| From 5afa7898ab7a0ec9c28556a91df714bf3c2f725e Mon Sep 17 00:00:00 2001 |
| From: Thelford Williams <tdwilliamsiv@gmail.com> |
| Date: Wed, 13 Oct 2021 16:04:13 -0400 |
| Subject: drm/amdgpu: fix out of bounds write |
| |
| From: Thelford Williams <tdwilliamsiv@gmail.com> |
| |
| commit 5afa7898ab7a0ec9c28556a91df714bf3c2f725e upstream. |
| |
| Size can be any value and is user controlled resulting in overwriting the |
| 40 byte array wr_buf with an arbitrary length of data from buf. |
| |
| Signed-off-by: Thelford Williams <tdwilliamsiv@gmail.com> |
| Signed-off-by: Alex Deucher <alexander.deucher@amd.com> |
| Cc: stable@vger.kernel.org |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c |
| +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c |
| @@ -263,7 +263,7 @@ static ssize_t dp_link_settings_write(st |
| if (!wr_buf) |
| return -ENOSPC; |
| |
| - if (parse_write_buffer_into_params(wr_buf, size, |
| + if (parse_write_buffer_into_params(wr_buf, wr_buf_size, |
| (long *)param, buf, |
| max_param_num, |
| ¶m_nums)) { |
