syzbot

R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1cdda63fa0 R15: 00007ffd911acc48
watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.8.255:2785]
Modules linked in:
CPU: 1 PID: 2785 Comm: syz.8.255 Not tainted 5.10.231-syzkaller-00700-g4055d754db6f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:last_frame arch/x86/kernel/unwind_frame.c:82 [inline]
RIP: 0010:is_last_frame arch/x86/kernel/unwind_frame.c:87 [inline]
RIP: 0010:is_last_task_frame arch/x86/kernel/unwind_frame.c:156 [inline]
RIP: 0010:unwind_next_frame+0x131/0x700 arch/x86/kernel/unwind_frame.c:266
Code: 18 48 89 d8 48 c1 e8 03 80 3c 10 00 74 12 48 89 df e8 53 42 76 00 48 ba 00 00 00 00 00 fc ff df 48 8b 3b 4c 8d af 00 80 00 00 <48> 81 c7 48 7f 00 00 48 8b 5d d0 48 39 fb 0f 84 32 01 00 00 49 8d
RSP: 0018:ffffc9000016fdd8 EFLAGS: 00000246
RAX: 1ffff11021a9776b RBX: ffff88810d4bbb58 RCX: 000000000016fe01
RDX: dffffc0000000000 RSI: ffffffff8144854e RDI: ffffc90000b80000
RBP: ffffc9000016fe50 R08: ffffc9000016ff48 R09: 0000000000000021
R10: ffffc9000016ff50 R11: dffffc0000000001 R12: ffffc90000b86e98
R13: ffffc90000b88000 R14: ffffc9000016fe60 R15: 1ffff9200002dfcc
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efdf5bbcef1 CR3: 000000000660f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:121
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x121/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1595 [inline]
 slab_free_freelist_hook+0xc0/0x190 mm/slub.c:1621
 slab_free mm/slub.c:3203 [inline]
 kmem_cache_free+0xa9/0x1e0 mm/slub.c:3219
 kfree_skbmem+0x104/0x170
 __kfree_skb net/core/skbuff.c:695 [inline]
 consume_skb+0xb4/0x250 net/core/skbuff.c:851
 netlink_broadcast_filtered+0x114e/0x1270 net/netlink/af_netlink.c:1517
 netlink_broadcast net/netlink/af_netlink.c:1539 [inline]
 nlmsg_multicast include/net/netlink.h:1033 [inline]
 nlmsg_notify+0x101/0x1c0 net/netlink/af_netlink.c:2528
 rtnl_notify+0x9c/0xd0 net/core/rtnetlink.c:737
 __neigh_notify+0xcc/0x120 net/core/neighbour.c:3387
 neigh_cleanup_and_release+0x2c/0x1b0 net/core/neighbour.c:102
 neigh_del net/core/neighbour.c:198 [inline]
 neigh_remove_one+0x36b/0x3d0 net/core/neighbour.c:219
 neigh_forced_gc net/core/neighbour.c:252 [inline]
 neigh_alloc net/core/neighbour.c:430 [inline]
 ___neigh_create+0x484/0x1a10 net/core/neighbour.c:592
 __neigh_create+0x32/0x40 net/core/neighbour.c:680
 ip6_finish_output2+0x957/0x1850 net/ipv6/ip6_output.c:142
 __ip6_finish_output+0x5ec/0x780 net/ipv6/ip6_output.c:216
 ip6_finish_output+0x34/0x1e0 net/ipv6/ip6_output.c:226
 NF_HOOK_COND include/linux/netfilter.h:288 [inline]
 ip6_output+0x1f7/0x4c0 net/ipv6/ip6_output.c:249
 dst_output include/net/dst.h:437 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ndisc_send_skb+0x6e9/0xc00 net/ipv6/ndisc.c:511
 ndisc_send_rs+0x532/0x6a0 net/ipv6/ndisc.c:705
 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:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:queue_work_on+0x11e/0x160 kernel/workqueue.c:1550
Code: 8b 7c 24 0c 48 8b 74 24 10 4c 89 e2 e8 5b 00 00 00 48 b9 00 00 00 00 00 fc ff df 84 db 0f 94 c0 4c 89 7c 24 18 ff 74 24 18 9d <48> c7 44 24 20 0e 36 e0 45 4a c7 04 31 00 00 00 00 65 48 8b 0c 25
RSP: 0018:ffffc90000b86f40 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: 0000000000000046 RDI: 0000000000000001
RBP: ffffc90000b86ff8 R08: dffffc0000000000 R09: 0000000000000003
R10: fffff52000170d94 R11: dffffc0000000001 R12: ffff8881f7153ba0
R13: dffffc0000000001 R14: 1ffff92000170dec R15: 0000000000000246
 queue_work include/linux/workqueue.h:515 [inline]
 schedule_work include/linux/workqueue.h:576 [inline]
 __vfree_deferred mm/vmalloc.c:2323 [inline]
 vfree_atomic+0x99/0xc0 mm/vmalloc.c:2341
 free_thread_stack+0x310/0x470 kernel/fork.c:301
 release_task_stack kernel/fork.c:439 [inline]
 put_task_stack+0x9f/0x120 kernel/fork.c:450
 finish_task_switch+0x24a/0x5a0 kernel/sched/core.c:3916
 context_switch kernel/sched/core.c:4049 [inline]
 __schedule+0xbee/0x1330 kernel/sched/core.c:4804
 preempt_schedule_irq+0xc7/0x140 kernel/sched/core.c:5065
 irqentry_exit_cond_resched kernel/entry/common.c:365 [inline]
 irqentry_exit+0x4f/0x60 kernel/entry/common.c:395
 sysvec_apic_timer_interrupt+0xcb/0xe0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:update_stack_state+0x0/0x460 arch/x86/kernel/unwind_frame.c:188
Code: 4c 89 e7 e8 62 3c 76 00 e9 6a fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 48 89 e5 48 8b 07 5d c3 0f 1f 80 00 00 00 00 <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 81 ec 90 00 00 00 48 89
RSP: 0018:ffffc90000b87370 EFLAGS: 00000246
RAX: ffffc90000b87b78 RBX: ffffc90000b879f0 RCX: 0000000000b87401
RDX: dffffc0000000000 RSI: ffffc90000b87b78 RDI: ffffc90000b87400
RBP: ffffc90000b873f0 R08: ffffc90000b874e8 R09: 0000000000000009
R10: ffffc90000b874f0 R11: dffffc0000000001 R12: 0000000000000000
R13: ffffc90000b87450 R14: ffffc90000b87400 R15: 1ffff92000170e80
 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:121
 save_stack+0x97/0x240 mm/page_owner.c:146
 __reset_page_owner+0x36/0x150 mm/page_owner.c:174
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 free_pcp_prepare mm/page_alloc.c:1421 [inline]
 free_unref_page_prepare+0x2ae/0x2d0 mm/page_alloc.c:3336
 free_unref_page mm/page_alloc.c:3391 [inline]
 free_the_page+0x9e/0x370 mm/page_alloc.c:5407
 __free_pages+0x67/0xc0 mm/page_alloc.c:5418
 __vunmap+0x7bc/0x8f0 mm/vmalloc.c:2301
 __vfree mm/vmalloc.c:2349 [inline]
 vfree+0x5c/0x80 mm/vmalloc.c:2380
 kcov_put kernel/kcov.c:408 [inline]
 kcov_close+0x2b/0x50 kernel/kcov.c:510
 __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:2793
 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]
 irqentry_exit_to_user_mode+0x4e/0x80 kernel/entry/common.c:287
 irqentry_exit+0x12/0x60 kernel/entry/common.c:375
 sysvec_apic_timer_interrupt+0xcb/0xe0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0033:0x7f1cdd7fd710
Code: Unable to access opcode bytes at RIP 0x7f1cdd7fd6e6.
RSP: 002b:00007f1cdbee5058 EFLAGS: 00000203
RAX: 00007f1cdbee5668 RBX: 00007f1cdda63fa0 RCX: 00007f1cdd8efaa8
RDX: 0000000000000000 RSI: 0000000000005452 RDI: 0000000000000005
RBP: 00007f1cdd8efaa8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1cdda63fa0 R15: 00007ffd911acc48
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3549 Comm: syz.6.324 Not tainted 5.10.231-syzkaller-00700-g4055d754db6f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:perf_callchain_kernel+0x489/0x640 arch/x86/events/core.c:2567
Code: 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 8c 7b a7 00 4c 89 33 48 8b 44 24 30 42 0f b6 04 20 84 c0 0f 85 9e 00 00 00 <48> 8b 44 24 10 ff 00 4c 89 ff e8 58 37 31 00 48 8b 44 24 18 42 0f
RSP: 0018:ffffc90000006a00 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88813dec8978 RCX: 000000000000001f
RDX: ffff8881077a2780 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000006b50 R08: ffffffff8100dead R09: ffffc90000006a80
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000000d4c R14: ffffffff81422b70 R15: ffffc90000006a80
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f49998536e8 CR3: 000000000660f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 get_perf_callchain+0x579/0x810 kernel/events/callchain.c:200
 perf_callchain kernel/events/core.c:7203 [inline]
 perf_prepare_sample+0x35a/0x1af0 kernel/events/core.c:7230
 __perf_event_output kernel/events/core.c:7388 [inline]
 perf_event_output_forward+0xdb/0x1b0 kernel/events/core.c:7408
 __perf_event_overflow+0x1c8/0x350 kernel/events/core.c:9064
 perf_swevent_hrtimer+0x3fd/0x560 kernel/events/core.c:10467
 __run_hrtimer kernel/time/hrtimer.c:1585 [inline]
 __hrtimer_run_queues+0x3d7/0xa50 kernel/time/hrtimer.c:1649
 hrtimer_interrupt+0x39a/0x8b0 kernel/time/hrtimer.c:1711
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0xfb/0x3f0 arch/x86/kernel/apic/apic.c:1112
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline]
 sysvec_apic_timer_interrupt+0xba/0xe0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:queued_write_lock_slowpath+0x19e/0x390 kernel/locking/qrwlock.c:79
Code: 4c 89 ff e8 04 4a 57 00 eb 20 f3 90 42 0f b6 04 33 84 c0 74 15 44 89 f9 80 e1 07 80 c1 03 38 c1 7c 08 4c 89 ff e8 e2 49 57 00 <41> 8b 07 3d 00 01 00 00 75 d6 43 0f b6 04 34 84 c0 75 53 c7 44 24
RSP: 0018:ffffc90000007480 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffffffff0da87ed RCX: ffffffff81510fab
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff86d43f68
RBP: ffffc90000007530 R08: dffffc0000000000 R09: fffffbfff0da87ee
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000000e9a
R13: 00000000000000ff R14: dffffc0000000000 R15: ffffffff86d43f68
 queued_write_lock include/asm-generic/qrwlock.h:95 [inline]
 __raw_write_lock_bh include/linux/rwlock_api_smp.h:204 [inline]
 _raw_write_lock_bh+0x10a/0x170 kernel/locking/spinlock.c:319
 ___neigh_create+0xccc/0x1a10 net/core/neighbour.c:626
 __neigh_create+0x32/0x40 net/core/neighbour.c:680
 ip6_finish_output2+0x957/0x1850 net/ipv6/ip6_output.c:142
 __ip6_finish_output+0x5ec/0x780 net/ipv6/ip6_output.c:216
 ip6_finish_output+0x34/0x1e0 net/ipv6/ip6_output.c:226
 NF_HOOK_COND include/linux/netfilter.h:288 [inline]
 ip6_output+0x1f7/0x4c0 net/ipv6/ip6_output.c:249
 dst_output include/net/dst.h:437 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ndisc_send_skb+0x6e9/0xc00 net/ipv6/ndisc.c:511
 ndisc_send_rs+0x532/0x6a0 net/ipv6/ndisc.c:705
 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:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:compound_head include/linux/page-flags.h:188 [inline]
RIP: 0010:PageSwapCache include/linux/page-flags.h:403 [inline]
RIP: 0010:free_swap_cache+0x30/0x230 mm/swap_state.c:327
Code: 41 56 41 55 41 54 53 50 48 89 fb 49 be 00 00 00 00 00 fc ff df e8 b0 f7 c4 ff 4c 8d 6b 08 4d 89 ef 49 c1 ef 03 43 80 3c 37 00 <74> 08 4c 89 ef e8 16 93 02 00 4d 8b 65 00 44 89 e6 83 e6 01 31 ff
RSP: 0018:ffffc90001ac7778 EFLAGS: 00000246
RAX: ffffffff81a5c6d0 RBX: ffffea000470e380 RCX: ffff8881077a2780
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea000470e380
RBP: ffffc90001ac77a8 R08: ffffffff81a5c787 R09: fffff940009241a9
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888131e2b010
R13: ffffea000470e388 R14: dffffc0000000000 R15: 1ffffd40008e1c71
 free_pages_and_swap_cache+0x63/0xa0 mm/swap_state.c:355
 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:240 [inline]
 tlb_flush_mmu mm/mmu_gather.c:247 [inline]
 tlb_finish_mmu+0x177/0x320 mm/mmu_gather.c:326
 exit_mmap+0x306/0x560 mm/mmap.c:3375
 __mmput+0x95/0x2d0 kernel/fork.c:1153
 mmput+0x59/0x170 kernel/fork.c:1176
 exit_mm kernel/exit.c:539 [inline]
 do_exit+0xbda/0x2a50 kernel/exit.c:850
 do_group_exit+0x141/0x310 kernel/exit.c:985
 get_signal+0x10a0/0x1410 kernel/signal.c:2793
 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: 0033:0x7fa5a4f2ad29
Code: Unable to access opcode bytes at RIP 0x7fa5a4f2acff.
RSP: 002b:00007fa5a359c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: 0000000000000004 RBX: 00007fa5a511afa0 RCX: 00007fa5a4f2ad29
RDX: 0000000000000000 RSI: 0000000020000080 RDI: ffffffffffffff9c
RBP: 00007fa5a4fa6aa8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa5a511afa0 R15: 00007ffdfa8c3a48