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SubjectRe: linux-next: build failure after merge of the userns tree
Stephen Rothwell <sfr@canb.auug.org.au> writes:

> 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.

Thank you very much for catching that.

I am now quite embarrassed I did not catch that myself.

Eric

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