11:26 p.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git
asm-generic-uaccess-5
head: 569f7cb1d4f50aa497092e533d9d4044f5a87b58
commit: 3a68cb1dbf65aa5c86ae185e5c51c5c26c31a54a [1/9] asm-generic/uaccess.h: remove
__strncpy_from_user/__strnlen_user
config: csky-defconfig (attached as .config)
compiler: csky-linux-gcc (GCC) 10.3.0
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/asm-generic.git/comm...
git remote add asm-generic
https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git
git fetch --no-tags asm-generic asm-generic-uaccess-5
git checkout 3a68cb1dbf65aa5c86ae185e5c51c5c26c31a54a
# save the attached .config to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir
ARCH=csky SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
Note: the asm-generic/asm-generic-uaccess-5 HEAD 569f7cb1d4f50aa497092e533d9d4044f5a87b58
builds fine.
It only hurts bisectibility.
All errors (new ones prefixed by >>):
In file included from arch/csky/include/asm/uaccess.h:219,
from include/linux/uaccess.h:11,
from arch/csky/lib/usercopy.c:4:
arch/csky/lib/usercopy.c: In function 'strnlen_user':
> arch/csky/lib/usercopy.c:221:17: error: 'src' undeclared
(first use in this function)
221 | if (!access_ok(src, 1))
| ^~~
include/asm-generic/uaccess.h:124:59: note: in definition of macro 'access_ok'
124 | #define access_ok(addr, size) __access_ok((unsigned long)(addr),(size))
| ^~~~
arch/csky/lib/usercopy.c:221:17: note: each undeclared identifier is reported only once
for each function it appears in
221 | if (!access_ok(src, 1))
| ^~~
include/asm-generic/uaccess.h:124:59: note: in definition of macro 'access_ok'
124 | #define access_ok(addr, size) __access_ok((unsigned long)(addr),(size))
| ^~~~
vim +/src +221 arch/csky/lib/usercopy.c
205
206 /*
207 * strnlen_user: - Get the size of a string in user space.
208 * @str: The string to measure.
209 * @n: The maximum valid length
210 *
211 * Get the size of a NUL-terminated string in user space.
212 *
213 * Returns the size of the string INCLUDING the terminating NUL.
214 * On exception, returns 0.
215 * If the string is too long, returns a value greater than @n.
216 */
217 long strnlen_user(const char *s, long n)
218 {
219 unsigned long res, tmp;
220
221 if (!access_ok(src, 1))
222 return -EFAULT;
223
224 __asm__ __volatile__(
225 " cmpnei %1, 0 \n"
226 " bf 3f \n"
227 "1: cmpnei %0, 0 \n"
228 " bf 3f \n"
229 "2: ldb %3, (%1, 0) \n"
230 " cmpnei %3, 0 \n"
231 " bf 3f \n"
232 " subi %0, 1 \n"
233 " addi %1, 1 \n"
234 " br 1b \n"
235 "3: subu %2, %0 \n"
236 " addi %2, 1 \n"
237 " br 5f \n"
238 "4: movi %0, 0 \n"
239 " br 5f \n"
240 ".section __ex_table, \"a\" \n"
241 ".align 2 \n"
242 ".long 2b, 4b \n"
243 ".previous \n"
244 "5: \n"
245 : "=r"(n), "=r"(s), "=r"(res), "=r"(tmp)
246 : "0"(n), "1"(s), "2"(n)
247 : "memory");
248
249 return res;
250 }
251 EXPORT_SYMBOL(strnlen_user);
252
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org