4.19-stable review patch. If anyone has any objections, please let me know.
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From: Alex Deucher alexander.deucher@amd.com
commit 4d75b9468021c73108b4439794d69e892b1d24e3 upstream.
Avoid a possible buffer overflow if size is larger than 4K.
Reviewed-by: Yang Wang kevinyang.wang@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com (cherry picked from commit f5d873f5825b40d886d03bd2aede91d4cf002434) Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c @@ -394,7 +394,7 @@ static ssize_t amdgpu_debugfs_regs_smc_r if (!adev->smc_rreg) return -EOPNOTSUPP;
- if (size & 0x3 || *pos & 0x3) + if (size > 4096 || size & 0x3 || *pos & 0x3) return -EINVAL;
while (size) {