------------[ cut here ]------------ WARNING: CPU: 0 PID: 426 at kernel/rcu/tree_stall.h:894 rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:886 Modules linked in: CPU: 0 PID: 426 Comm: syz-executor.5 Not tainted 5.14.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:894 Code: 0f 88 fa 00 00 00 be 04 00 00 00 48 c7 c7 a0 25 24 90 e8 5e a4 5a 00 b8 01 00 00 00 87 05 63 77 c2 0e 85 c0 0f 85 c9 00 00 00 <0f> 0b 48 81 fd c0 50 98 8b 48 c7 c3 ac c4 6c 8d 74 58 48 b8 00 00 RSP: 0018:ffffc90000007e30 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 000000010002781e RCX: ffffffff8161ae32 RDX: fffffbfff20484b4 RSI: 0000000000000004 RDI: ffffffff902425a0 RBP: ffffffff8b9850c0 R08: 0000000000000001 R09: 0000000000000003 R10: fffffbfff20484b4 R11: 1ffff1101738a526 R12: 1ffffffff16c1e30 R13: 0000000000000246 R14: ffff8880b9c52852 R15: 0000000000000001 FS: 00007f566b131700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000004 CR3: 000000008ac31000 CR4: 00000000001506f0 DR0: feffffff00000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: rcu_check_gp_start_stall kernel/rcu/tree_stall.h:857 [inline] rcu_core+0x4df/0x1380 kernel/rcu/tree.c:2780 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:6326 Code: 55 53 65 48 8b 1c 25 00 f0 01 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 92 26 20 f8 e8 dd 70 4c f8 fb bf 01 00 00 00 d2 cd ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 a0 15 20 RSP: 0018:ffffc9000230faf8 EFLAGS: 00000206 RAX: 0000000000139495 RBX: ffff88807802b880 RCX: 1ffffffff1ad8cc1 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffed100f005710 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817bd258 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 irqentry_exit+0x31/0x80 kernel/entry/common.c:427 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:tomoyo_compare_number_union security/tomoyo/file.c:115 [inline] RIP: 0010:tomoyo_check_path_number_acl+0xfe/0x320 security/tomoyo/file.c:282 Code: 00 00 48 8d 7d 40 4d 8b 6c 24 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 cb 01 00 00 4c 8b 75 40 <4d> 85 f6 0f 85 12 01 00 00 e8 74 15 d7 fd 48 8d 7d 30 48 b8 00 00 RSP: 0018:ffffc9000230fbc0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc90014aa1000 RDX: 1ffff110068ad078 RSI: ffffffff839e93e6 RDI: ffff8880345683c0 RBP: ffff888034568380 R08: 0000000000000000 R09: 0000000000000004 R10: ffffffff839e93c9 R11: 000000000000001f R12: ffffc9000230fcb8 R13: 0000000000002402 R14: 0000000000000000 R15: 0000000000000002 tomoyo_check_acl+0x13c/0x450 security/tomoyo/domain.c:175 tomoyo_path_number_perm+0x32a/0x590 security/tomoyo/file.c:733 security_file_ioctl+0x50/0xb0 security/security.c:1540 __do_sys_ioctl fs/ioctl.c:1063 [inline] __se_sys_ioctl fs/ioctl.c:1055 [inline] __x64_sys_ioctl+0xb3/0x200 fs/ioctl.c:1055 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: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f566b131188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000e43 RSI: 0000000000002402 RDI: 0000000000000005 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffde1fe241f R14: 00007f566b131300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 0f 88 fa 00 00 00 js 0x100 6: be 04 00 00 00 mov $0x4,%esi b: 48 c7 c7 a0 25 24 90 mov $0xffffffff902425a0,%rdi 12: e8 5e a4 5a 00 callq 0x5aa475 17: b8 01 00 00 00 mov $0x1,%eax 1c: 87 05 63 77 c2 0e xchg %eax,0xec27763(%rip) # 0xec27785 22: 85 c0 test %eax,%eax 24: 0f 85 c9 00 00 00 jne 0xf3 2a: 0f 0b ud2 <-- trapping instruction 2c: 48 81 fd c0 50 98 8b cmp $0xffffffff8b9850c0,%rbp 33: 48 c7 c3 ac c4 6c 8d mov $0xffffffff8d6cc4ac,%rbx 3a: 74 58 je 0x94 3c: 48 rex.W 3d: b8 .byte 0xb8