Commit 557411eb authored by Armin Kuster's avatar Armin Kuster Committed by Greg Kroah-Hartman
Browse files

Sysfs: fix possible memleak in sysfs_follow_link 



There is the possiblity of a memory leak if a page is allocated and if
sysfs_getlink() fails in the sysfs_follow_link.

Signed-off-by: default avatarArmin Kuster <akuster@mvista.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent b22813b3

fs/sysfs/symlink.c

+4 −1
Original line number Diff line number Diff line
@@ -192,8 +192,11 @@ static void *sysfs_follow_link(struct dentry *dentry, struct nameidata *nd) 
{

	int error = -ENOMEM;

	unsigned long page = get_zeroed_page(GFP_KERNEL);

	if (page)

	if (page) {

		error = sysfs_getlink(dentry, (char *) page); 

		if (error < 0)

			free_page((unsigned long)page);

	}

	nd_set_link(nd, error ? ERR_PTR(error) : (char *)page);

	return NULL;

}