Commit 1322a7bc authored by Jesse Zhang's avatar Jesse Zhang Committed by Huang Xiaojia
Browse files

drm/amd/pm: fix the Out-of-bounds read warning 

stable inclusion
from stable-v5.10.226
commit 38e32a0d837443c91c4b615a067b976cfb925376
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/IARV5V
CVE: CVE-2024-46731

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=38e32a0d837443c91c4b615a067b976cfb925376



--------------------------------

[ Upstream commit 12c6967428a099bbba9dfd247bb4322a984fcc0b ]

using index i - 1U may beyond element index
for mc_data[] when i = 0.

Signed-off-by: default avatarJesse Zhang <Jesse.Zhang@amd.com>
Reviewed-by: default avatarTim Huang <Tim.Huang@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarHuang Xiaojia <huangxiaojia2@huawei.com>
parent a7aa2a7c

drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.c

+3 −2
Original line number Diff line number Diff line
@@ -73,6 +73,7 @@ static int atomctrl_retrieve_ac_timing( 
					j++;

				} else if ((table->mc_reg_address[i].uc_pre_reg_data &

							LOW_NIBBLE_MASK) == DATA_EQU_PREV) {

					if (i)

						table->mc_reg_table_entry[num_ranges].mc_data[i] =

							table->mc_reg_table_entry[num_ranges].mc_data[i-1];

				}