From: Ma Ke <make24@iscas.ac.cn>
To: alexander.deucher@amd.com, christian.koenig@amd.com,
Xinhui.Pan@amd.com, airlied@gmail.com, daniel@ffwll.ch
Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org, Ma Ke <make24@iscas.ac.cn>
Subject: [PATCH] drm/radeon: fix null pointer dereference in radeon_add_common_modes
Date: Wed, 26 Jun 2024 10:56:40 +0800 [thread overview]
Message-ID: <20240626025640.2779322-1-make24@iscas.ac.cn> (raw)
In radeon_add_common_modes(), the return value of drm_cvt_mode() is
assigned to mode, which will lead to a possible NULL pointer dereference
on failure of drm_cvt_mode(). Add a check to avoid npd.
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
---
drivers/gpu/drm/radeon/radeon_connectors.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index b84b58926106..71ddc4672850 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -520,6 +520,8 @@ static void radeon_add_common_modes(struct drm_encoder *encoder, struct drm_conn
continue;
mode = drm_cvt_mode(dev, common_modes[i].w, common_modes[i].h, 60, false, false, false);
+ if (!mode)
+ continue;
drm_mode_probed_add(connector, mode);
}
}
--
2.25.1
next reply other threads:[~2024-06-26 2:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-26 2:56 Ma Ke [this message]
2024-06-26 12:00 ` Markus Elfring
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