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| author | Peilin Ye <yepeilin.cs@gmail.com> | 2020-07-28 15:29:24 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-07-30 11:02:10 -0400 |
| commit | 543e8669ed9bfb30545fd52bc0e047ca4df7fb31 (patch) | |
| tree | e502dbbf069cf1c50d65f41cced3fbda1fe68345 /mm | |
| parent | a4a2739beb8933a19281bca077fdb852598803ed (diff) | |
drm/amdgpu: Prevent kernel-infoleak in amdgpu_info_ioctl()
Compiler leaves a 4-byte hole near the end of `dev_info`, causing
amdgpu_info_ioctl() to copy uninitialized kernel stack memory to userspace
when `size` is greater than 356.
In 2015 we tried to fix this issue by doing `= {};` on `dev_info`, which
unfortunately does not initialize that 4-byte hole. Fix it by using
memset() instead.
Cc: stable@vger.kernel.org
Fixes: c193fa91b918 ("drm/amdgpu: information leak in amdgpu_info_ioctl()")
Fixes: d38ceaf99ed0 ("drm/amdgpu: add core driver (v4)")
Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions