gpu: nvgpu: fix KASAN slab-out-of-bounds error

KASAN reports below slab-out-of-bounds error when accessing
gr->map_tiles since gr->map_tiles is allocated with wrong(small) size.

fixing it by passing correct size to nvgpu_kzalloc.

BUG: KASAN: slab-out-of-bounds in gr_gk20a_init_map_tiles+0x6f0/0x7b0 ...
....
BUG: KASAN: slab-out-of-bounds in gr_gk20a_zcull_init_hw+0x184/0x848 ...
...
BUG: KASAN: slab-out-of-bounds in gr_gk20a_setup_rop_mapping+0x108/0x1740 ...
...
BUG: KASAN: slab-out-of-bounds in gr_gk20a_setup_rop_mapping+0x108/0x1740 ...

Bug 1918671

Change-Id: I667ac80b20a3d8539ed3eaae6e0f98e91f917819
Signed-off-by: David Pu <dpu@nvidia.com>
Reviewed-on: http://git-master/r/1472491
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
index ac03c1e5..b2225dae 100644
--- a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
@@ -3770,7 +3770,7 @@ static int gr_gk20a_init_map_tiles(struct gk20a *g, struct gr_gk20a *gr)
         }
 
         if (gr->map_tiles == NULL) {
-                gr->map_tiles = nvgpu_kzalloc(g, num_gpcs * sizeof(u8));
+                gr->map_tiles = nvgpu_kzalloc(g, map_tile_count * sizeof(u8));
                 if (gr->map_tiles == NULL) {
                         ret = -ENOMEM;
                         goto clean_up;