From: Al Viro Date: Sun, 6 Dec 2015 17:33:02 +0000 (-0500) Subject: Don't reset ->total_link_count on nested calls of vfs_path_lookup() X-Git-Tag: MMI-PSA29.97-13-9~8904^2 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2788cc47f4593cca2c3c73c7bb82cd32b88c8ef7;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git Don't reset ->total_link_count on nested calls of vfs_path_lookup() we already zero it on outermost set_nameidata(), so initialization in path_init() is pointless and wrong. The same DoS exists on pre-4.2 kernels, but there a slightly different fix will be needed. Cc: stable@vger.kernel.org # v4.2 Signed-off-by: Al Viro --- diff --git a/fs/namei.c b/fs/namei.c index d84d7c7515fc..0c3974cd3ecd 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1996,7 +1996,6 @@ static const char *path_init(struct nameidata *nd, unsigned flags) nd->last_type = LAST_ROOT; /* if there are only slashes... */ nd->flags = flags | LOOKUP_JUMPED | LOOKUP_PARENT; nd->depth = 0; - nd->total_link_count = 0; if (flags & LOOKUP_ROOT) { struct dentry *root = nd->root.dentry; struct inode *inode = root->d_inode;