[hch-misc:set_fs-coredump 5/8] arch/x86/kernel/signal.c:518:24: error: storage size of 'new' isn't known

[hch-misc:set_fs-coredump 5/8] arch/x86/kernel/signal.c:518:24: error: storage size of 'new' isn't known

[kbuild test robot]

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tree:   git://git.infradead.org/users/hch/misc.git set_fs-coredump
head:   cc7765485f732e2a0f36a0f9ec36cefacb010b8e
commit: 5ca642c4c744ce6460ebb91fe30ec7a064d28e96 [5/8] signal: factor copy_siginfo_to_external32 from copy_siginfo_to_user32
config: i386-allyesconfig (attached as .config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce:
        git checkout 5ca642c4c744ce6460ebb91fe30ec7a064d28e96
        # save the attached .config to linux build tree
        make ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   arch/x86/kernel/signal.c: In function '__copy_siginfo_to_user32':
>> arch/x86/kernel/signal.c:518:24: error: storage size of 'new' isn't known
     struct compat_siginfo new;
                           ^~~
>> arch/x86/kernel/signal.c:520:2: error: implicit declaration of function 'copy_siginfo_to_external32'; did you mean '__copy_siginfo_to_user32'? [-Werror=implicit-function-declaration]
     copy_siginfo_to_external32(&new, from);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~
     __copy_siginfo_to_user32
>> arch/x86/kernel/signal.c:525:36: error: invalid application of 'sizeof' to incomplete type 'struct compat_siginfo'
     if (copy_to_user(to, &new, sizeof(struct compat_siginfo)))
                                       ^~~~~~
   arch/x86/kernel/signal.c:518:24: warning: unused variable 'new' [-Wunused-variable]
     struct compat_siginfo new;
                           ^~~
   cc1: some warnings being treated as errors

vim +518 arch/x86/kernel/signal.c

   513	
   514	#ifdef CONFIG_ARCH_COPY_SIGINFO_TO_USER32
   515	int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
   516				     const struct kernel_siginfo *from, bool x32_ABI)
   517	{
 > 518		struct compat_siginfo new;
   519	
 > 520		copy_siginfo_to_external32(&new, from);
   521		if (x32_ABI && from->si_signo == SIGCHLD) {
   522			new._sifields._sigchld_x32._utime = from->si_utime;
   523			new._sifields._sigchld_x32._stime = from->si_stime;
   524		}
 > 525		if (copy_to_user(to, &new, sizeof(struct compat_siginfo)))
   526			return -EFAULT;
   527		return 0;
   528	}
   529	int copy_siginfo_to_user32(struct compat_siginfo __user *to,
   530				   const struct kernel_siginfo *from)
   531	{
   532		return __copy_siginfo_to_user32(to, from, in_x32_syscall());
   533	}
   534	#endif /* CONFIG_ARCH_COPY_SIGINFO_TO_USER32 */
   535	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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