Commit 39caa091 authored Jun 07, 2012 by Joern Engel Committed by Linus Torvalds Jun 07, 2012

btree: catch NULL value before it does harm



Storing NULL values in the btree is illegal and can lead to memory
corruption and possible other fun as well.  Catch it on insert, instead
of waiting for the inevitable.

Signed-off-by: Joern Engel <joern@logfs.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent cbf8ae32

lib/btree.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -509,6 +509,7 @@ static int btree_insert_level(struct btree_head head, struct btree_geo geo,
		int btree_insert(struct btree_head head, struct btree_geo geo,
		unsigned long key, void val, gfp_t gfp)
		{
		BUG_ON(!val);
		return btree_insert_level(head, geo, key, val, 1, gfp);
		}
		EXPORT_SYMBOL_GPL(btree_insert);