linux-kernel - [PATCH AUTOSEL 6.10 016/121] drm/amd/display: Add missing NULL pointer check within dpcd_extend_address

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Message-ID: <20240801000834.3930818-16-sashal@kernel.org>
Date: Wed, 31 Jul 2024 19:59:14 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Hersen Wu <hersenxs.wu@....com>,
	Alex Hung <alex.hung@....com>,
	Rodrigo Siqueira <rodrigo.siqueira@....com>,
	Tom Chung <chiahsuan.chung@....com>,
	Daniel Wheeler <daniel.wheeler@....com>,
	Alex Deucher <alexander.deucher@....com>,
	Sasha Levin <sashal@...nel.org>,
	harry.wentland@....com,
	sunpeng.li@....com,
	Rodrigo.Siqueira@....com,
	christian.koenig@....com,
	Xinhui.Pan@....com,
	airlied@...il.com,
	daniel@...ll.ch,
	srinivasan.shanmugam@....com,
	hamza.mahfooz@....com,
	lenko.donchev@...il.com,
	amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.10 016/121] drm/amd/display: Add missing NULL pointer check within dpcd_extend_address_range

From: Hersen Wu <hersenxs.wu@....com>

[ Upstream commit 5524fa301ba649f8cf00848f91468e0ba7e4f24c ]

[Why & How]
ASSERT if return NULL from kcalloc.

Reviewed-by: Alex Hung <alex.hung@....com>
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@....com>
Acked-by: Tom Chung <chiahsuan.chung@....com>
Signed-off-by: Hersen Wu <hersenxs.wu@....com>
Tested-by: Daniel Wheeler <daniel.wheeler@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/display/dc/link/protocols/link_dpcd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dpcd.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dpcd.c
index a72c898b64fab..584b9295a12af 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dpcd.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dpcd.c
@@ -165,6 +165,7 @@ static void dpcd_extend_address_range(
 		*out_address = new_addr_range.start;
 		*out_size = ADDRESS_RANGE_SIZE(new_addr_range.start, new_addr_range.end);
 		*out_data = kcalloc(*out_size, sizeof(**out_data), GFP_KERNEL);
+		ASSERT(*out_data);
 	}
 }
 
-- 
2.43.0