CC: [email protected] CC: [email protected] TO: Nicholas Piggin <[email protected]> CC: Michael Ellerman <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 66f4beaa6c1d28161f534471484b2daa2de1dce0 commit: 3a96570ffceb15c6ed9cc6f990f172dcdc8ac279 powerpc: convert interrupt handlers to use wrappers date: 9 months ago :::::: branch date: 23 hours ago :::::: commit date: 9 months ago config: powerpc-randconfig-m031-20211016 (attached as .config) compiler: powerpc-linux-gcc (GCC) 11.2.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> Reported-by: Dan Carpenter <[email protected]> New smatch warnings: arch/powerpc/kernel/traps.c:1631 ____alignment_exception() warn: bitwise AND condition is false here Old smatch warnings: arch/powerpc/kernel/traps.c:1254 emulate_string_inst() warn: bitwise AND condition is false here vim +1631 arch/powerpc/kernel/traps.c bf593907f7236e Paul Mackerras 2013-06-14 1618 3a96570ffceb15 Nicholas Piggin 2021-01-30 1619 DEFINE_INTERRUPT_HANDLER(alignment_exception) 14cf11af6cf608 Paul Mackerras 2005-09-26 1620 { ba12eedee321ee Li Zhong 2013-05-13 1621 enum ctx_state prev_state = exception_enter(); 4393c4f6788cee Benjamin Herrenschmidt 2006-11-01 1622 int sig, code, fixed = 0; 9409d2f9dad2f0 Jordan Niethe 2020-05-06 1623 unsigned long reason; 14cf11af6cf608 Paul Mackerras 2005-09-26 1624 a3512b2dd57cb6 Benjamin Herrenschmidt 2012-05-08 1625 /* We restore the interrupt state now */ a3512b2dd57cb6 Benjamin Herrenschmidt 2012-05-08 1626 if (!arch_irq_disabled_regs(regs)) a3512b2dd57cb6 Benjamin Herrenschmidt 2012-05-08 1627 local_irq_enable(); a3512b2dd57cb6 Benjamin Herrenschmidt 2012-05-08 1628 9409d2f9dad2f0 Jordan Niethe 2020-05-06 1629 reason = get_reason(regs); 9409d2f9dad2f0 Jordan Niethe 2020-05-06 1630 9409d2f9dad2f0 Jordan Niethe 2020-05-06 @1631 if (reason & REASON_BOUNDARY) { 9409d2f9dad2f0 Jordan Niethe 2020-05-06 1632 sig = SIGBUS; 9409d2f9dad2f0 Jordan Niethe 2020-05-06 1633 code = BUS_ADRALN; 9409d2f9dad2f0 Jordan Niethe 2020-05-06 1634 goto bad; 9409d2f9dad2f0 Jordan Niethe 2020-05-06 1635 } 9409d2f9dad2f0 Jordan Niethe 2020-05-06 1636 6ce6c629fd8254 Michael Neuling 2013-05-26 1637 if (tm_abort_check(regs, TM_CAUSE_ALIGNMENT | TM_CAUSE_PERSISTENT)) 6ce6c629fd8254 Michael Neuling 2013-05-26 1638 goto bail; 6ce6c629fd8254 Michael Neuling 2013-05-26 1639 e9370ae15dc2f8 Paul Mackerras 2006-06-07 1640 /* we don't implement logging of alignment exceptions */ e9370ae15dc2f8 Paul Mackerras 2006-06-07 1641 if (!(current->thread.align_ctl & PR_UNALIGN_SIGBUS)) 14cf11af6cf608 Paul Mackerras 2005-09-26 1642 fixed = fix_alignment(regs); 14cf11af6cf608 Paul Mackerras 2005-09-26 1643 14cf11af6cf608 Paul Mackerras 2005-09-26 1644 if (fixed == 1) { 9409d2f9dad2f0 Jordan Niethe 2020-05-06 1645 /* skip over emulated instruction */ 9409d2f9dad2f0 Jordan Niethe 2020-05-06 1646 regs->nip += inst_length(reason); 14cf11af6cf608 Paul Mackerras 2005-09-26 1647 emulate_single_step(regs); ba12eedee321ee Li Zhong 2013-05-13 1648 goto bail; 14cf11af6cf608 Paul Mackerras 2005-09-26 1649 } 14cf11af6cf608 Paul Mackerras 2005-09-26 1650 14cf11af6cf608 Paul Mackerras 2005-09-26 1651 /* Operand address was bad */ 14cf11af6cf608 Paul Mackerras 2005-09-26 1652 if (fixed == -EFAULT) { 4393c4f6788cee Benjamin Herrenschmidt 2006-11-01 1653 sig = SIGSEGV; 4393c4f6788cee Benjamin Herrenschmidt 2006-11-01 1654 code = SEGV_ACCERR; 4393c4f6788cee Benjamin Herrenschmidt 2006-11-01 1655 } else { 4393c4f6788cee Benjamin Herrenschmidt 2006-11-01 1656 sig = SIGBUS; 4393c4f6788cee Benjamin Herrenschmidt 2006-11-01 1657 code = BUS_ADRALN; 4393c4f6788cee Benjamin Herrenschmidt 2006-11-01 1658 } 9409d2f9dad2f0 Jordan Niethe 2020-05-06 1659 bad: 14cf11af6cf608 Paul Mackerras 2005-09-26 1660 if (user_mode(regs)) 4393c4f6788cee Benjamin Herrenschmidt 2006-11-01 1661 _exception(sig, regs, code, regs->dar); 14cf11af6cf608 Paul Mackerras 2005-09-26 1662 else 8458c628a53ba4 Nicholas Piggin 2021-01-30 1663 bad_page_fault(regs, sig); ba12eedee321ee Li Zhong 2013-05-13 1664 ba12eedee321ee Li Zhong 2013-05-13 1665 bail: ba12eedee321ee Li Zhong 2013-05-13 1666 exception_exit(prev_state); 14cf11af6cf608 Paul Mackerras 2005-09-26 1667 } 14cf11af6cf608 Paul Mackerras 2005-09-26 1668 :::::: The code at line 1631 was first introduced by commit :::::: 9409d2f9dad2f0679d67dc24d8116dd3e837b035 powerpc: Support prefixed instructions in alignment handler :::::: TO: Jordan Niethe <[email protected]> :::::: CC: Michael Ellerman <[email protected]> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
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