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(parent: dae0294) | patch
drm/amdgpu: Prevent shift wrapping in amdgpu_read_mask()
authorDan Carpenter <dan.carpenter@oracle.com>
Tue, 2 Feb 2021 05:56:36 +0000 (08:56 +0300)
committerAlex Deucher <alexander.deucher@amd.com>
Tue, 2 Feb 2021 17:12:55 +0000 (12:12 -0500)
commitdfccfed8f111611ab2388da1fcce851a4248d1a9
tree026abda0448ad3b1cf339c1587c00f83c20c4e39tree | snapshot
parentdae029490353cb957ff4efb6fdb38488cb2a7811commit | diff
drm/amdgpu: Prevent shift wrapping in amdgpu_read_mask()

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: c69bad879d91 ("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>
drivers/gpu/drm/amd/pm/amdgpu_pm.c diff | blob | history
Linux Kernel Source Tree.