* [arnd-playground:generic-uaccess 4/5] lib/strncpy_from_user.c:123:13: error: implicit declaration of function 'user_addr_max'
@ 2021-02-12 23:28 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-02-12 23:28 UTC (permalink / raw)
To: kbuild-all
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git generic-uaccess
head: 7731bf9d8dc1468d45db173cbe49cbe19c39a4a7
commit: 04e17803c96bb95527da87c2cfbac2f7cb6d697f [4/5] asm-generic: uaccess: use generic uaccess on m68k, h8300 and riscv
config: h8300-allyesconfig (attached as .config)
compiler: h8300-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/commit/?id=04e17803c96bb95527da87c2cfbac2f7cb6d697f
git remote add arnd-playground https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git
git fetch --no-tags arnd-playground generic-uaccess
git checkout 04e17803c96bb95527da87c2cfbac2f7cb6d697f
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=h8300
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
lib/strncpy_from_user.c: In function 'strncpy_from_user':
>> lib/strncpy_from_user.c:123:13: error: implicit declaration of function 'user_addr_max' [-Werror=implicit-function-declaration]
123 | max_addr = user_addr_max();
| ^~~~~~~~~~~~~
cc1: some warnings being treated as errors
--
lib/strnlen_user.c: In function 'strnlen_user':
>> lib/strnlen_user.c:99:13: error: implicit declaration of function 'user_addr_max' [-Werror=implicit-function-declaration]
99 | max_addr = user_addr_max();
| ^~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +/user_addr_max +123 lib/strncpy_from_user.c
2922585b93294d David S. Miller 2012-05-24 94
2922585b93294d David S. Miller 2012-05-24 95 /**
2922585b93294d David S. Miller 2012-05-24 96 * strncpy_from_user: - Copy a NUL terminated string from userspace.
2922585b93294d David S. Miller 2012-05-24 97 * @dst: Destination address, in kernel space. This buffer must be at
2922585b93294d David S. Miller 2012-05-24 98 * least @count bytes long.
2922585b93294d David S. Miller 2012-05-24 99 * @src: Source address, in user space.
2922585b93294d David S. Miller 2012-05-24 100 * @count: Maximum number of bytes to copy, including the trailing NUL.
2922585b93294d David S. Miller 2012-05-24 101 *
2922585b93294d David S. Miller 2012-05-24 102 * Copies a NUL-terminated string from userspace to kernel space.
2922585b93294d David S. Miller 2012-05-24 103 *
2922585b93294d David S. Miller 2012-05-24 104 * On success, returns the length of the string (not including the trailing
2922585b93294d David S. Miller 2012-05-24 105 * NUL).
2922585b93294d David S. Miller 2012-05-24 106 *
2922585b93294d David S. Miller 2012-05-24 107 * If access to userspace fails, returns -EFAULT (some data may have been
2922585b93294d David S. Miller 2012-05-24 108 * copied).
2922585b93294d David S. Miller 2012-05-24 109 *
2922585b93294d David S. Miller 2012-05-24 110 * If @count is smaller than the length of the string, copies @count bytes
2922585b93294d David S. Miller 2012-05-24 111 * and returns @count.
2922585b93294d David S. Miller 2012-05-24 112 */
2922585b93294d David S. Miller 2012-05-24 113 long strncpy_from_user(char *dst, const char __user *src, long count)
2922585b93294d David S. Miller 2012-05-24 114 {
2922585b93294d David S. Miller 2012-05-24 115 unsigned long max_addr, src_addr;
2922585b93294d David S. Miller 2012-05-24 116
07887358993d48 KP Singh 2020-06-04 117 might_fault();
4d0e9df5e43dba Albert van der Linde 2020-10-15 118 if (should_fail_usercopy())
4d0e9df5e43dba Albert van der Linde 2020-10-15 119 return -EFAULT;
2922585b93294d David S. Miller 2012-05-24 120 if (unlikely(count <= 0))
2922585b93294d David S. Miller 2012-05-24 121 return 0;
2922585b93294d David S. Miller 2012-05-24 122
2922585b93294d David S. Miller 2012-05-24 @123 max_addr = user_addr_max();
:::::: The code@line 123 was first introduced by commit
:::::: 2922585b93294d47172a765115e0dbc1bfe1be19 lib: Sparc's strncpy_from_user is generic enough, move under lib/
:::::: TO: David S. Miller <davem@davemloft.net>
:::::: CC: David S. Miller <davem@davemloft.net>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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2021-02-12 23:28 [arnd-playground:generic-uaccess 4/5] lib/strncpy_from_user.c:123:13: error: implicit declaration of function 'user_addr_max' kernel test robot
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