nv-tegra-mirror/linux-nvgpu
1
0
Fork 0
mirror of git://nv-tegra.nvidia.com/linux-nvgpu.git synced 2025-12-24 10:34:43 +03:00
Code Issues Packages Projects Releases Wiki Activity

gpu: nvgpu: add speculative load barrier (ctrl IOCTLs)

Browse Source 
Data can be speculatively loaded from memory and stay in cache even
when bound check fails. This can lead to unintended information
disclosure via side-channel analysis.

To mitigate this problem insert a speculation barrier.

bug 2041355

Change-Id: I03fbc81c105632e788d8a0f97fb4e233d1124b49
Signed-off-by: Aparna Das <aparnad@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1652230
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Aparna Das
2018-02-05 12:36:11 -08:00
committed by mobile promotions
parent 9402f4165b
commit 2a9431bbe0
1 changed files with 2 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/nvgpu/gv11b/gr_gv11b.c
View File

@@ -956,6 +956,8 @@ int gr_gv11b_zbc_s_query_table(struct gk20a *g, struct gr_gk20a *gr,
nvgpu_err(g, "invalid zbc stencil table index");
return -EINVAL;
}
nvgpu_speculation_barrier();
query_params->depth = gr->zbc_s_tbl[index].stencil;
query_params->format = gr->zbc_s_tbl[index].format;
query_params->ref_cnt = gr->zbc_s_tbl[index].ref_cnt;