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| author | Miklos Szeredi <mszeredi@redhat.com> | 2019-11-12 13:49:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-17 22:38:44 +0300 |
| commit | 2c48b0da2b514a715591c5ed3819c8ae828b06e6 (patch) | |
| tree | f6c14acc4b006d2e25fa245e2f370b5cd11be472 /fs/fuse | |
| parent | c294780a80b0fb2e92ab4e2fd584029ced994186 (diff) | |
| download | linux-2c48b0da2b514a715591c5ed3819c8ae828b06e6.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/fuse')
| -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 b79bba77652a..8f7039f5249d 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -830,7 +830,8 @@ 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); |