diff options
| author | Miklos Szeredi <mszeredi@redhat.com> | 2019-11-12 11:49:04 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-21 10:34:48 +0100 |
| commit | c5653f92a02f9ce2b1d50565ad74b1e8881e59ce (patch) | |
| tree | ad8482538fd8c47c7a0d9982eee320290db50f2c /fs/fuse/dir.c | |
| parent | 49de4996f146c8584c0033af8b985039c97e2b66 (diff) | |
fuse: verify nlink
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>
Diffstat (limited to 'fs/fuse/dir.c')
| -rw-r--r-- | fs/fuse/dir.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 7d7081619f6e..f84477d1d741 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -812,7 +812,8 @@ static int fuse_link(struct dentry *entry, struct inode *newdir, spin_lock(&fc->lock); fi->attr_version = ++fc->attr_version; - inc_nlink(inode); + if (likely(inode->i_nlink < UINT_MAX)) + inc_nlink(inode); spin_unlock(&fc->lock); fuse_invalidate_attr(inode); fuse_update_ctime(inode); |