linux-kernel - Re: [PATCH v19 1/4] Add flags option to get xattr method paired to __vfs

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Date:   Fri, 25 Mar 2022 12:02:06 +0100
From:   "Luca Weiss" <luca.weiss@...rphone.com>
To:     <dvander@...gle.com>
Cc:     <Luca.Boccassi@...rosoft.com>, <darrick.wong@...cle.com>,
        <dsterba@...e.com>, <hubcap@...ibond.com>, <jack@...e.cz>,
        <jlayton@...nel.org>, <kernel-team@...roid.com>,
        <linux-fsdevel@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-security-module@...r.kernel.org>,
        <linux-unionfs@...r.kernel.org>, <paulmoore@...rosoft.com>,
        <salyzyn@...roid.com>, <sds@...ho.nsa.gov>,
        <selinux@...r.kernel.org>
Subject: Re: [PATCH v19 1/4] Add flags option to get xattr method paired to
 __vfs_getxattr

Hi David,

this patch doesn't compile with CONFIG_SECURITY=n:

./include/linux/security.h: In function 'security_inode_need_killpriv':
./include/linux/security.h:893:40: error: passing argument 1 of 'cap_inode_need_killpriv' from incompatible pointer type [-Werror=incompatible-pointer-types]
  893 |         return cap_inode_need_killpriv(dentry);
      |                                        ^~~~~~
      |                                        |
      |                                        struct dentry *
./include/linux/security.h:153:52: note: expected 'struct user_namespace *' but argument is of type 'struct dentry *'
  153 | int cap_inode_need_killpriv(struct user_namespace *mnt_userns,
      |                             ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~

I applied the patch on linux-next tag next-20220318, but the relevant part
doesn't seem to have changed lately.

Regards
Luca