24 lines
807 B
Diff
24 lines
807 B
Diff
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From 06d1099d7f4cece7af7793ff68fabc08eb55935d Mon Sep 17 00:00:00 2001
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From: Jonas Karlman <jonas@kwiboo.se>
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Date: Wed, 14 Nov 2018 06:08:01 +0100
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Subject: [PATCH] drm: workaround for crash when trying to open render node
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---
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drivers/gpu/drm/drm_ioctl.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
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index 34757168ffaa..0914c886277f 100644
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--- a/drivers/gpu/drm/drm_ioctl.c
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+++ b/drivers/gpu/drm/drm_ioctl.c
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@@ -57,6 +57,9 @@ static int drm_getunique(struct drm_device *dev, void *data,
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struct drm_unique *u = data;
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struct drm_master *master = file_priv->master;
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+ if (!master)
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+ return -EINVAL;
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+
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if (u->unique_len >= master->unique_len) {
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if (copy_to_user(u->unique, master->unique, master->unique_len))
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return -EFAULT;
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