diff options
author | Sagar Kamble <skamble@nvidia.com> | 2021-08-02 23:41:33 -0400 |
---|---|---|
committer | mobile promotions <svcmobile_promotions@nvidia.com> | 2021-08-03 14:39:44 -0400 |
commit | ce8548ec056022c4feccacc9eb09a4e8619bdefa (patch) | |
tree | aa419fc8b0287d85727854c8a98e87453dde7258 /drivers/gpu/nvgpu/common/pmu/pmu_ipc.c | |
parent | 2c441a83d44857b71a599acfe76395942ea936bf (diff) |
gpu: nvgpu: fix clk_arb completion file private data access race
clk_arb completion file descriptor can get closed immediately after
poll finishes in the work item gp10b_clk_arb_run_arbiter_cb. In
that case, the refcount for nvgpu_clk_dev can become zero in
the work item and can lead to invalid access while removing
nvgpu_clk_dev from the lists.
Remove nvgpu_clk_dev from the list before dropping the reference to
it.
Also, delete the nvgpu_clk_dev in completion file release handler
within the session and requests spinlocks to avoid race with
gp10b_clk_arb_run_arbiter_cb using it.
bug 200757277
Change-Id: I054eee547f2a6fa633d7ef55df216ec36647a826
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2569522
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Diffstat (limited to 'drivers/gpu/nvgpu/common/pmu/pmu_ipc.c')
0 files changed, 0 insertions, 0 deletions