linux-kernel - linux-next: build failure after merge of the userns tree

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Message-ID: <20211020144651.10321529@canb.auug.org.au>
Date:   Wed, 20 Oct 2021 14:46:51 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Yu Zhao <yuzhao@...gle.com>, Alexey Gladkov <legion@...nel.org>
Subject: linux-next: build failure after merge of the userns tree

Hi all,

After merging the userns tree, today's linux-next build (x86_64
allmodconfig) failed like this:

In file included from arch/x86/include/asm/bug.h:84,
                 from include/linux/bug.h:5,
                 from arch/x86/include/asm/paravirt.h:15,
                 from arch/x86/include/asm/irqflags.h:63,
                 from include/linux/irqflags.h:16,
                 from include/linux/rcupdate.h:26,
                 from include/linux/rculist.h:11,
                 from include/linux/pid.h:5,
                 from include/linux/sched.h:14,
                 from security/keys/process_keys.c:9:
security/keys/process_keys.c: In function 'key_change_session_keyring':
security/keys/process_keys.c:923:16: error: format '%s' expects a matching 'char *' argument [-Werror=format=]
  923 |   WARN_ONCE(1, "In %s get_ucounts failed\n");
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/asm-generic/bug.h:99:17: note: in definition of macro '__WARN_printf'
   99 |   __warn_printk(arg);     \
      |                 ^~~
include/linux/once_lite.h:19:4: note: in expansion of macro 'WARN'
   19 |    func(__VA_ARGS__);    \
      |    ^~~~
include/asm-generic/bug.h:150:2: note: in expansion of macro 'DO_ONCE_LITE_IF'
  150 |  DO_ONCE_LITE_IF(condition, WARN, 1, format)
      |  ^~~~~~~~~~~~~~~
security/keys/process_keys.c:923:3: note: in expansion of macro 'WARN_ONCE'
  923 |   WARN_ONCE(1, "In %s get_ucounts failed\n");
      |   ^~~~~~~~~
security/keys/process_keys.c:923:21: note: format string is defined here
  923 |   WARN_ONCE(1, "In %s get_ucounts failed\n");
      |                    ~^
      |                     |
      |                     char *
cc1: all warnings being treated as errors

Caused by commit

  346b5b4aa656 ("ucounts: Move get_ucounts from cred_alloc_blank to key_change_session_keyring")

I have used the userns tree from next-20211019 for today.

-- 
Cheers,
Stephen Rothwell

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