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Avoid NULL deref in grub_device_open.

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* grub-core/kern/device.c (grub_device_open): Don't dereference
	a NULL pointer upon failed grub_env_get.
This commit is contained in:
Jim Meyering authored and Vladimir 'phcoder' Serbinenko committed 2011-06-23 18:08:53 +02:00
1 parent f7db6f4a55
commit 8a5d6919e1
2 files changed
+7 -1
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grub-core/kern/device.c
+1 -1
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@@ -35,7 +35,7 @@ grub_device_open (const char *name)
if (! name)
{
name = grub_env_get ("root");
if (*name == '\0')
if (name == NULL || *name == '\0')
{
grub_error (GRUB_ERR_BAD_DEVICE, "no device is set");
goto fail;