linux-kernel - Re: [PATCH v4] pid_ns: Introduce ioctl to set vector of ns_last

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Message-ID: <201704291753.q3dMNEDp%fengguang.wu@intel.com>
Date:   Sat, 29 Apr 2017 17:17:04 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Kirill Tkhai <ktkhai@...tuozzo.com>
Cc:     kbuild-all@...org, serge@...lyn.com, ebiederm@...ssion.com,
        agruenba@...hat.com, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, oleg@...hat.com, paul@...l-moore.com,
        ktkhai@...tuozzo.com, viro@...iv.linux.org.uk, avagin@...nvz.org,
        linux-api@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        mtk.manpages@...il.com, akpm@...ux-foundation.org,
        luto@...capital.net, gorcunov@...nvz.org, mingo@...nel.org,
        keescook@...omium.org
Subject: Re: [PATCH v4] pid_ns: Introduce ioctl to set vector of
 ns_last_pid's on ns hierarhy

Hi Kirill,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.11-rc8 next-20170428]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Kirill-Tkhai/pid_ns-Introduce-ioctl-to-set-vector-of-ns_last_pid-s-on-ns-hierarhy/20170429-155011
config: i386-defconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   kernel/pid_namespace.c: In function 'pidns_set_last_pid_vec':
>> kernel/pid_namespace.c:450:38: error: 'pid_max' undeclared (first use in this function)
      if (!top || pid[i] < 0 || pid[i] > pid_max)
                                         ^~~~~~~
   kernel/pid_namespace.c:450:38: note: each undeclared identifier is reported only once for each function it appears in

vim +/pid_max +450 kernel/pid_namespace.c

   444		if (copy_from_user(pid, &vec->pid[0], nr * sizeof(pid_t)) != 0)
   445			return -EFAULT;
   446	
   447		top = pid_ns;
   448		for (i = 0; i < nr-1; i++) {
   449			top = top->parent;
 > 450			if (!top || pid[i] < 0 || pid[i] > pid_max)
   451				return -EINVAL;
   452		}
   453		if (!ns_capable(top->user_ns, CAP_SYS_ADMIN))

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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