tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 999569d59a0aa2509ae4a67ecc266c1134e37e7b commit: f5b1a5d922d3199e0637349239b43aed6c7656b9 [12105/12116] mm/vmalloc: add __alloc_size attributes for better bounds checking config: i386-randconfig-a002-20200329 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=f5b1a5d922d3199e0637349239b43aed6c7656b9 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout f5b1a5d922d3199e0637349239b43aed6c7656b9 # save the attached .config to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/rapidio/devices/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:55, from include/linux/mm_types.h:9, from include/linux/buildid.h:5, from include/linux/module.h:14, from drivers/rapidio/devices/rio_mport_cdev.c:13: In function 'check_copy_size', inlined from 'copy_from_user' at include/linux/uaccess.h:191:6, inlined from 'rio_mport_transfer_ioctl' at drivers/rapidio/devices/rio_mport_cdev.c:983:6: >> include/linux/thread_info.h:213:4: error: call to '__bad_copy_to' declared with attribute error: copy destination size is too small 213 | __bad_copy_to(); | ^~~~~~~~~~~~~~~ vim +/__bad_copy_to +213 include/linux/thread_info.h b0377fedb6528087 Al Viro 2017-06-29 202 9dd819a15162f8f8 Kees Cook 2019-09-25 203 static __always_inline __must_check bool b0377fedb6528087 Al Viro 2017-06-29 204 check_copy_size(const void *addr, size_t bytes, bool is_source) b0377fedb6528087 Al Viro 2017-06-29 205 { 122b05c65c5d9cad Kees Cook 2021-06-17 206 int sz = __builtin_object_size(addr, 0); b0377fedb6528087 Al Viro 2017-06-29 207 if (unlikely(sz >= 0 && sz < bytes)) { b0377fedb6528087 Al Viro 2017-06-29 208 if (!__builtin_constant_p(bytes)) b0377fedb6528087 Al Viro 2017-06-29 209 copy_overflow(sz, bytes); b0377fedb6528087 Al Viro 2017-06-29 210 else if (is_source) b0377fedb6528087 Al Viro 2017-06-29 211 __bad_copy_from(); b0377fedb6528087 Al Viro 2017-06-29 212 else b0377fedb6528087 Al Viro 2017-06-29 @213 __bad_copy_to(); b0377fedb6528087 Al Viro 2017-06-29 214 return false; b0377fedb6528087 Al Viro 2017-06-29 215 } 6d13de1489b6bf53 Kees Cook 2019-12-04 216 if (WARN_ON_ONCE(bytes > INT_MAX)) 6d13de1489b6bf53 Kees Cook 2019-12-04 217 return false; b0377fedb6528087 Al Viro 2017-06-29 218 check_object_size(addr, bytes, is_source); b0377fedb6528087 Al Viro 2017-06-29 219 return true; b0377fedb6528087 Al Viro 2017-06-29 220 } b0377fedb6528087 Al Viro 2017-06-29 221 :::::: The code at line 213 was first introduced by commit :::::: b0377fedb6528087ed319b0d054d6ed82240372c copy_{to,from}_user(): consolidate object size checks :::::: TO: Al Viro <viro@xxxxxxxxxxxxxxxxxx> :::::: CC: Al Viro <viro@xxxxxxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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