| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 33/77] drm/amdgpu: fix out of bounds write | Date | Mon, 1 Nov 2021 10:17:21 +0100 |
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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 @@ -264,7 +264,7 @@ 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)) {
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