From: kernel test robot <lkp@intel.com>
To: Kees Cook <keescook@chromium.org>
Cc: kbuild-all@lists.01.org,
Linux Memory Management List <linux-mm@kvack.org>,
Daniel Micay <danielmicay@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: [linux-next:master 12105/12116] include/linux/thread_info.h:213:4: error: call to '__bad_copy_to' declared with attribute error: copy destination size is too small
Date: Thu, 9 Sep 2021 11:49:55 +0800 [thread overview]
Message-ID: <202109091134.FHnRmRxu-lkp@intel.com> (raw)
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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@intel.com>
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@zeniv.linux.org.uk>
:::::: CC: Al Viro <viro@zeniv.linux.org.uk>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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next reply other threads:[~2021-09-09 3:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-09 3:49 kernel test robot [this message]
2021-09-09 15:45 ` [linux-next:master 12105/12116] include/linux/thread_info.h:213:4: error: call to '__bad_copy_to' declared with attribute error: copy destination size is too small Kees Cook
2021-09-09 15:53 ` Kees Cook
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