[kas:lam 6/10] arch/x86/mm/fault.c:152:29: sparse: sparse: incorrect type in initializer (different address spaces)

From: kernel test robot
Date: Thu Apr 28 2022 - 14:50:01 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git lam
head: 956305b67dd062e5a58c68c871dee2ee1d579feb
commit: 2d7493c0421d267a906653b33aca69bf87f0595f [6/10] x86/uaccess: Remove tags from the address before checking
config: i386-randconfig-s001 (https://download.01.org/0day-ci/archive/20220429/202204290236.XX6P9C4v-lkp@xxxxxxxxx/config)
compiler: gcc-11 (Debian 11.2.0-20) 11.2.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git/commit/?id=2d7493c0421d267a906653b33aca69bf87f0595f
git remote add kas https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git
git fetch --no-tags kas lam
git checkout 2d7493c0421d267a906653b33aca69bf87f0595f
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash arch/x86/mm/ kernel/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

sparse warnings: (new ones prefixed by >>)
>> arch/x86/mm/fault.c:152:29: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned char [noderef] __user *__ptr_clean @@ got unsigned char *[assigned] instr @@
arch/x86/mm/fault.c:152:29: sparse: expected unsigned char [noderef] __user *__ptr_clean
arch/x86/mm/fault.c:152:29: sparse: got unsigned char *[assigned] instr
--
kernel/signal.c: note: in included file (through arch/x86/include/uapi/asm/signal.h, arch/x86/include/asm/signal.h, include/uapi/linux/signal.h, ...):
include/uapi/asm-generic/signal-defs.h:83:29: sparse: sparse: multiple address spaces given
kernel/signal.c:195:31: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:195:31: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:195:31: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:198:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:198:33: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:198:33: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:480:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:480:9: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:480:9: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:484:34: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:484:34: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:484:34: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:517:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:517:9: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:517:9: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:520:36: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:520:36: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:520:36: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:542:53: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct k_sigaction *ka @@ got struct k_sigaction [noderef] __rcu * @@
kernel/signal.c:542:53: sparse: expected struct k_sigaction *ka
kernel/signal.c:542:53: sparse: got struct k_sigaction [noderef] __rcu *
include/uapi/asm-generic/signal-defs.h:83:29: sparse: sparse: multiple address spaces given
kernel/signal.c:698:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:698:33: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:698:33: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:700:31: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:700:31: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:700:31: sparse: got struct spinlock [noderef] __rcu *
>> kernel/signal.c:1263:29: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned char [noderef] __user *__ptr_clean @@ got unsigned char * @@
kernel/signal.c:1263:29: sparse: expected unsigned char [noderef] __user *__ptr_clean
kernel/signal.c:1263:29: sparse: got unsigned char *
kernel/signal.c:1330:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:1330:9: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:1330:9: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:1331:16: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct k_sigaction *action @@ got struct k_sigaction [noderef] __rcu * @@
kernel/signal.c:1331:16: sparse: expected struct k_sigaction *action
kernel/signal.c:1331:16: sparse: got struct k_sigaction [noderef] __rcu *
kernel/signal.c:1351:34: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:1351:34: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:1351:34: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:1929:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:1929:36: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:1929:36: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:2039:44: sparse: sparse: cast removes address space '__rcu' of expression
kernel/signal.c:2058:65: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *tsk @@ got struct task_struct [noderef] __rcu *parent @@
kernel/signal.c:2058:65: sparse: expected struct task_struct *tsk
kernel/signal.c:2058:65: sparse: got struct task_struct [noderef] __rcu *parent
kernel/signal.c:2059:40: sparse: sparse: cast removes address space '__rcu' of expression
kernel/signal.c:2077:14: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sighand_struct *psig @@ got struct sighand_struct [noderef] __rcu *[noderef] __rcu sighand @@
kernel/signal.c:2077:14: sparse: expected struct sighand_struct *psig
kernel/signal.c:2077:14: sparse: got struct sighand_struct [noderef] __rcu *[noderef] __rcu sighand
kernel/signal.c:2106:46: sparse: sparse: incorrect type in argument 3 (different address spaces) @@ expected struct task_struct *t @@ got struct task_struct [noderef] __rcu *parent @@
kernel/signal.c:2106:46: sparse: expected struct task_struct *t
kernel/signal.c:2106:46: sparse: got struct task_struct [noderef] __rcu *parent
kernel/signal.c:2107:34: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct task_struct *parent @@ got struct task_struct [noderef] __rcu *parent @@
kernel/signal.c:2107:34: sparse: expected struct task_struct *parent
kernel/signal.c:2107:34: sparse: got struct task_struct [noderef] __rcu *parent
kernel/signal.c:2136:24: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *parent @@ got struct task_struct [noderef] __rcu *parent @@
kernel/signal.c:2136:24: sparse: expected struct task_struct *parent
kernel/signal.c:2136:24: sparse: got struct task_struct [noderef] __rcu *parent
kernel/signal.c:2139:24: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *parent @@ got struct task_struct [noderef] __rcu *real_parent @@
kernel/signal.c:2139:24: sparse: expected struct task_struct *parent
kernel/signal.c:2139:24: sparse: got struct task_struct [noderef] __rcu *real_parent
kernel/signal.c:2172:17: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sighand_struct *sighand @@ got struct sighand_struct [noderef] __rcu *sighand @@
kernel/signal.c:2172:17: sparse: expected struct sighand_struct *sighand
kernel/signal.c:2172:17: sparse: got struct sighand_struct [noderef] __rcu *sighand
kernel/signal.c:2213:41: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:2213:41: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:2213:41: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:2215:39: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:2215:39: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:2215:39: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:2266:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:2266:33: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:2266:33: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:2322:31: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:2322:31: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:2322:31: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:2363:31: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:2363:31: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:2363:31: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:2365:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:2365:33: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:2365:33: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:2464:41: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:2464:41: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:2464:41: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:2548:41: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:2548:41: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:2548:41: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:2560:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:2560:33: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:2560:33: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:2595:52: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *tsk @@ got struct task_struct [noderef] __rcu *parent @@
kernel/signal.c:2595:52: sparse: expected struct task_struct *tsk
kernel/signal.c:2595:52: sparse: got struct task_struct [noderef] __rcu *parent
kernel/signal.c:2597:49: sparse: sparse: cast removes address space '__rcu' of expression
kernel/signal.c:2635:49: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct sighand_struct *sighand @@ got struct sighand_struct [noderef] __rcu *sighand @@
kernel/signal.c:2635:49: sparse: expected struct sighand_struct *sighand
kernel/signal.c:2635:49: sparse: got struct sighand_struct [noderef] __rcu *sighand
kernel/signal.c:2964:27: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:2964:27: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:2964:27: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:2984:29: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:2984:29: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:2984:29: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:3051:27: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:3051:27: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:3051:27: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:3053:29: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:3053:29: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:3053:29: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:3204:31: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:3204:31: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:3204:31: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:3207:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:3207:33: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:3207:33: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:3594:27: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:3594:27: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:3594:27: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:3606:37: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:3606:37: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:3606:37: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:3611:35: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:3611:35: sparse: expected struct spinlock [usertype] *lock
kernel/signal.c:3611:35: sparse: got struct spinlock [noderef] __rcu *
kernel/signal.c:3616:29: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
kernel/signal.c:3616:29: sparse: expected struct spinlock [usertype] *lock

vim +152 arch/x86/mm/fault.c

d24df8ecf9b6f8 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 119
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 120 static int
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 121 is_prefetch(struct pt_regs *regs, unsigned long error_code, unsigned long addr)
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 122 {
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 123 unsigned char *max_instr;
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 124 unsigned char *instr;
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 125 int prefetch = 0;
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 126
d24df8ecf9b6f8 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 127 /* Erratum #91 affects AMD K8, pre-NPT CPUs */
d24df8ecf9b6f8 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 128 if (!is_amd_k8_pre_npt())
d24df8ecf9b6f8 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 129 return 0;
d24df8ecf9b6f8 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 130
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 131 /*
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 132 * If it was a exec (instruction fetch) fault on NX page, then
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 133 * do not ignore the fault:
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 134 */
1067f030994c69 arch/x86/mm/fault.c Ricardo Neri 2017-10-27 135 if (error_code & X86_PF_INSTR)
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 136 return 0;
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 137
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 138 instr = (void *)convert_ip_to_linear(current, regs);
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 139 max_instr = instr + 15;
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 140
35f1c89b0cce24 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 141 /*
35f1c89b0cce24 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 142 * This code has historically always bailed out if IP points to a
35f1c89b0cce24 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 143 * not-present page (e.g. due to a race). No one has ever
35f1c89b0cce24 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 144 * complained about this.
35f1c89b0cce24 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 145 */
35f1c89b0cce24 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 146 pagefault_disable();
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 147
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 148 while (instr < max_instr) {
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 149 unsigned char opcode;
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 150
35f1c89b0cce24 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 151 if (user_mode(regs)) {
35f1c89b0cce24 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 @152 if (get_user(opcode, instr))
35f1c89b0cce24 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 153 break;
35f1c89b0cce24 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 154 } else {
25f12ae45fc193 arch/x86/mm/fault.c Christoph Hellwig 2020-06-17 155 if (get_kernel_nofault(opcode, instr))
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 156 break;
35f1c89b0cce24 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 157 }
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 158
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 159 instr++;
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 160
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 161 if (!check_prefetch_opcode(regs, instr, opcode, &prefetch))
107a03678cac0d arch/x86/mm/fault.c Ingo Molnar 2009-02-20 162 break;
^1da177e4c3f41 arch/x86_64/mm/fault.c Linus Torvalds 2005-04-16 163 }
35f1c89b0cce24 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 164
35f1c89b0cce24 arch/x86/mm/fault.c Andy Lutomirski 2021-02-09 165 pagefault_enable();
^1da177e4c3f41 arch/x86_64/mm/fault.c Linus Torvalds 2005-04-16 166 return prefetch;
^1da177e4c3f41 arch/x86_64/mm/fault.c Linus Torvalds 2005-04-16 167 }
^1da177e4c3f41 arch/x86_64/mm/fault.c Linus Torvalds 2005-04-16 168

:::::: The code at line 152 was first introduced by commit
:::::: 35f1c89b0cce247bf0213df243ed902989b1dcda x86/fault: Fix AMD erratum #91 errata fixup for user code

:::::: TO: Andy Lutomirski <luto@xxxxxxxxxx>
:::::: CC: Borislav Petkov <bp@xxxxxxx>

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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