rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=219/1/0x4000000000000000 softirq=174438/174439 fqs=5233 (t=10500 jiffies g=333417 q=623) NMI backtrace for cpu 0 CPU: 0 PID: 6856 Comm: syz-executor.3 Not tainted 5.15.0-rc5-next-20211015-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343 print_cpu_stall kernel/rcu/tree_stall.h:604 [inline] check_cpu_stall kernel/rcu/tree_stall.h:688 [inline] rcu_pending kernel/rcu/tree.c:3889 [inline] rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2608 update_process_times+0x16d/0x200 kernel/time/timer.c:1785 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1428 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:write_comp_data kernel/kcov.c:221 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x3/0x70 kernel/kcov.c:287 Code: 83 c2 01 48 c7 44 30 e0 02 00 00 00 48 89 7c 30 e8 48 89 4c 30 f0 4c 89 54 d8 20 48 89 10 5b c3 0f 1f 80 00 00 00 00 41 89 f8 03 00 00 00 4c 8b 14 24 89 f1 65 48 8b 34 25 40 70 02 00 e8 14 RSP: 0018:ffffc900038a7980 EFLAGS: 00000286 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffc900107f8000 RDX: 0000000000040000 RSI: 0000000000000001 RDI: 00000000ffffffff RBP: ffffc900038f9000 R08: 00000000ffffffff R09: 0000000000000000 R10: ffffffff8291e91e R11: 0000000000000000 R12: ffff88814b67ee68 R13: ffff88814b67eeb8 R14: ffff8880714f6800 R15: dffffc0000000000 ntfs_lookup_inode_by_name+0x63b/0x34b0 fs/ntfs/dir.c:243 load_and_init_usnjrnl+0xda/0x1180 fs/ntfs/super.c:1450 load_system_files fs/ntfs/super.c:2146 [inline] ntfs_fill_super+0x7ad4/0x84e0 fs/ntfs/super.c:2893 mount_bdev+0x34d/0x410 fs/super.c:1368 legacy_get_tree+0x105/0x220 fs/fs_context.c:610 vfs_get_tree+0x89/0x2f0 fs/super.c:1498 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x1320/0x1fa0 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount fs/namespace.c:3516 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3516 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f39e91b4f6a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f39e6728fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f39e91b4f6a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f39e6729000 RBP: 00007f39e6729040 R08: 00007f39e6729040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f39e6729000 R15: 0000000020086400 ---------------- Code disassembly (best guess): 0: 83 c2 01 add $0x1,%edx 3: 48 c7 44 30 e0 02 00 movq $0x2,-0x20(%rax,%rsi,1) a: 00 00 c: 48 89 7c 30 e8 mov %rdi,-0x18(%rax,%rsi,1) 11: 48 89 4c 30 f0 mov %rcx,-0x10(%rax,%rsi,1) 16: 4c 89 54 d8 20 mov %r10,0x20(%rax,%rbx,8) 1b: 48 89 10 mov %rdx,(%rax) 1e: 5b pop %rbx 1f: c3 retq 20: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 27: 41 89 f8 mov %edi,%r8d * 2a: bf 03 00 00 00 mov $0x3,%edi <-- trapping instruction 2f: 4c 8b 14 24 mov (%rsp),%r10 33: 89 f1 mov %esi,%ecx 35: 65 48 8b 34 25 40 70 mov %gs:0x27040,%rsi 3c: 02 00 3e: e8 .byte 0xe8 3f: 14 .byte 0x14