rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10500 ticks this GP) idle=ec1/1/0x4000000000000000 softirq=223337/223337 fqs=5244 (t=10502 jiffies g=375413 q=6327) NMI backtrace for cpu 1 CPU: 1 PID: 12065 Comm: syz-executor.4 Not tainted 5.15.0-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:627 [inline] check_cpu_stall kernel/rcu/tree_stall.h:711 [inline] rcu_pending kernel/rcu/tree.c:3878 [inline] rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2597 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:1421 __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:__sanitizer_cov_trace_pc+0x50/0x60 kernel/kcov.c:206 Code: 35 8b 82 a4 15 00 00 85 c0 74 2b 8b 82 80 15 00 00 83 f8 02 75 20 48 8b 8a 88 15 00 00 8b 92 84 15 00 00 48 8b 01 48 83 c0 01 <48> 39 c2 76 07 48 89 34 c1 48 89 01 c3 0f 1f 00 41 55 41 54 49 89 RSP: 0018:ffffc9001492f928 EFLAGS: 00000216 RAX: 0000000000040000 RBX: 0000000000000008 RCX: ffffc9001162f000 RDX: 0000000000040000 RSI: ffffffff82942bdf RDI: 0000000000000003 RBP: ffff8880675f1ac2 R08: 0000000000000008 R09: 0000000000000001 R10: ffffffff82942bd5 R11: 0000000000000000 R12: ffffffff89bfd9c0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000008 ntfs_collate_names+0x28f/0x3d0 fs/ntfs/unistr.c:115 ntfs_lookup_inode_by_name+0x62d/0x34b0 fs/ntfs/dir.c:234 load_and_init_usnjrnl+0xda/0x1180 fs/ntfs/super.c:1450 load_system_files fs/ntfs/super.c:2146 [inline] ntfs_fill_super+0x7c20/0x8440 fs/ntfs/super.c:2891 mount_bdev+0x34d/0x410 fs/super.c:1370 legacy_get_tree+0x105/0x220 fs/fs_context.c:610 vfs_get_tree+0x89/0x2f0 fs/super.c:1500 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: 0033:0x7f6ae8c4901a 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:00007f6ae61bcfa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f6ae8c4901a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f6ae61bd000 RBP: 00007f6ae61bd040 R08: 00007f6ae61bd040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f6ae61bd000 R15: 0000000020086e00 ---------------- Code disassembly (best guess): 0: 35 8b 82 a4 15 xor $0x15a4828b,%eax 5: 00 00 add %al,(%rax) 7: 85 c0 test %eax,%eax 9: 74 2b je 0x36 b: 8b 82 80 15 00 00 mov 0x1580(%rdx),%eax 11: 83 f8 02 cmp $0x2,%eax 14: 75 20 jne 0x36 16: 48 8b 8a 88 15 00 00 mov 0x1588(%rdx),%rcx 1d: 8b 92 84 15 00 00 mov 0x1584(%rdx),%edx 23: 48 8b 01 mov (%rcx),%rax 26: 48 83 c0 01 add $0x1,%rax * 2a: 48 39 c2 cmp %rax,%rdx <-- trapping instruction 2d: 76 07 jbe 0x36 2f: 48 89 34 c1 mov %rsi,(%rcx,%rax,8) 33: 48 89 01 mov %rax,(%rcx) 36: c3 retq 37: 0f 1f 00 nopl (%rax) 3a: 41 55 push %r13 3c: 41 54 push %r12 3e: 49 rex.WB 3f: 89 .byte 0x89