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authorPeilin Ye <yepeilin.cs@gmail.com>2020-07-28 15:29:24 -0400
committerAlex Deucher <alexander.deucher@amd.com>2020-07-30 11:02:10 -0400
commit543e8669ed9bfb30545fd52bc0e047ca4df7fb31 (patch)
treee502dbbf069cf1c50d65f41cced3fbda1fe68345 /mm
parenta4a2739beb8933a19281bca077fdb852598803ed (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