t size, const uint8_t
ctx->sample_locations_changed = ctx->gfx_pipeline_state.sample_locations_enabled;
if (size > sizeof(ctx->sample_locations))
size = sizeof(ctx->sample_locations);
memcpy(ctx->sample_locations, locations, size);
if (locations)
memcpy(ctx->sample_locations, locations, size);
}
static VkAccessFlags