5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alex Deucher <alexander.deucher@xxxxxxx>
commit 4d75b9468021c73108b4439794d69e892b1d24e3 upstream.
Avoid a possible buffer overflow if size is larger than 4K.
Reviewed-by: Yang Wang <kevinyang.wang@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
(cherry picked from commit f5d873f5825b40d886d03bd2aede91d4cf002434)
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -395,7 +395,7 @@ 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) {
