rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (1 GPs behind) idle=f15/1/0x4000000000000000 softirq=227891/227892 fqs=5212 (t=10500 jiffies g=439069 q=973) NMI backtrace for cpu 1 CPU: 1 PID: 24905 Comm: syz-executor.2 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+0x1dc/0x2d8 lib/dump_stack.c:106 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x22d/0x390 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+0x1e33/0x2bc0 kernel/rcu/tree.c:2597 update_process_times+0x197/0x200 kernel/time/timer.c:1785 tick_sched_handle kernel/time/tick-sched.c:226 [inline] tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1421 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 RIP: 0010:ntfs_lookup_inode_by_name+0x3c8/0x37b0 fs/ntfs/dir.c:134 Code: 4c 24 50 0f b6 04 29 84 c0 0f 85 f0 05 00 00 48 89 d8 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 01 06 00 00 48 8b 44 24 70 0f b7 18 <83> e3 02 31 ff 89 de e8 ec 49 d6 fe 66 85 db 0f 85 04 09 00 00 49 RSP: 0018:ffffc90009f7f810 EFLAGS: 00000246 RAX: ffff888025ddee74 RBX: 0000000000000000 RCX: 1ffff11004bbbdce RDX: ffffc9001b979000 RSI: 000000000003ffff RDI: ffff888025ddee72 RBP: dffffc0000000000 R08: 0000000000000005 R09: ffffffff82ae0a2e R10: 0000000000000002 R11: ffff88807ced0000 R12: 1ffff11004bbbdd7 R13: ffff888025ddee68 R14: ffff888025ddeeba R15: ffff888025ddeeb9 load_and_init_usnjrnl+0x109/0x1020 fs/ntfs/super.c:1450 load_system_files fs/ntfs/super.c:2146 [inline] ntfs_fill_super+0x4c91/0x5f00 fs/ntfs/super.c:2891 mount_bdev+0x26c/0x3a0 fs/super.c:1370 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x86/0x270 fs/super.c:1500 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x1986/0x2c30 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount+0x308/0x3c0 fs/namespace.c:3516 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f37ee0af01a 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:00007f37eb622fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f37ee0af01a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f37eb623000 RBP: 00007f37eb623040 R08: 00007f37eb623040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f37eb623000 R15: 0000000020086400 ---------------- Code disassembly (best guess): 0: 4c 24 50 rex.WR and $0x50,%al 3: 0f b6 04 29 movzbl (%rcx,%rbp,1),%eax 7: 84 c0 test %al,%al 9: 0f 85 f0 05 00 00 jne 0x5ff f: 48 89 d8 mov %rbx,%rax 12: 48 c1 e8 03 shr $0x3,%rax 16: 0f b6 04 28 movzbl (%rax,%rbp,1),%eax 1a: 84 c0 test %al,%al 1c: 0f 85 01 06 00 00 jne 0x623 22: 48 8b 44 24 70 mov 0x70(%rsp),%rax 27: 0f b7 18 movzwl (%rax),%ebx * 2a: 83 e3 02 and $0x2,%ebx <-- trapping instruction 2d: 31 ff xor %edi,%edi 2f: 89 de mov %ebx,%esi 31: e8 ec 49 d6 fe callq 0xfed64a22 36: 66 85 db test %bx,%bx 39: 0f 85 04 09 00 00 jne 0x943 3f: 49 rex.WB