drivers/amd/pm: fix a use-after-free in kv_parse_power_table

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[ Upstream commit 28dd788382 ]

When ps allocated by kzalloc equals to NULL, kv_parse_power_table
frees adev->pm.dpm.ps that allocated before. However, after the control
flow goes through the following call chains:

kv_parse_power_table
  |-> kv_dpm_init
        |-> kv_dpm_sw_init
	      |-> kv_dpm_fini

The adev->pm.dpm.ps is used in the for loop of kv_dpm_fini after its
first free in kv_parse_power_table and causes a use-after-free bug.

Fixes: a2e73f56fa ("drm/amdgpu: Add support for CIK parts")
Signed-off-by: Zhipeng Lu <alexious@zju.edu.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Zhipeng Lu 2023-12-15 00:24:58 +08:00 • committed by Greg Kroah-Hartman

parent ca8e2e251c

commit 3426f059ea

1 changed files with 1 additions and 3 deletions

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drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c

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