This is a note to let you know that I've just added the patch titled
amdgpu/pm: prevent array underflow in vega20_odn_edit_dpm_table()
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
amdgpu-pm-prevent-array-underflow-in-vega20_odn_edit.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 37184d3344763583f970bf73a399a650200ed246
Author: Dan Carpenter <error27@xxxxxxxxx>
Date: Tue Nov 15 15:56:57 2022 +0300
amdgpu/pm: prevent array underflow in vega20_odn_edit_dpm_table()
[ Upstream commit d27252b5706e51188aed7647126e44dcf9e940c1 ]
In the PP_OD_EDIT_VDDC_CURVE case the "input_index" variable is capped at
2 but not checked for negative values so it results in an out of bounds
read. This value comes from the user via sysfs.
Fixes: d5bf26539494 ("drm/amd/powerplay: added vega20 overdrive support V3")
Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
index 947e4fa3c5e6..d499add3601a 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
@@ -2894,7 +2894,8 @@ static int vega20_odn_edit_dpm_table(struct pp_hwmgr *hwmgr,
data->od8_settings.od8_settings_array;
OverDriveTable_t *od_table =
&(data->smc_state_table.overdrive_table);
- int32_t input_index, input_clk, input_vol, i;
+ int32_t input_clk, input_vol, i;
+ uint32_t input_index;
int od8_id;
int ret;
