watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.2:25897] Modules linked in: irq event stamp: 3481097 hardirqs last enabled at (3481096): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3481097): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1972): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (3071): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (3071): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 25897 Comm: syz-executor.2 Not tainted 4.19.204-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa3/0xe0 kernel/locking/spinlock.c:184 Code: 48 c7 c0 c8 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 2f 48 83 3d dc 65 d8 01 00 74 15 48 89 df 57 9d <0f> 1f 44 00 00 eb b2 e8 1b 20 e7 f8 eb c0 0f 0b 0f 0b 48 c7 c7 c8 RSP: 0018:ffff8880ba007cb0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3059 RBX: 0000000000000282 RCX: 1ffff11043cd899c RDX: dffffc0000000000 RSI: ffff88821e6c4cc0 RDI: 0000000000000282 RBP: ffff888017705870 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888017705870 R14: 0000000000000000 R15: 0000000000000000 FS: 00007ff992cb1700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000556e0da81f10 CR3: 000000023491e000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:384 [inline] skb_dequeue+0x125/0x180 net/core/skbuff.c:2839 mrp_queue_xmit net/802/mrp.c:366 [inline] mrp_join_timer+0x97/0xc0 net/802/mrp.c:611 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_release+0x429/0x8b0 kernel/locking/lockdep.c:3930 Code: 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 95 03 00 00 48 83 3d 5b 26 a6 08 00 0f 84 cc 01 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 49 c7 04 04 00 00 00 RSP: 0018:ffff88821b28f7d8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3059 RBX: ffff88821e6c43c0 RCX: 1ffff11043cd8998 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000282 RBP: 0000000000000003 R08: 0000000000400000 R09: 0000000000000003 R10: 0000000000000005 R11: 0000000000000000 R12: 1ffff11043651efe R13: 96a025a1adfbea8b R14: ffff88821e6c43c0 R15: 0000000000000004 up_write+0x18/0x150 kernel/locking/rwsem.c:132 ext4_truncate+0xe35/0x1380 fs/ext4/inode.c:4561 ext4_setattr+0x1c11/0x2560 fs/ext4/inode.c:5709 notify_change+0x70b/0xfc0 fs/attr.c:334 do_truncate+0x134/0x1f0 fs/open.c:63 handle_truncate fs/namei.c:3009 [inline] do_last fs/namei.c:3427 [inline] path_openat+0x2308/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe 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:00007ff992cb1188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffc2fb1950f R14: 00007ff992cb1300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 25908 Comm: syz-executor.2 Not tainted 4.19.204-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lookup_object lib/debugobjects.c:156 [inline] RIP: 0010:debug_object_deactivate lib/debugobjects.c:542 [inline] RIP: 0010:debug_object_deactivate+0x140/0x2e0 lib/debugobjects.c:529 Code: 8b ab c0 eb 36 8d 31 db 48 85 ed 74 44 49 bc 00 00 00 00 00 fc ff df 48 8d 7d 18 83 c3 01 48 89 f8 48 c1 e8 03 42 80 3c 20 00 <0f> 85 10 01 00 00 4c 3b 75 18 74 71 48 89 e8 48 c1 e8 03 42 80 3c RSP: 0018:ffff8880ba107d08 EFLAGS: 00000046 RAX: 1ffff1100304136f RBX: 0000000000000001 RCX: ffffffff814bed1b RDX: 1ffffffff1a7ba6b RSI: ffffffff89f90a80 RDI: ffff888018209b78 RBP: ffff888018209b60 R08: 0000000000000082 R09: fffffbfff1a7ba69 R10: ffffffff8d3dd34b R11: 0000000000000000 R12: dffffc0000000000 R13: 1ffff11017420fa3 R14: ffff8880a0cf9550 R15: ffffffff8d3dd348 FS: 00007ff992c4e700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000023491e000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_timer_deactivate kernel/time/timer.c:723 [inline] debug_deactivate kernel/time/timer.c:779 [inline] detach_timer kernel/time/timer.c:824 [inline] expire_timers+0xfd/0x4e0 kernel/time/timer.c:1365 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x50 kernel/kcov.c:106 Code: 65 8b 15 6c 4c 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 <48> 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 c3 0f 1f 84 00 00 RSP: 0018:ffff88821b92fd10 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000a659000 RDX: 000000000000190a RSI: ffffffff834368e9 RDI: ffff8880489ec600 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 00000000ffffff9f R13: 0000000000000003 R14: 1ffff11043725fa7 R15: ffff8880489ec600 apparmor_socket_post_create+0x69/0x11c0 security/apparmor/lsm.c:845 security_socket_post_create+0x64/0xc0 security/security.c:1381 __sock_create+0x5b5/0x740 net/socket.c:1379 sock_create net/socket.c:1414 [inline] __sys_socket+0xef/0x200 net/socket.c:1456 __do_sys_socket net/socket.c:1465 [inline] __se_sys_socket net/socket.c:1463 [inline] __x64_sys_socket+0x6f/0xb0 net/socket.c:1463 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe 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:00007ff992c4e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 000000000056c1a8 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000010 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c1a8 R13: 00007ffc2fb1950f R14: 00007ff992c4e300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 48 c7 c0 c8 82 f1 89 mov $0xffffffff89f182c8,%rax 7: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx e: fc ff df 11: 48 c1 e8 03 shr $0x3,%rax 15: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) 19: 75 2f jne 0x4a 1b: 48 83 3d dc 65 d8 01 cmpq $0x0,0x1d865dc(%rip) # 0x1d865ff 22: 00 23: 74 15 je 0x3a 25: 48 89 df mov %rbx,%rdi 28: 57 push %rdi 29: 9d popfq * 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2f: eb b2 jmp 0xffffffe3 31: e8 1b 20 e7 f8 callq 0xf8e72051 36: eb c0 jmp 0xfffffff8 38: 0f 0b ud2 3a: 0f 0b ud2 3c: 48 rex.W 3d: c7 .byte 0xc7 3e: c7 (bad) 3f: c8 .byte 0xc8