This is a note to let you know that I've just added the patch titled
drm/amd: Fix an out of bounds error in BIOS parser
to the 5.15-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:
drm-amd-fix-an-out-of-bounds-error-in-bios-parser.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b00563dae3bdcb096a2d772f522dfacb3db1e878
Author: Mario Limonciello <mario.limonciello@xxxxxxx>
Date: Thu Mar 23 14:07:06 2023 -0500
drm/amd: Fix an out of bounds error in BIOS parser
[ Upstream commit d116db180decec1b21bba31d2ff495ac4d8e1b83 ]
The array is hardcoded to 8 in atomfirmware.h, but firmware provides
a bigger one sometimes. Deferencing the larger array causes an out
of bounds error.
commit 4fc1ba4aa589 ("drm/amd/display: fix array index out of bound error
in bios parser") fixed some of this, but there are two other cases
not covered by it. Fix those as well.
Reported-by: erhard_f@xxxxxxxxxxx
Link: https://bugzilla.kernel.org/show_bug.cgi?id=214853
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2473
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
index 1d86fd5610c03..228f098e5d88f 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
@@ -406,11 +406,8 @@ static enum bp_result get_gpio_i2c_info(
info->i2c_slave_address = record->i2c_slave_addr;
/* TODO: check how to get register offset for en, Y, etc. */
- info->gpio_info.clk_a_register_index =
- le16_to_cpu(
- header->gpio_pin[table_index].data_a_reg_index);
- info->gpio_info.clk_a_shift =
- header->gpio_pin[table_index].gpio_bitshift;
+ info->gpio_info.clk_a_register_index = le16_to_cpu(pin->data_a_reg_index);
+ info->gpio_info.clk_a_shift = pin->gpio_bitshift;
return BP_RESULT_OK;
}
