watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.3.307:2714]
Modules linked in:
CPU: 0 PID: 2714 Comm: syz.3.307 Tainted: G        W         5.10.225-syzkaller-00513-g8d23314f588a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:slab_alloc_node mm/slub.c:2873 [inline]
RIP: 0010:slab_alloc mm/slub.c:2955 [inline]
RIP: 0010:kmem_cache_alloc+0x252/0x2e0 mm/slub.c:2960
Code: ff ff ff e8 8c e3 58 ff e9 4e ff ff ff e8 26 56 05 03 4c 89 e7 48 89 de 44 89 f2 4c 89 d3 e8 95 ca 00 00 49 89 da 48 89 45 c8 <48> 85 c0 0f 84 74 fe ff ff 31 c0 e9 eb fe ff ff 49 83 7c 24 48 00
RSP: 0000:ffffc90000007b28 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881244f0000
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000007b70 R08: ffffffff81a864aa R09: 0000000000000003
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888107d9c000
R13: ffffffff83be4140 R14: 0000000000000a20 R15: 0000000000000a20
FS:  00007fd58a2226c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd58a201d58 CR3: 000000011a992000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 kmem_cache_alloc_node include/linux/slab.h:423 [inline]
 __alloc_skb+0x80/0x510 net/core/skbuff.c:200
 alloc_skb include/linux/skbuff.h:1126 [inline]
 ndisc_alloc_skb+0xf3/0x2d0 net/ipv6/ndisc.c:423
 ndisc_send_rs+0x26c/0x6a0 net/ipv6/ndisc.c:689
 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3964
 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1450
 expire_timers kernel/time/timer.c:1495 [inline]
 __run_timers+0x72a/0xa10 kernel/time/timer.c:1789
 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1802
 __do_softirq+0x268/0x5bb kernel/softirq.c:309
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:405 [inline]
 __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447
 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1094
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0033:0x7fd58b5a8ef9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd58a2220e8 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 00007fd58b760f88 RCX: 00007fd58b5a8ef9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fd58b760f8c
RBP: 00007fd58b760f80 R08: 00007ffe1efd90b0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd58b760f8c
R13: 0000000000000000 R14: 00007ffe1ef640f0 R15: 00007ffe1ef641d8
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 926 Comm: syz.0.100 Tainted: G        W         5.10.225-syzkaller-00513-g8d23314f588a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:sched_clock_cpu+0x0/0x3b0 kernel/sched/clock.c:366
Code: 05 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 c7 c7 00 76 6f 86 48 89 de e8 ff b1 24 01 e9 27 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 28 0f 1f 44 00 00
RSP: 0018:ffffc900001709e8 EFLAGS: 00000082
RAX: 0000000000000001 RBX: ffffffff85dc46b8 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff85602420 RDI: 0000000000000001
RBP: ffffc90000170a20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8881f71272c0
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f12d5443ff8 CR3: 0000000142c13000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 account_irq_enter_time include/linux/vtime.h:109 [inline]
 irq_enter_rcu+0x76/0xa0 kernel/softirq.c:377
 sysvec_apic_timer_interrupt+0x19/0xe0 arch/x86/kernel/apic/apic.c:1094
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:read_pnet include/net/net_namespace.h:335 [inline]
RIP: 0010:dev_net include/linux/netdevice.h:2396 [inline]
RIP: 0010:ipv6_get_ifaddr+0x191/0x640 net/ipv6/addrconf.c:2047
Code: d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 05 a3 82 fd 4c 8b 3b 49 8d 9f f8 04 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 <74> 08 48 89 df e8 e5 a2 82 fd 4c 39 2b 74 0a e8 db 08 45 fd e9 e0
RSP: 0018:ffffc90000170b20 EFLAGS: 00000246
RAX: 1ffff1102446e89f RBX: ffff8881223744f8 RCX: ffff88810ee44f00
RDX: 0000000000000101 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000170c18 R08: ffffffff8425a3a0 R09: ffffed1024d82521
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88811652a680 R14: ffff88812d404400 R15: ffff888122374000
 ndisc_send_rs+0x9a/0x6a0 net/ipv6/ndisc.c:674
 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3964
 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1450
 expire_timers kernel/time/timer.c:1495 [inline]
 __run_timers+0x72a/0xa10 kernel/time/timer.c:1789
 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1802
 __do_softirq+0x268/0x5bb kernel/softirq.c:309
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:405 [inline]
 __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447
 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1094
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:__local_bh_enable_ip+0x44/0x80 kernel/softirq.c:189
Code: 7e ff cf e8 2e 5b 09 00 65 8b 05 c3 b4 c2 7e a9 00 ff ff 00 75 19 48 c7 c7 a0 b4 07 85 e8 a4 40 6d 03 65 66 8b 05 5c 9e c5 7e <66> 85 c0 75 22 bf 01 00 00 00 e8 fd 5a 09 00 65 8b 05 92 b4 c2 7e
RSP: 0018:ffffc90000d476e8 EFLAGS: 00000282
RAX: 0000000000000082 RBX: ffff88811dda9280 RCX: 0000000000000201
RDX: 0000000000000000 RSI: ffffffff8507b4a0 RDI: ffffffff85602440
RBP: ffffc90000d476e8 R08: dffffc0000000000 R09: 0000000000000003
R10: fffff520001a8ed0 R11: dffffc0000000001 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88811dda8000
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline]
 _raw_spin_unlock_bh+0x51/0x60 kernel/locking/spinlock.c:207
 spin_unlock_bh include/linux/spinlock.h:399 [inline]
 tun_flow_flush drivers/net/tun.c:433 [inline]
 tun_flow_uninit+0x31c/0x330 drivers/net/tun.c:1386
 tun_free_netdev+0x7d/0x1b0 drivers/net/tun.c:2337
 netdev_run_todo+0xb7a/0xdc0 net/core/dev.c:10321
 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:112
 tun_detach drivers/net/tun.c:716 [inline]
 tun_chr_close+0xc4/0x140 drivers/net/tun.c:3486
 __fput+0x33d/0x7b0 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x129/0x190 kernel/task_work.c:189
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xc83/0x2a50 kernel/exit.c:863
 do_group_exit+0x141/0x310 kernel/exit.c:985
 get_signal+0x10a0/0x1410 kernel/signal.c:2790
 arch_do_signal_or_restart+0xbd/0x17c0 arch/x86/kernel/signal.c:805
 handle_signal_work kernel/entry/common.c:145 [inline]
 exit_to_user_mode_loop+0x9b/0xd0 kernel/entry/common.c:169
 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
 syscall_exit_to_user_mode+0xa2/0x1a0 kernel/entry/common.c:274
 do_syscall_64+0x40/0x70 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f31fcab6ef9
Code: Unable to access opcode bytes at RIP 0x7f31fcab6ecf.
RSP: 002b:00007f31fb730038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: fffffffffffffff2 RBX: 00007f31fcc6ef80 RCX: 00007f31fcab6ef9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f31fcb29b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f31fcc6ef80 R15: 00007ffe749addc8