From: Ma Ke <make24@iscas.ac.cn>
To: kherbst@redhat.com, lyude@redhat.com, dakr@redhat.com,
airlied@gmail.com, daniel@ffwll.ch, make24@iscas.ac.cn
Cc: dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org,
linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: [PATCH] drm/nouveau/dispnv04: fix null pointer dereference in nv17_tv_get_ld_modes
Date: Tue, 25 Jun 2024 16:18:28 +0800 [thread overview]
Message-ID: <20240625081828.2620794-1-make24@iscas.ac.cn> (raw)
In nv17_tv_get_ld_modes(), the return value of drm_mode_duplicate() is
assigned to mode, which will lead to a possible NULL pointer dereference
on failure of drm_mode_duplicate(). Add a check to avoid npd.
Cc: stable@vger.kernel.org
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
---
drivers/gpu/drm/nouveau/dispnv04/tvnv17.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
index 670c9739e5e1..4a08e61f3336 100644
--- a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
+++ b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
@@ -209,6 +209,8 @@ static int nv17_tv_get_ld_modes(struct drm_encoder *encoder,
struct drm_display_mode *mode;
mode = drm_mode_duplicate(encoder->dev, tv_mode);
+ if (!mode)
+ continue;
mode->clock = tv_norm->tv_enc_mode.vrefresh *
mode->htotal / 1000 *
--
2.25.1
next reply other threads:[~2024-06-25 8:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-25 8:18 Ma Ke [this message]
2024-06-25 13:43 ` [PATCH] drm/nouveau/dispnv04: fix null pointer dereference in nv17_tv_get_ld_modes Markus Elfring
2024-06-25 14:30 ` Greg KH
2024-06-25 19:11 ` Lyude Paul
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