From: Miklos Szeredi mszeredi@redhat.com
commit c634da718db9b2fac201df2ae1b1b095344ce5eb upstream.
When adding a new hard link, make sure that i_nlink doesn't overflow.
Fixes: ac45d61357e8 ("fuse: fix nlink after unlink") Cc: stable@vger.kernel.org # v3.4 Signed-off-by: Miklos Szeredi mszeredi@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/fuse/dir.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -814,7 +814,8 @@ static int fuse_link(struct dentry *entr
spin_lock(&fi->lock); fi->attr_version = atomic64_inc_return(&fc->attr_version); - inc_nlink(inode); + if (likely(inode->i_nlink < UINT_MAX)) + inc_nlink(inode); spin_unlock(&fi->lock); fuse_invalidate_attr(inode); fuse_update_ctime(inode);