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Message-ID: <20240801002107.3934037-24-sashal@kernel.org> Date: Wed, 31 Jul 2024 20:17:39 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Ma Jun <Jun.Ma2@....com>, Tim Huang <Tim.Huang@....com>, Alex Deucher <alexander.deucher@....com>, Sasha Levin <sashal@...nel.org>, christian.koenig@....com, Xinhui.Pan@....com, airlied@...il.com, daniel@...ll.ch, amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org Subject: [PATCH AUTOSEL 6.6 24/83] drm/amdgpu: Fix out-of-bounds read of df_v1_7_channel_number From: Ma Jun <Jun.Ma2@....com> [ Upstream commit d768394fa99467bcf2703bde74ddc96eeb0b71fa ] Check the fb_channel_number range to avoid the array out-of-bounds read error Signed-off-by: Ma Jun <Jun.Ma2@....com> Reviewed-by: Tim Huang <Tim.Huang@....com> Signed-off-by: Alex Deucher <alexander.deucher@....com> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/gpu/drm/amd/amdgpu/df_v1_7.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/df_v1_7.c b/drivers/gpu/drm/amd/amdgpu/df_v1_7.c index 5dfab80ffff21..cd298556f7a60 100644 --- a/drivers/gpu/drm/amd/amdgpu/df_v1_7.c +++ b/drivers/gpu/drm/amd/amdgpu/df_v1_7.c @@ -70,6 +70,8 @@ static u32 df_v1_7_get_hbm_channel_number(struct amdgpu_device *adev) int fb_channel_number; fb_channel_number = adev->df.funcs->get_fb_channel_number(adev); + if (fb_channel_number >= ARRAY_SIZE(df_v1_7_channel_number)) + fb_channel_number = 0; return df_v1_7_channel_number[fb_channel_number]; } -- 2.43.0
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