Commit 703bf2d1 authored Apr 05, 2012 by Dave Jones Committed by Linus Torvalds Apr 05, 2012

fs/xattr.c: suppress page allocation failure warnings from sys_listxattr()

This size is user controllable, up to a maximum of XATTR_LIST_MAX (64k).
So it's trivial for someone to trigger a stream of order:4 page
allocation errors.

Signed-off-by: Dave Jones <davej@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Dave Chinner <david@fromorbit.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent b82c3287

fs/xattr.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -496,7 +496,7 @@ listxattr(struct dentry d, char __user list, size_t size)
		if (size) {
		if (size > XATTR_LIST_MAX)
		size = XATTR_LIST_MAX;
		klist = kmalloc(size, GFP_KERNEL);
		klist = kmalloc(size, __GFP_NOWARN \| GFP_KERNEL);
		if (!klist)
		return -ENOMEM;
		}