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ovl: check snprintf return

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Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Miklos Szeredi 2017-07-27 21:54:05 +02:00
parent 520eccdfe1
commit 6787341a0f
1 changed files with 3 additions and 0 deletions
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3
fs/overlayfs/inode.c
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@ -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);
}