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| author |   Miklos Szeredi <mszeredi@redhat.com> | 2017-07-27 21:54:05 +0200 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2017-07-27 21:54:05 +0200 |
| commit | 6787341a0f15cc79b9dd4f1341df2f5f3ad3bff1 (patch) | |
| tree | a7ae1a9c2d583769360065817c840b7f533cac0a /fs/overlayfs | |
| parent | Linux 4.13-rc2 (diff) | |
| download | linux-dev-6787341a0f15cc79b9dd4f1341df2f5f3ad3bff1.tar.xz linux-dev-6787341a0f15cc79b9dd4f1341df2f5f3ad3bff1.zip | |
ovl: check snprintf return
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs')
| -rw-r--r-- | fs/overlayfs/inode.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index 5bc71642b226..aecaadc8f9e7 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -498,6 +498,9 @@ static int ovl_set_nlink_common(struct dentry *dentry, len = snprintf(buf, sizeof(buf), format, (int) (inode->i_nlink - realinode->i_nlink)); + if (WARN_ON(len >= sizeof(buf))) + return -EIO; + return ovl_do_setxattr(ovl_dentry_upper(dentry), OVL_XATTR_NLINK, buf, len, 0); } |