8:28 p.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu.git for-next
head: ef03e4545eac3137f37604daef09019dd638b17e
commit: ef03e4545eac3137f37604daef09019dd638b17e [1/1] m68knommu: switch to using
asm-generic/uaccess.h
config: m68k-randconfig-s032-20200913 (attached as .config)
compiler: m68k-linux-gcc (GCC) 9.3.0
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: v0.6.2-191-g10164920-dirty
git checkout ef03e4545eac3137f37604daef09019dd638b17e
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1
CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=m68k
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 >>)
> arch/m68k/kernel/signal.c:923:16: sparse: sparse: incorrect type
in initializer (different address spaces) @@ expected char [noderef] __user *__x @@
got void * @@
> arch/m68k/kernel/signal.c:923:16: sparse: expected char [noderef] __user *__x
arch/m68k/kernel/signal.c:923:16: sparse: got void *
arch/m68k/kernel/signal.c:1007:16: sparse: sparse: incorrect type in initializer
(different address spaces) @@ expected char [noderef] __user *__x @@ got void *
@@
arch/m68k/kernel/signal.c:1007:16: sparse: expected char [noderef] __user *__x
arch/m68k/kernel/signal.c:1007:16: sparse: got void *
#
https://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu.git/commit...
git remote add m68knommu
https://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu.git
git fetch --no-tags m68knommu for-next
git checkout ef03e4545eac3137f37604daef09019dd638b17e
vim +923 arch/m68k/kernel/signal.c
0c22fafd312cd86 Greg Ungerer 2012-03-14 783
a95517992a37488 Greg Ungerer 2016-02-15 @784 asmlinkage int do_sigreturn(struct
pt_regs *regs, struct switch_stack *sw)
0c22fafd312cd86 Greg Ungerer 2012-03-14 785 {
0c22fafd312cd86 Greg Ungerer 2012-03-14 786 unsigned long usp = rdusp();
0c22fafd312cd86 Greg Ungerer 2012-03-14 787 struct sigframe __user *frame =
(struct sigframe __user *)(usp - 4);
0c22fafd312cd86 Greg Ungerer 2012-03-14 788 sigset_t set;
0c22fafd312cd86 Greg Ungerer 2012-03-14 789
96d4f267e40f950 Linus Torvalds 2019-01-03 790 if (!access_ok(frame,
sizeof(*frame)))
0c22fafd312cd86 Greg Ungerer 2012-03-14 791 goto badframe;
0c22fafd312cd86 Greg Ungerer 2012-03-14 792 if (__get_user(set.sig[0],
&frame->sc.sc_mask) ||
0c22fafd312cd86 Greg Ungerer 2012-03-14 793 (_NSIG_WORDS > 1 &&
0c22fafd312cd86 Greg Ungerer 2012-03-14 794
__copy_from_user(&set.sig[1], &frame->extramask,
0c22fafd312cd86 Greg Ungerer 2012-03-14 795
sizeof(frame->extramask))))
0c22fafd312cd86 Greg Ungerer 2012-03-14 796 goto badframe;
0c22fafd312cd86 Greg Ungerer 2012-03-14 797
43a35995562495b Matt Fleming 2012-05-11 798 set_current_blocked(&set);
0c22fafd312cd86 Greg Ungerer 2012-03-14 799
0c22fafd312cd86 Greg Ungerer 2012-03-14 800 if (restore_sigcontext(regs,
&frame->sc, frame + 1))
0c22fafd312cd86 Greg Ungerer 2012-03-14 801 goto badframe;
0c22fafd312cd86 Greg Ungerer 2012-03-14 802 return regs->d0;
0c22fafd312cd86 Greg Ungerer 2012-03-14 803
0c22fafd312cd86 Greg Ungerer 2012-03-14 804 badframe:
3cf5d076fb4d489 Eric W. Biederman 2019-05-23 805 force_sig(SIGSEGV);
0c22fafd312cd86 Greg Ungerer 2012-03-14 806 return 0;
0c22fafd312cd86 Greg Ungerer 2012-03-14 807 }
0c22fafd312cd86 Greg Ungerer 2012-03-14 808
a95517992a37488 Greg Ungerer 2016-02-15 809 asmlinkage int do_rt_sigreturn(struct
pt_regs *regs, struct switch_stack *sw)
0c22fafd312cd86 Greg Ungerer 2012-03-14 810 {
0c22fafd312cd86 Greg Ungerer 2012-03-14 811 unsigned long usp = rdusp();
0c22fafd312cd86 Greg Ungerer 2012-03-14 812 struct rt_sigframe __user *frame =
(struct rt_sigframe __user *)(usp - 4);
0c22fafd312cd86 Greg Ungerer 2012-03-14 813 sigset_t set;
0c22fafd312cd86 Greg Ungerer 2012-03-14 814
96d4f267e40f950 Linus Torvalds 2019-01-03 815 if (!access_ok(frame,
sizeof(*frame)))
0c22fafd312cd86 Greg Ungerer 2012-03-14 816 goto badframe;
0c22fafd312cd86 Greg Ungerer 2012-03-14 817 if (__copy_from_user(&set,
&frame->uc.uc_sigmask, sizeof(set)))
0c22fafd312cd86 Greg Ungerer 2012-03-14 818 goto badframe;
0c22fafd312cd86 Greg Ungerer 2012-03-14 819
43a35995562495b Matt Fleming 2012-05-11 820 set_current_blocked(&set);
0c22fafd312cd86 Greg Ungerer 2012-03-14 821
0c22fafd312cd86 Greg Ungerer 2012-03-14 822 if (rt_restore_ucontext(regs, sw,
&frame->uc))
0c22fafd312cd86 Greg Ungerer 2012-03-14 823 goto badframe;
0c22fafd312cd86 Greg Ungerer 2012-03-14 824 return regs->d0;
0c22fafd312cd86 Greg Ungerer 2012-03-14 825
0c22fafd312cd86 Greg Ungerer 2012-03-14 826 badframe:
3cf5d076fb4d489 Eric W. Biederman 2019-05-23 827 force_sig(SIGSEGV);
0c22fafd312cd86 Greg Ungerer 2012-03-14 828 return 0;
0c22fafd312cd86 Greg Ungerer 2012-03-14 829 }
0c22fafd312cd86 Greg Ungerer 2012-03-14 830
0c22fafd312cd86 Greg Ungerer 2012-03-14 831 static void setup_sigcontext(struct
sigcontext *sc, struct pt_regs *regs,
0c22fafd312cd86 Greg Ungerer 2012-03-14 832 unsigned long mask)
0c22fafd312cd86 Greg Ungerer 2012-03-14 833 {
0c22fafd312cd86 Greg Ungerer 2012-03-14 834 sc->sc_mask = mask;
0c22fafd312cd86 Greg Ungerer 2012-03-14 835 sc->sc_usp = rdusp();
0c22fafd312cd86 Greg Ungerer 2012-03-14 836 sc->sc_d0 = regs->d0;
0c22fafd312cd86 Greg Ungerer 2012-03-14 837 sc->sc_d1 = regs->d1;
0c22fafd312cd86 Greg Ungerer 2012-03-14 838 sc->sc_a0 = regs->a0;
0c22fafd312cd86 Greg Ungerer 2012-03-14 839 sc->sc_a1 = regs->a1;
0c22fafd312cd86 Greg Ungerer 2012-03-14 840 sc->sc_sr = regs->sr;
0c22fafd312cd86 Greg Ungerer 2012-03-14 841 sc->sc_pc = regs->pc;
0c22fafd312cd86 Greg Ungerer 2012-03-14 842 sc->sc_formatvec = regs->format
<< 12 | regs->vector;
0c22fafd312cd86 Greg Ungerer 2012-03-14 843 save_a5_state(sc, regs);
0c22fafd312cd86 Greg Ungerer 2012-03-14 844 save_fpu_state(sc, regs);
0c22fafd312cd86 Greg Ungerer 2012-03-14 845 }
0c22fafd312cd86 Greg Ungerer 2012-03-14 846
0c22fafd312cd86 Greg Ungerer 2012-03-14 847 static inline int
rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs *regs)
0c22fafd312cd86 Greg Ungerer 2012-03-14 848 {
0c22fafd312cd86 Greg Ungerer 2012-03-14 849 struct switch_stack *sw = (struct
switch_stack *)regs - 1;
0c22fafd312cd86 Greg Ungerer 2012-03-14 850 greg_t __user *gregs =
uc->uc_mcontext.gregs;
0c22fafd312cd86 Greg Ungerer 2012-03-14 851 int err = 0;
0c22fafd312cd86 Greg Ungerer 2012-03-14 852
0c22fafd312cd86 Greg Ungerer 2012-03-14 853 err |= __put_user(MCONTEXT_VERSION,
&uc->uc_mcontext.version);
0c22fafd312cd86 Greg Ungerer 2012-03-14 854 err |= __put_user(regs->d0,
&gregs[0]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 855 err |= __put_user(regs->d1,
&gregs[1]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 856 err |= __put_user(regs->d2,
&gregs[2]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 857 err |= __put_user(regs->d3,
&gregs[3]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 858 err |= __put_user(regs->d4,
&gregs[4]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 859 err |= __put_user(regs->d5,
&gregs[5]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 860 err |= __put_user(sw->d6,
&gregs[6]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 861 err |= __put_user(sw->d7,
&gregs[7]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 862 err |= __put_user(regs->a0,
&gregs[8]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 863 err |= __put_user(regs->a1,
&gregs[9]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 864 err |= __put_user(regs->a2,
&gregs[10]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 865 err |= __put_user(sw->a3,
&gregs[11]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 866 err |= __put_user(sw->a4,
&gregs[12]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 867 err |= __put_user(sw->a5,
&gregs[13]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 868 err |= __put_user(sw->a6,
&gregs[14]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 869 err |= __put_user(rdusp(),
&gregs[15]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 870 err |= __put_user(regs->pc,
&gregs[16]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 871 err |= __put_user(regs->sr,
&gregs[17]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 872 err |= __put_user((regs->format
<< 12) | regs->vector, &uc->uc_formatvec);
0c22fafd312cd86 Greg Ungerer 2012-03-14 873 err |= rt_save_fpu_state(uc, regs);
0c22fafd312cd86 Greg Ungerer 2012-03-14 874 return err;
0c22fafd312cd86 Greg Ungerer 2012-03-14 875 }
0c22fafd312cd86 Greg Ungerer 2012-03-14 876
0c22fafd312cd86 Greg Ungerer 2012-03-14 877 static inline void __user *
36992f2893d224a Richard Weinberger 2014-03-05 878 get_sigframe(struct ksignal *ksig,
size_t frame_size)
0c22fafd312cd86 Greg Ungerer 2012-03-14 879 {
36992f2893d224a Richard Weinberger 2014-03-05 880 unsigned long usp = sigsp(rdusp(),
ksig);
0c22fafd312cd86 Greg Ungerer 2012-03-14 881
0c22fafd312cd86 Greg Ungerer 2012-03-14 882 return (void __user *)((usp -
frame_size) & -8UL);
0c22fafd312cd86 Greg Ungerer 2012-03-14 883 }
0c22fafd312cd86 Greg Ungerer 2012-03-14 884
0d97500d3930126 Richard Weinberger 2013-10-07 885 static int setup_frame(struct ksignal
*ksig, sigset_t *set,
0d97500d3930126 Richard Weinberger 2013-10-07 886 struct pt_regs *regs)
0c22fafd312cd86 Greg Ungerer 2012-03-14 887 {
0c22fafd312cd86 Greg Ungerer 2012-03-14 888 struct sigframe __user *frame;
0c22fafd312cd86 Greg Ungerer 2012-03-14 889 int fsize =
frame_extra_sizes(regs->format);
0c22fafd312cd86 Greg Ungerer 2012-03-14 890 struct sigcontext context;
0d97500d3930126 Richard Weinberger 2013-10-07 891 int err = 0, sig = ksig->sig;
0c22fafd312cd86 Greg Ungerer 2012-03-14 892
0c22fafd312cd86 Greg Ungerer 2012-03-14 893 if (fsize < 0) {
7c79e1eef8c9a72 Geert Uytterhoeven 2016-12-06 894 pr_debug("setup_frame: Unknown
frame format %#x\n",
0c22fafd312cd86 Greg Ungerer 2012-03-14 895 regs->format);
0d97500d3930126 Richard Weinberger 2013-10-07 896 return -EFAULT;
0c22fafd312cd86 Greg Ungerer 2012-03-14 897 }
0c22fafd312cd86 Greg Ungerer 2012-03-14 898
36992f2893d224a Richard Weinberger 2014-03-05 899 frame = get_sigframe(ksig,
sizeof(*frame) + fsize);
0c22fafd312cd86 Greg Ungerer 2012-03-14 900
0c22fafd312cd86 Greg Ungerer 2012-03-14 901 if (fsize)
0c22fafd312cd86 Greg Ungerer 2012-03-14 902 err |= copy_to_user (frame + 1, regs
+ 1, fsize);
0c22fafd312cd86 Greg Ungerer 2012-03-14 903
a0075cd1cb79971 Richard Weinberger 2014-07-13 904 err |= __put_user(sig,
&frame->sig);
0c22fafd312cd86 Greg Ungerer 2012-03-14 905
0c22fafd312cd86 Greg Ungerer 2012-03-14 906 err |= __put_user(regs->vector,
&frame->code);
0c22fafd312cd86 Greg Ungerer 2012-03-14 907 err |= __put_user(&frame->sc,
&frame->psc);
0c22fafd312cd86 Greg Ungerer 2012-03-14 908
0c22fafd312cd86 Greg Ungerer 2012-03-14 909 if (_NSIG_WORDS > 1)
0c22fafd312cd86 Greg Ungerer 2012-03-14 910 err |=
copy_to_user(frame->extramask, &set->sig[1],
0c22fafd312cd86 Greg Ungerer 2012-03-14 911 sizeof(frame->extramask));
0c22fafd312cd86 Greg Ungerer 2012-03-14 912
0c22fafd312cd86 Greg Ungerer 2012-03-14 913 setup_sigcontext(&context, regs,
set->sig[0]);
0c22fafd312cd86 Greg Ungerer 2012-03-14 914 err |= copy_to_user
(&frame->sc, &context, sizeof(context));
0c22fafd312cd86 Greg Ungerer 2012-03-14 915
0c22fafd312cd86 Greg Ungerer 2012-03-14 916 /* Set up to return from userspace.
*/
0c22fafd312cd86 Greg Ungerer 2012-03-14 917 #ifdef CONFIG_MMU
0c22fafd312cd86 Greg Ungerer 2012-03-14 918 err |= __put_user(frame->retcode,
&frame->pretcode);
0c22fafd312cd86 Greg Ungerer 2012-03-14 919 /* moveq #,d0; trap #0 */
0c22fafd312cd86 Greg Ungerer 2012-03-14 920 err |= __put_user(0x70004e40 +
(__NR_sigreturn << 16),
0c22fafd312cd86 Greg Ungerer 2012-03-14 921 (long __user
*)(frame->retcode));
0c22fafd312cd86 Greg Ungerer 2012-03-14 922 #else
0c22fafd312cd86 Greg Ungerer 2012-03-14 @923 err |= __put_user((void *)
ret_from_user_signal, &frame->pretcode);
0c22fafd312cd86 Greg Ungerer 2012-03-14 924 #endif
0c22fafd312cd86 Greg Ungerer 2012-03-14 925
0c22fafd312cd86 Greg Ungerer 2012-03-14 926 if (err)
0d97500d3930126 Richard Weinberger 2013-10-07 927 return -EFAULT;
0c22fafd312cd86 Greg Ungerer 2012-03-14 928
0c22fafd312cd86 Greg Ungerer 2012-03-14 929 push_cache ((unsigned long)
&frame->retcode);
0c22fafd312cd86 Greg Ungerer 2012-03-14 930
0c22fafd312cd86 Greg Ungerer 2012-03-14 931 /*
0c22fafd312cd86 Greg Ungerer 2012-03-14 932 * Set up registers for signal
handler. All the state we are about
0c22fafd312cd86 Greg Ungerer 2012-03-14 933 * to destroy is successfully copied
to sigframe.
0c22fafd312cd86 Greg Ungerer 2012-03-14 934 */
0c22fafd312cd86 Greg Ungerer 2012-03-14 935 wrusp ((unsigned long) frame);
0d97500d3930126 Richard Weinberger 2013-10-07 936 regs->pc = (unsigned long)
ksig->ka.sa.sa_handler;
0c22fafd312cd86 Greg Ungerer 2012-03-14 937 adjustformat(regs);
0c22fafd312cd86 Greg Ungerer 2012-03-14 938
0c22fafd312cd86 Greg Ungerer 2012-03-14 939 /*
0c22fafd312cd86 Greg Ungerer 2012-03-14 940 * This is subtle; if we build more
than one sigframe, all but the
0c22fafd312cd86 Greg Ungerer 2012-03-14 941 * first one will see frame format 0
and have fsize == 0, so we won't
0c22fafd312cd86 Greg Ungerer 2012-03-14 942 * screw stkadj.
0c22fafd312cd86 Greg Ungerer 2012-03-14 943 */
0c22fafd312cd86 Greg Ungerer 2012-03-14 944 if (fsize)
0c22fafd312cd86 Greg Ungerer 2012-03-14 945 regs->stkadj = fsize;
0c22fafd312cd86 Greg Ungerer 2012-03-14 946
0c22fafd312cd86 Greg Ungerer 2012-03-14 947 /* Prepare to skip over the extra
stuff in the exception frame. */
0c22fafd312cd86 Greg Ungerer 2012-03-14 948 if (regs->stkadj) {
0c22fafd312cd86 Greg Ungerer 2012-03-14 949 struct pt_regs *tregs =
0c22fafd312cd86 Greg Ungerer 2012-03-14 950 (struct pt_regs *)((ulong)regs +
regs->stkadj);
7c79e1eef8c9a72 Geert Uytterhoeven 2016-12-06 951 pr_debug("Performing
stackadjust=%04lx\n", regs->stkadj);
0c22fafd312cd86 Greg Ungerer 2012-03-14 952 /* This must be copied with
decreasing addresses to
0c22fafd312cd86 Greg Ungerer 2012-03-14 953 handle overlaps.
*/
0c22fafd312cd86 Greg Ungerer 2012-03-14 954 tregs->vector = 0;
0c22fafd312cd86 Greg Ungerer 2012-03-14 955 tregs->format = 0;
0c22fafd312cd86 Greg Ungerer 2012-03-14 956 tregs->pc = regs->pc;
0c22fafd312cd86 Greg Ungerer 2012-03-14 957 tregs->sr = regs->sr;
0c22fafd312cd86 Greg Ungerer 2012-03-14 958 }
0c22fafd312cd86 Greg Ungerer 2012-03-14 959 return 0;
0c22fafd312cd86 Greg Ungerer 2012-03-14 960 }
0c22fafd312cd86 Greg Ungerer 2012-03-14 961
:::::: The code at line 923 was first introduced by commit
:::::: 0c22fafd312cd8658ca23f6067a20aec0781c02a m68k: merge the MMU and non-MMU signal.c
code
:::::: TO: Greg Ungerer <gerg(a)uclinux.org>
:::::: CC: Greg Ungerer <gerg(a)uclinux.org>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org