drm/amdgpu: Prevent shift wrapping in amdgpu_read_mask()

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If the user passes a "level" value which is higher than 31 then that
leads to shift wrapping.  The undefined behavior will lead to a
syzkaller stack dump.

Fixes: 5632708f44 ("drm/amd/powerplay: add dpm force multiple levels on cz/tonga/fiji/polaris (v2)")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Dan Carpenter 2021-02-02 08:56:36 +03:00 • committed by Alex Deucher

parent 4b1d6831b3

commit c915ef890d

1 changed files with 3 additions and 3 deletions

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drivers/gpu/drm/amd/pm/amdgpu_pm.c

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