tree: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-5.15/io_uring head: 22ec865ddfba31ddf26b9d2b4a01e8437ca1f727 commit: 6a32aa46fa0b531970581d5b425514da7f9f8e46 [43/45] io_uring: remove files pointer in cancellation functions config: s390-randconfig-r031-20210812 (attached as .config) compiler: s390-linux-gcc (GCC) 10.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/com... git remote add block https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git git fetch --no-tags block for-5.15/io_uring git checkout 6a32aa46fa0b531970581d5b425514da7f9f8e46 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir ARCH=s390 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): kernel/exit.c: In function 'do_exit': 780 | io_uring_files_cancel(); | ^~~~~~~~~~~~~~~~~~~~~ In file included from kernel/exit.c:66: include/linux/io_uring.h:36:20: note: declared here 36 | static inline void io_uring_files_cancel(struct files_struct *files) | ^~~~~~~~~~~~~~~~~~~~~ kernel/exit.c: At top level: kernel/exit.c:1810:13: warning: no previous prototype for 'abort' [-Wmissing-prototypes] 1810 | __weak void abort(void) | ^~~~~ vim +/io_uring_files_cancel +780 kernel/exit.c 726 727 void __noreturn do_exit(long code) 728 { 729 struct task_struct *tsk = current; 730 int group_dead; 731 732 /* 733 * We can get here from a kernel oops, sometimes with preemption off. 734 * Start by checking for critical errors. 735 * Then fix up important state like USER_DS and preemption. 736 * Then do everything else. 737 */ 738 739 WARN_ON(blk_needs_flush_plug(tsk)); 740 741 if (unlikely(in_interrupt())) 742 panic("Aiee, killing interrupt handler!"); 743 if (unlikely(!tsk->pid)) 744 panic("Attempted to kill the idle task!"); 745 746 /* 747 * If do_exit is called because this processes oopsed, it's possible 748 * that get_fs() was left as KERNEL_DS, so reset it to USER_DS before 749 * continuing. Amongst other possible reasons, this is to prevent 750 * mm_release()->clear_child_tid() from writing to a user-controlled 751 * kernel address. 752 */ 753 force_uaccess_begin(); 754 755 if (unlikely(in_atomic())) { 756 pr_info("note: %s[%d] exited with preempt_count %d\n", 757 current->comm, task_pid_nr(current), 758 preempt_count()); 759 preempt_count_set(PREEMPT_ENABLED); 760 } 761 762 profile_task_exit(tsk); 763 kcov_task_exit(tsk); 764 765 ptrace_event(PTRACE_EVENT_EXIT, code); 766 767 validate_creds_for_do_exit(tsk); 768 769 /* 770 * We're taking recursive faults here in do_exit. Safest is to just 771 * leave this task alone and wait for reboot. 772 */ 773 if (unlikely(tsk->flags & PF_EXITING)) { 774 pr_alert("Fixing recursive fault but reboot is needed!\n"); 775 futex_exit_recursive(tsk); 776 set_current_state(TASK_UNINTERRUPTIBLE); 777 schedule(); 778 } 779 781 exit_signals(tsk); /* sets PF_EXITING */ 782 783 /* sync mm's RSS info before statistics gathering */ 784 if (tsk->mm) 785 sync_mm_rss(tsk->mm); 786 acct_update_integrals(tsk); 787 group_dead = atomic_dec_and_test(&tsk->signal->live); 788 if (group_dead) { 789 /* 790 * If the last thread of global init has exited, panic 791 * immediately to get a useable coredump. 792 */ 793 if (unlikely(is_global_init(tsk))) 794 panic("Attempted to kill init! exitcode=0x%08x\n", 795 tsk->signal->group_exit_code ?: (int)code); 796 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org