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| author | Miklos Szeredi <mszeredi@redhat.com> | 2019-11-12 13:49:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-13 10:52:35 +0300 |
| commit | 9f435a5e3f5f28e20a6b6cfc2301cf5310f6238a (patch) | |
| tree | a5038cdcac7b917543572b2ddf2028d5c35d1563 /fs | |
| parent | 742f2319cbd61d9a051f532ad8c83bb33b48f442 (diff) | |
| download | linux-9f435a5e3f5f28e20a6b6cfc2301cf5310f6238a.tar.xz | |
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')
| -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 e7a2a988533d..1df6a6f3d8fd 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -837,7 +837,8 @@ 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); |