watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [syz.2.837:4439]
Modules linked in:
CPU: 1 PID: 4439 Comm: syz.2.837 Not tainted 5.15.167-syzkaller-00348-g2e66050fb753 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:slab_alloc_node mm/slub.c:3195 [inline]
RIP: 0010:slab_alloc mm/slub.c:3248 [inline]
RIP: 0010:__kmalloc+0x8a/0x270 mm/slub.c:4423
Code: 00 00 4c 89 e7 44 89 f1 e8 f3 e8 ff ff 48 85 c0 74 75 49 89 c5 0f 1f 44 00 00 49 8b 45 00 65 48 03 05 1a fd 4f 7e 48 8b 50 08 <48> 8b 38 48 85 ff 0f 84 c8 00 00 00 48 83 78 10 00 0f 84 bd 00 00
RSP: 0000:ffffc900009b74a8 EFLAGS: 00000286
RAX: ffff8881f713b3a0 RBX: 0000000000000188 RCX: 0000000000000000
RDX: 00000000000d3931 RSI: 0000000000000200 RDI: ffffffff86c56980
RBP: ffffc900009b74f8 R08: ffffffff83eb6de0 R09: fffffbfff0e32df7
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888100042f00
R13: ffff888100042f00 R14: 0000000000000b20 R15: 0000000000000188
FS:  00007fc43a1ce6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffde000000 CR3: 000000010eca9000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 kmalloc include/linux/slab.h:608 [inline]
 kzalloc include/linux/slab.h:733 [inline]
 neigh_alloc net/core/neighbour.c:438 [inline]
 ___neigh_create+0x6d0/0x1bd0 net/core/neighbour.c:591
 __neigh_create+0x32/0x40 net/core/neighbour.c:679
 ip6_finish_output2+0x9ee/0x16f0 net/ipv6/ip6_output.c:127
 __ip6_finish_output+0x60f/0x7c0 net/ipv6/ip6_output.c:201
 ip6_finish_output+0x31/0x210 net/ipv6/ip6_output.c:211
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip6_output+0x1f7/0x4c0 net/ipv6/ip6_output.c:234
 dst_output include/net/dst.h:444 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ndisc_send_skb+0x73e/0xc90 net/ipv6/ndisc.c:511
 ndisc_send_rs+0x532/0x6a0 net/ipv6/ndisc.c:705
 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3979
 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1457
 expire_timers kernel/time/timer.c:1502 [inline]
 __run_timers+0x72a/0xa10 kernel/time/timer.c:1773
 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1786
 handle_softirqs+0x25e/0x5c0 kernel/softirq.c:565
 __do_softirq kernel/softirq.c:603 [inline]
 invoke_softirq kernel/softirq.c:425 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:652
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:664
 sysvec_apic_timer_interrupt+0x49/0xc0 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0033:0x7fc43b555759
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:00007fc43a1ce038 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007fc43b70cf80 RCX: 00007fc43b555759
RDX: 00000000200006c0 RSI: 0000000000005452 RDI: 0000000000000005
RBP: 00007fc43b5c875e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc43b70cf80 R15: 00007ffd121654a8
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3873 Comm: syz.0.755 Not tainted 5.15.167-syzkaller-00348-g2e66050fb753 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:asm_sysvec_irq_work+0x0/0x20 arch/x86/include/asm/idtentry.h:660
Code: e8 35 da e0 ff e9 b0 03 00 00 0f 01 ca fc 6a ff e8 b5 02 00 00 48 89 c4 48 8d 6c 24 01 48 89 e7 e8 a5 d0 e0 ff e9 90 03 00 00 <0f> 01 ca fc 6a ff e8 95 02 00 00 48 89 c4 48 8d 6c 24 01 48 89 e7
RSP: 0018:ffffc90000007408 EFLAGS: 00000086
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff84559160
RDX: ffff8881107ebb40 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc90000007490 R08: ffffffff84559179 R09: fffff52000000ea3
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000007560
R13: ffffc90000007520 R14: ffff88810b4e4000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffde000000 CR3: 000000010d07a000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 ipv6_dev_get_saddr+0x38a/0x580 net/ipv6/addrconf.c:1848
 ip6_route_get_saddr include/net/ip6_route.h:145 [inline]
 ip6_dst_lookup_tail+0x46c/0x12f0 net/ipv6/ip6_output.c:1107
 ip6_dst_lookup+0x53/0x60 net/ipv6/ip6_output.c:1210
 icmpv6_route_lookup+0xe2/0x5a0 net/ipv6/icmp.c:366
 icmp6_send+0x10bd/0x1d60 net/ipv6/icmp.c:601
 __icmpv6_send include/linux/icmpv6.h:28 [inline]
 icmpv6_send include/linux/icmpv6.h:49 [inline]
 ip6_link_failure+0x36/0x190 net/ipv6/route.c:2794
 dst_link_failure include/net/dst.h:423 [inline]
 ndisc_error_report+0x9a/0xc0 net/ipv6/ndisc.c:715
 neigh_invalidate+0x243/0x470 net/core/neighbour.c:1001
 neigh_timer_handler+0x778/0xe70 net/core/neighbour.c:1088
 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1457
 expire_timers kernel/time/timer.c:1502 [inline]
 __run_timers+0x72a/0xa10 kernel/time/timer.c:1773
 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1786
 handle_softirqs+0x25e/0x5c0 kernel/softirq.c:565
 __do_softirq kernel/softirq.c:603 [inline]
 invoke_softirq kernel/softirq.c:425 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:652
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:664
 sysvec_apic_timer_interrupt+0x9a/0xc0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:finish_task_switch+0x16f/0x7b0 kernel/sched/core.c:5024
Code: 74 08 4c 89 ff e8 c1 73 65 00 49 8b 1f 48 85 db 4c 8b 6d c0 0f 85 ce 00 00 00 4c 89 e7 e8 09 e4 99 03 fb 49 8d 9d 38 0b 00 00 <48> 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df 42 0f b6 04 30
RSP: 0018:ffffc90000ad7300 EFLAGS: 00000282
RAX: 0000000080000001 RBX: ffff8881107ec678 RCX: 0000000000000002
RDX: 0000000040000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90000ad7350 R08: ffffffff8191f8f9 R09: fffffbfff0e53433
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f70378c0
R13: ffff8881107ebb40 R14: 1ffff1103ee07081 R15: ffff8881f7038408
 context_switch kernel/sched/core.c:5155 [inline]
 __schedule+0xcd4/0x1590 kernel/sched/core.c:6512
 preempt_schedule_irq+0xc7/0x140 kernel/sched/core.c:6916
 irqentry_exit_cond_resched+0x2a/0x30 kernel/entry/common.c:398
 irqentry_exit+0x30/0x40 kernel/entry/common.c:432
 sysvec_apic_timer_interrupt+0x55/0xc0 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__nr_to_section include/linux/mmzone.h:1591 [inline]
RIP: 0010:__pfn_to_section include/linux/mmzone.h:1676 [inline]
RIP: 0010:lookup_page_ext mm/page_ext.c:265 [inline]
RIP: 0010:page_ext_get+0x79/0x140 mm/page_ext.c:148
Code: 87 e5 00 00 00 48 c7 c0 60 ad 50 87 48 c1 e8 03 42 80 3c 20 00 74 0c 48 c7 c7 60 ad 50 87 e8 be 72 fa ff 48 8b 05 c7 6f 98 05 <48> 85 c0 74 42 4c 89 f9 48 c1 e9 16 48 8d 1c c8 48 89 d8 48 c1 e8
RSP: 0018:ffffc90000ad75f8 EFLAGS: 00000246
RAX: ffff88823fff6000 RBX: 00000000047f6100 RCX: ffff8881107ebb40
RDX: 0000000000000000 RSI: 00000000047f6100 RDI: 000000ffffffffc0
RBP: ffffc90000ad7618 R08: ffffffff81b83d6b R09: 0000000000000010
R10: ffffc90000ad7450 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffea00047f6100 R14: 000000ffffffffc0 R15: 000000000011fd84
 __reset_page_owner+0x41/0x190 mm/page_owner.c:157
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1472 [inline]
 free_pcp_prepare mm/page_alloc.c:1544 [inline]
 free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3534
 free_unref_page+0xe8/0x750 mm/page_alloc.c:3616
 free_the_page mm/page_alloc.c:805 [inline]
 __free_pages+0x61/0xf0 mm/page_alloc.c:5855
 __vunmap+0x7bc/0x8f0 mm/vmalloc.c:2652
 __vfree mm/vmalloc.c:2700 [inline]
 vfree+0x7f/0xb0 mm/vmalloc.c:2731
 kcov_put kernel/kcov.c:417 [inline]
 kcov_close+0x2b/0x50 kernel/kcov.c:519
 __fput+0x228/0x8c0 fs/file_table.c:280
 ____fput+0x15/0x20 fs/file_table.c:308
 task_work_run+0x129/0x190 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xc48/0x2ca0 kernel/exit.c:880
 do_group_exit+0x141/0x310 kernel/exit.c:1002
 get_signal+0x7a3/0x1630 kernel/signal.c:2904
 arch_do_signal_or_restart+0xbd/0x1680 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0xa0/0xe0 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x26/0x160 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f8a8a778759
Code: Unable to access opcode bytes at RIP 0x7f8a8a77872f.
RSP: 002b:00007f8a893f1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffff2 RBX: 00007f8a8a92ff80 RCX: 00007f8a8a778759
RDX: 0000000000000000 RSI: 0000000040082404 RDI: 0000000000000008
RBP: 00007f8a8a7eb75e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8a8a92ff80 R15: 00007ffc5accbbc8
 </TASK>