Re: Oops with current linus' git tree

[Nick Piggin <nickpiggin@yahoo.com.au>]

Nick Piggin wrote:
> Diego Calleja wrote:
>
> > I'm having two noticeable problems with the current linus' tree
> >
> > 1) Oops while watching a DVD with kaffeine (kde based video player),
> >    oops pasted below.
>
>  From your oops it looks as though the radix_tree_lookup in find_get_page
> has returned 0x40. It could be a flipped bit - is your memory OK?
>
> Can you apply the attached patch and try to reproduce the oops?

Really attached now.

--
SUSE Labs, Novell Inc.

Index: linux-2.6/lib/radix-tree.c
===================================================================
--- linux-2.6.orig/lib/radix-tree.c	2006-01-03 19:05:57.000000000 +1100
+++ linux-2.6/lib/radix-tree.c	2006-01-17 15:17:36.000000000 +1100
@@ -233,6 +233,8 @@ int radix_tree_insert(struct radix_tree_
 	int offset;
 	int error;
 
+	BUG_ON((unsigned long)item < PAGE_OFFSET);
+
 	/* Make sure the tree is high enough.  */
 	if ((!index && !root->rnode) ||
 			index > radix_tree_maxindex(root->height)) {
@@ -334,6 +336,8 @@ void *radix_tree_lookup(struct radix_tre
 	void **slot;
 
 	slot = __lookup_slot(root, index);
+	if (slot && *slot)
+		BUG_ON((unsigned long)(*slot) < PAGE_OFFSET);
 	return slot != NULL ? *slot : NULL;
 }
 EXPORT_SYMBOL(radix_tree_lookup);