[Xen-devel] [PATCH] Null pointer dereference at free_vm_area() - Glauber de Oliveira Costa - com.xensource.lists.xen-devel

3 messages in com.xensource.lists.xen-devel[Xen-devel] [PATCH] Null pointer dere...

From	Sent On	Attachments
Glauber de Oliveira Costa	26 Dec 2005 07:58	.Other
Vincent Hanquez	27 Dec 2005 07:54
Glauber de Oliveira Costa	27 Dec 2005 08:17

Subject:	[Xen-devel] [PATCH] Null pointer dereference at free_vm_area()
From:	Glauber de Oliveira Costa (glom...@br.ibm.com)
Date:	12/26/2005 07:58:35 AM
List:	com.xensource.lists.xen-devel
Attachments:	free_return_null - 0.4k

Hi folks,

The free_vm_area() function may crash if it gets a NULL pointer as a parameter. I do think that the right behaviour should be returning in this case. This is, for example, the same behaviour of kfree(), and as alloc_vm_area() may also return NULL, it may lead to a more elegant alloc/free sequence in case of a fail.

In case you agree with that, a patch follows.