Commit 636f13c1 authored Feb 17, 2006 by Chris Wright Committed by Linus Torvalds Feb 17, 2006

[PATCH] sys_mbind sanity checking



Make sure maxnodes is safe size before calculating nlongs in
get_nodes().

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent 74910e6c

mm/mempolicy.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -808,6 +808,8 @@ static int get_nodes(nodemask_t nodes, const unsigned long __user nmask,
		nodes_clear(*nodes);
		if (maxnode == 0 \|\| !nmask)
		return 0;
		if (maxnode > PAGE_SIZE)
		return -EINVAL;

		nlongs = BITS_TO_LONGS(maxnode);
		if ((maxnode % BITS_PER_LONG) == 0)