Messages in this thread | | | Date | Wed, 21 Jul 2021 03:50:33 +0800 | From | kernel test robot <> | Subject | [arnd-playground:asm-generic-uaccess-4 1/7] arch/um/kernel/skas/uaccess.c:211:15: error: '__strncpy_from_user' undeclared here (not in a function); did you mean 'strncpy_from_user'? |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git asm-generic-uaccess-4 head: d7d80410412f516869e09904cffd817acaeec742 commit: d6c30cddd046b12ea68ec67c50bac29cae3da28c [1/7] asm-generic/uaccess.h: remove __strncpy_from_user/__strnlen_user config: um-x86_64_defconfig (attached as .config) compiler: gcc-10 (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/commit/?id=d6c30cddd046b12ea68ec67c50bac29cae3da28c git remote add arnd-playground https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git git fetch --no-tags arnd-playground asm-generic-uaccess-4 git checkout d6c30cddd046b12ea68ec67c50bac29cae3da28c # save the attached .config to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=um SUBARCH=x86_64 SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All error/warnings (new ones prefixed by >>):
In file included from include/linux/linkage.h:7, from include/linux/fs.h:5, from include/linux/highmem.h:5, from arch/um/kernel/skas/uaccess.c:7: >> arch/um/kernel/skas/uaccess.c:211:15: error: '__strncpy_from_user' undeclared here (not in a function); did you mean 'strncpy_from_user'? 211 | EXPORT_SYMBOL(__strncpy_from_user); | ^~~~~~~~~~~~~~~~~~~ include/linux/export.h:98:16: note: in definition of macro '___EXPORT_SYMBOL' 98 | extern typeof(sym) sym; \ | ^~~ include/linux/export.h:160:34: note: in expansion of macro '__EXPORT_SYMBOL' 160 | #define _EXPORT_SYMBOL(sym, sec) __EXPORT_SYMBOL(sym, sec, "") | ^~~~~~~~~~~~~~~ include/linux/export.h:163:29: note: in expansion of macro '_EXPORT_SYMBOL' 163 | #define EXPORT_SYMBOL(sym) _EXPORT_SYMBOL(sym, "") | ^~~~~~~~~~~~~~ arch/um/kernel/skas/uaccess.c:211:1: note: in expansion of macro 'EXPORT_SYMBOL' 211 | EXPORT_SYMBOL(__strncpy_from_user); | ^~~~~~~~~~~~~ >> arch/um/kernel/skas/uaccess.c:242:6: warning: no previous prototype for '__strnlen_user' [-Wmissing-prototypes] 242 | long __strnlen_user(const void __user *str, long len) | ^~~~~~~~~~~~~~
vim +211 arch/um/kernel/skas/uaccess.c
^1da177e4c3f41 Linus Torvalds 2005-04-16 191 d6c30cddd046b1 Arnd Bergmann 2020-01-16 192 long strncpy_from_user(char *dst, const char __user *src, long count) ^1da177e4c3f41 Linus Torvalds 2005-04-16 193 { f8d65d27e677da Richard Weinberger 2015-05-12 194 long n; ^1da177e4c3f41 Linus Torvalds 2005-04-16 195 char *ptr = dst; ^1da177e4c3f41 Linus Torvalds 2005-04-16 196 d6c30cddd046b1 Arnd Bergmann 2020-01-16 197 if (!access_ok(src, 1)) d6c30cddd046b1 Arnd Bergmann 2020-01-16 198 return -EFAULT; d6c30cddd046b1 Arnd Bergmann 2020-01-16 199 db68ce10c4f0a2 Al Viro 2017-03-20 200 if (uaccess_kernel()) { ^1da177e4c3f41 Linus Torvalds 2005-04-16 201 strncpy(dst, (__force void *) src, count); 8ca842c4b5cbc7 Jeff Dike 2007-10-16 202 return strnlen(dst, count); ^1da177e4c3f41 Linus Torvalds 2005-04-16 203 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 204 ^1da177e4c3f41 Linus Torvalds 2005-04-16 205 n = buffer_op((unsigned long) src, count, 0, strncpy_chunk_from_user, ^1da177e4c3f41 Linus Torvalds 2005-04-16 206 &ptr); ^1da177e4c3f41 Linus Torvalds 2005-04-16 207 if (n != 0) 8ca842c4b5cbc7 Jeff Dike 2007-10-16 208 return -EFAULT; 8ca842c4b5cbc7 Jeff Dike 2007-10-16 209 return strnlen(dst, count); ^1da177e4c3f41 Linus Torvalds 2005-04-16 210 } f8d65d27e677da Richard Weinberger 2015-05-12 @211 EXPORT_SYMBOL(__strncpy_from_user); ^1da177e4c3f41 Linus Torvalds 2005-04-16 212 ^1da177e4c3f41 Linus Torvalds 2005-04-16 213 static int clear_chunk(unsigned long addr, int len, void *unused) ^1da177e4c3f41 Linus Torvalds 2005-04-16 214 { ^1da177e4c3f41 Linus Torvalds 2005-04-16 215 memset((void *) addr, 0, len); 8ca842c4b5cbc7 Jeff Dike 2007-10-16 216 return 0; ^1da177e4c3f41 Linus Torvalds 2005-04-16 217 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 218 f8d65d27e677da Richard Weinberger 2015-05-12 219 unsigned long __clear_user(void __user *mem, unsigned long len) ^1da177e4c3f41 Linus Torvalds 2005-04-16 220 { db68ce10c4f0a2 Al Viro 2017-03-20 221 if (uaccess_kernel()) { ^1da177e4c3f41 Linus Torvalds 2005-04-16 222 memset((__force void*)mem, 0, len); 8ca842c4b5cbc7 Jeff Dike 2007-10-16 223 return 0; ^1da177e4c3f41 Linus Torvalds 2005-04-16 224 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 225 f8d65d27e677da Richard Weinberger 2015-05-12 226 return buffer_op((unsigned long) mem, len, 1, clear_chunk, NULL); ^1da177e4c3f41 Linus Torvalds 2005-04-16 227 } f8d65d27e677da Richard Weinberger 2015-05-12 228 EXPORT_SYMBOL(__clear_user); ^1da177e4c3f41 Linus Torvalds 2005-04-16 229 ^1da177e4c3f41 Linus Torvalds 2005-04-16 230 static int strnlen_chunk(unsigned long str, int len, void *arg) ^1da177e4c3f41 Linus Torvalds 2005-04-16 231 { ^1da177e4c3f41 Linus Torvalds 2005-04-16 232 int *len_ptr = arg, n; ^1da177e4c3f41 Linus Torvalds 2005-04-16 233 ^1da177e4c3f41 Linus Torvalds 2005-04-16 234 n = strnlen((void *) str, len); ^1da177e4c3f41 Linus Torvalds 2005-04-16 235 *len_ptr += n; ^1da177e4c3f41 Linus Torvalds 2005-04-16 236 ^1da177e4c3f41 Linus Torvalds 2005-04-16 237 if (n < len) 8ca842c4b5cbc7 Jeff Dike 2007-10-16 238 return 1; 8ca842c4b5cbc7 Jeff Dike 2007-10-16 239 return 0; ^1da177e4c3f41 Linus Torvalds 2005-04-16 240 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 241 f8d65d27e677da Richard Weinberger 2015-05-12 @242 long __strnlen_user(const void __user *str, long len) ^1da177e4c3f41 Linus Torvalds 2005-04-16 243 { ^1da177e4c3f41 Linus Torvalds 2005-04-16 244 int count = 0, n; ^1da177e4c3f41 Linus Torvalds 2005-04-16 245 db68ce10c4f0a2 Al Viro 2017-03-20 246 if (uaccess_kernel()) 8ca842c4b5cbc7 Jeff Dike 2007-10-16 247 return strnlen((__force char*)str, len) + 1; ^1da177e4c3f41 Linus Torvalds 2005-04-16 248 ^1da177e4c3f41 Linus Torvalds 2005-04-16 249 n = buffer_op((unsigned long) str, len, 0, strnlen_chunk, &count); ^1da177e4c3f41 Linus Torvalds 2005-04-16 250 if (n == 0) 8ca842c4b5cbc7 Jeff Dike 2007-10-16 251 return count + 1; 3179ce7254ffa4 Richard Weinberger 2013-05-11 252 return 0; ^1da177e4c3f41 Linus Torvalds 2005-04-16 253 } f8d65d27e677da Richard Weinberger 2015-05-12 254 EXPORT_SYMBOL(__strnlen_user); dd3035a21ba7cc Anton Ivanov 2021-03-12 255
:::::: The code at line 211 was first introduced by commit :::::: f8d65d27e677da0ce33de570e3068308a77ed2b1 um: Rework uaccess code
:::::: TO: Richard Weinberger <richard@nod.at> :::::: CC: Richard Weinberger <richard@nod.at>
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