tree:
https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git set_fs-2
head: cb5b88c78bb9c229c93bf11ea66d622a3ba4bf2d
commit: 5c46fbe679aaca0b693101e743e46ba571403b7c [12/17] uaccess: fix type mismatch
warnings from access_ok()
config: mips-randconfig-s031-20220216
(
https://download.01.org/0day-ci/archive/20220216/202202161630.LUggdKp0-lk...)
compiler: mips-linux-gcc (GCC) 11.2.0
reproduce:
wget
https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-dirty
#
https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/commi...
git remote add arnd-playground
https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git
git fetch --no-tags arnd-playground set_fs-2
git checkout 5c46fbe679aaca0b693101e743e46ba571403b7c
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1
CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=mips SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
sparse warnings: (new ones prefixed by >>)
command-line: note: in included file:
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQUIRE redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_SEQ_CST redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQ_REL redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_RELEASE redefined
builtin:0:0: sparse: this was the original definition
> lib/test_lockup.c:422:13: sparse: sparse: incorrect type in
initializer (different address spaces) @@ expected char const *__gk_ptr @@ got
void [noderef] __user *ptr @@
lib/test_lockup.c:422:13: sparse: expected char
const *__gk_ptr
lib/test_lockup.c:422:13: sparse: got void [noderef] __user *ptr
> lib/test_lockup.c:423:13: sparse: sparse: incorrect type in
initializer (different address spaces) @@ expected char const *__gk_ptr @@ got
void [noderef] __user * @@
lib/test_lockup.c:423:13: sparse: expected char
const *__gk_ptr
lib/test_lockup.c:423:13: sparse: got void [noderef] __user *
lib/test_lockup.c:230:9: sparse: sparse: context imbalance in 'test_lock' -
wrong count at exit
lib/test_lockup.c:250:25: sparse: sparse: context imbalance in 'test_unlock' -
unexpected unlock
vim +422 lib/test_lockup.c
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 410
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 411 static bool test_kernel_ptr(unsigned
long addr, int size)
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 412 {
5c46fbe679aaca Arnd Bergmann 2022-02-14 413 void __user *ptr = (void __user
*)addr;
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 414 char buf;
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 415
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 416 if (!addr)
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 417 return false;
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 418
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 419 /* should be at least readable
kernel address */
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 420 if (access_ok(ptr, 1) ||
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 421 access_ok(ptr + size - 1, 1)
||
25f12ae45fc193 Christoph Hellwig 2020-06-17 @422 get_kernel_nofault(buf, ptr)
||
25f12ae45fc193 Christoph Hellwig 2020-06-17 @423 get_kernel_nofault(buf, ptr +
size - 1)) {
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 424 pr_err("invalid kernel ptr:
%#lx\n", addr);
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 425 return true;
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 426 }
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 427
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 428 return false;
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 429 }
30428ef5d1e8ca Konstantin Khlebnikov 2020-04-06 430
:::::: The code at line 422 was first introduced by commit
:::::: 25f12ae45fc1931a1dce3cc59f9989a9d87834b0 maccess: rename probe_kernel_address to
get_kernel_nofault
:::::: TO: Christoph Hellwig <hch(a)lst.de>
:::::: CC: Linus Torvalds <torvalds(a)linux-foundation.org>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org