linux-kernel - [PATCH] vmwgfx : Fix potential NULL pointer dereference in vmw_surface_define

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Message-ID: <CAEmQOhDAsSKkL2pofEWy_D_02uNG4=NE4hYi20etV7kF5OqfOw@mail.gmail.com>
Date:	Thu, 30 May 2013 11:55:45 +0200
From:	Jonathan Salwan <jonathan.salwan@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: [PATCH] vmwgfx : Fix potential NULL pointer dereference in vmw_surface_define_ioctl()

Hello,

In ./drivers/gpu/drm/vmwgfx/vmwgfx_surface.c line 735 isn't
'srf->sizes' but 'srf->offsets' which need to be checked.


diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
index 5828143..02da0ee 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
@@ -732,7 +732,7 @@ int vmw_surface_define_ioctl(struct drm_device
*dev, void *data,
        }
        srf->offsets = kmalloc(srf->num_sizes * sizeof(*srf->offsets),
                               GFP_KERNEL);
-       if (unlikely(srf->sizes == NULL)) {
+       if (unlikely(srf->offsets == NULL)) {
                ret = -ENOMEM;
                goto out_no_offsets;
        }


Regards,

--
Jonathan Salwan
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