watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.3:19944] Modules linked in: irq event stamp: 3583993 hardirqs last enabled at (3583992): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3583993): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (0): [] copy_process.part.0+0x15b9/0x8260 kernel/fork.c:1856 softirqs last disabled at (331): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (331): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 19944 Comm: syz-executor.3 Not tainted 4.19.211-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: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 7b 34 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:ffff8880ba007c38 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: ffff88822207e180 RCX: 1ffff1104440fd50 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000286 RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000000000003 R10: 0000000000000005 R11: 0000000000000000 R12: 1ffff11017400f8a R13: b424e96cf8e55170 R14: ffff88822207e180 R15: 0000000000000004 FS: 00007fb131939700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c321000 CR3: 00000001f2fec000 CR4: 00000000003426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_unlock+0x17/0x40 kernel/locking/spinlock.c:176 spin_unlock include/linux/spinlock.h:369 [inline] garp_join_timer+0xa7/0xf0 net/802/garp.c:424 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:__ref_is_percpu include/linux/percpu-refcount.h:160 [inline] RIP: 0010:percpu_ref_tryget include/linux/percpu-refcount.h:219 [inline] RIP: 0010:css_tryget include/linux/cgroup.h:343 [inline] RIP: 0010:cgroup_tryget include/linux/cgroup.h:416 [inline] RIP: 0010:cgroup_sk_alloc+0x3d7/0x7e0 kernel/cgroup/cgroup.c:5943 Code: 85 ff 58 0f 85 5f 01 00 00 e8 b5 49 05 00 49 8d 7c 24 18 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 e2 03 00 00 4d 8b 7c 24 18 <31> ff 4c 89 f8 83 e0 03 48 89 c6 48 89 44 24 20 e8 14 4b 05 00 48 RSP: 0018:ffff8881e4887c70 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffff1100930064b RBX: 1ffff1103c910f94 RCX: ffffc90008035000 RDX: 00000000000016be RSI: ffffffff815d3bbb RDI: ffff888049803258 RBP: ffff888205ff2cb0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 00000000d0491487 R12: ffff888049803240 R13: dffffc0000000000 R14: ffff8880a8e98dc0 R15: 0000607f45c9edf8 sk_alloc+0x3be/0xec0 net/core/sock.c:1557 __netlink_create+0x63/0x270 net/netlink/af_netlink.c:648 netlink_create+0x3ad/0x5e0 net/netlink/af_netlink.c:711 __sock_create+0x3d8/0x740 net/socket.c:1365 sock_create net/socket.c:1416 [inline] __sys_socket+0xef/0x200 net/socket.c:1458 __do_sys_socket net/socket.c:1467 [inline] __se_sys_socket net/socket.c:1465 [inline] __x64_sys_socket+0x6f/0xb0 net/socket.c:1465 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb1343c3ae9 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:00007fb131939188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007fb1344d6f60 RCX: 00007fb1343c3ae9 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000010 RBP: 00007fb13441df25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe67618a6f R14: 00007fb131939300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 19977 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_release kernel/locking/lockdep.c:3665 [inline] RIP: 0010:lock_release+0x1ce/0x8b0 kernel/locking/lockdep.c:3927 Code: d0 7c 08 84 d2 0f 85 1b 06 00 00 44 8b 0d ba a5 fa 08 45 85 c9 0f 84 f3 01 00 00 49 8d 86 80 08 00 00 48 89 c2 48 89 44 24 08 <48> b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08 RSP: 0018:ffff8880ba107a38 EFLAGS: 00000002 RAX: ffff888204a88900 RBX: ffff8880af01dd28 RCX: 1ffffffff148be2c RDX: ffff888204a88900 RSI: 0000000000000002 RDI: ffff888204a88904 RBP: ffffffff89f95488 R08: ffffffff8cd33fc8 R09: 0000000000000001 R10: 0000000000000005 R11: ffffffff8c66505b R12: 1ffff11017420f4a R13: ffffffff815444c8 R14: ffff888204a88080 R15: dffffc0000000000 FS: 00007f5d21aa2700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd5b652c718 CR3: 0000000053445000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: seqcount_lockdep_reader_access include/linux/seqlock.h:82 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] ktime_get_update_offsets_now+0xe3/0x460 kernel/time/timekeeping.c:2225 hrtimer_update_base kernel/time/hrtimer.c:621 [inline] hrtimer_interrupt+0x138/0x9e0 kernel/time/hrtimer.c:1567 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x50 kernel/kcov.c:100 Code: e8 11 dd 35 00 e9 ab fe ff ff 4c 89 ef e8 04 dd 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 <65> 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 RSP: 0018:ffff8880ba107cf0 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000101 RBX: ffff8880380ee3d8 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff86893a7f RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed100701dc74 R10: ffff8880380ee3a3 R11: 0000000000000000 R12: ffff8880380ee300 R13: ffff8880380ee3a0 R14: 0000000000000000 R15: 0000000000000000 mrp_queue_xmit net/802/mrp.c:366 [inline] mrp_join_timer+0x8f/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:__sanitizer_cov_trace_pc+0x47/0x50 kernel/kcov.c:111 Code: 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 0f 1f 84 00 00 00 00 00 49 89 f1 49 89 fa 65 48 8b 34 25 c0 df RSP: 0018:ffff8881e842f6c0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff888204a88080 RBX: ffffea0007a755c0 RCX: ffffffff818b840c RDX: 0000000000000000 RSI: ffffffff818b8362 RDI: 0000000000000006 RBP: 1ffff1103d085edb R08: 0000000000000000 R09: 000000000023ffff R10: 0000000000000006 R11: 0000000000000000 R12: 80000001e9d57007 R13: ffff888044bbfc60 R14: 00007f5d22558000 R15: ffff8881e842f6f8 _vm_normal_page+0x132/0x510 mm/memory.c:906 zap_pte_range mm/memory.c:1323 [inline] zap_pmd_range mm/memory.c:1463 [inline] zap_pud_range mm/memory.c:1492 [inline] zap_p4d_range mm/memory.c:1513 [inline] unmap_page_range+0x1141/0x2c50 mm/memory.c:1534 unmap_single_vma+0x198/0x300 mm/memory.c:1579 unmap_vmas+0xa9/0x180 mm/memory.c:1609 exit_mmap+0x2b9/0x530 mm/mmap.c:3093 __mmput kernel/fork.c:1016 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1037 exit_mm kernel/exit.c:549 [inline] do_exit+0xaec/0x2be0 kernel/exit.c:857 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f5d2452cae9 Code: Bad RIP value. RSP: 002b:00007f5d21aa2188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: 0000000000000004 RBX: 00007f5d2463ff60 RCX: 00007f5d2452cae9 RDX: 0000000000000010 RSI: 0000000000000003 RDI: 0000000000000010 RBP: 00007f5d24586f25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe5869feff R14: 00007f5d21aa2300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 84 08 test %cl,(%rax) 2: 00 00 add %al,(%rax) 4: 00 00 add %al,(%rax) 6: 00 00 add %al,(%rax) 8: 48 c1 e8 03 shr $0x3,%rax c: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) 10: 0f 85 95 03 00 00 jne 0x3ab 16: 48 83 3d 7b 34 a6 08 cmpq $0x0,0x8a6347b(%rip) # 0x8a63499 1d: 00 1e: 0f 84 cc 01 00 00 je 0x1f0 24: 48 8b 3c 24 mov (%rsp),%rdi 28: 57 push %rdi 29: 9d popfq * 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 36: fc ff df 39: 49 rex.WB 3a: c7 .byte 0xc7 3b: 04 04 add $0x4,%al 3d: 00 00 add %al,(%rax)