watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz-executor.3:9289] Modules linked in: irq event stamp: 0 hardirqs last enabled at (0): [<0000000000000000>] 0x0 hardirqs last disabled at (0): [] copy_process+0x21e7/0x7400 kernel/fork.c:2442 softirqs last enabled at (0): [] copy_process+0x2228/0x7400 kernel/fork.c:2446 softirqs last disabled at (0): [<0000000000000000>] 0x0 CPU: 0 PID: 9289 Comm: syz-executor.3 Not tainted 6.6.0-rc1-syzkaller-00198-g81335f90e8a8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:__sanitizer_cov_trace_switch+0x3b/0x90 kernel/kcov.c:341 Code: 53 48 8b 46 08 48 83 f8 20 74 63 77 44 48 83 f8 08 74 53 48 83 f8 10 75 2f 41 bd 03 00 00 00 4c 8b 75 00 31 db 4d 85 f6 74 1e <48> 8b 74 dd 10 4c 89 e2 4c 89 ef 48 83 c3 01 48 8b 4c 24 28 e8 1c RSP: 0018:ffffc90000007188 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff813a4eed RDX: ffff88801d5f0000 RSI: 0000000000000100 RDI: 0000000000000001 RBP: ffffffff8a89cee0 R08: 0000000000000001 R09: 0000000000000002 R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000001 R14: 0000000000000003 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555dfde13048 CR3: 000000002b114000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: unwind_next_frame+0x77d/0x2390 arch/x86/kernel/unwind_orc.c:581 arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492 __call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:2653 call_rcu_hurry include/linux/rcupdate.h:117 [inline] dst_release net/core/dst.c:167 [inline] dst_release+0x1b5/0x1e0 net/core/dst.c:164 refdst_drop include/net/dst.h:270 [inline] skb_dst_drop include/net/dst.h:282 [inline] skb_release_head_state+0x254/0x2b0 net/core/skbuff.c:1036 skb_release_all net/core/skbuff.c:1051 [inline] __kfree_skb net/core/skbuff.c:1067 [inline] kfree_skb_reason+0xc1/0x210 net/core/skbuff.c:1103 kfree_skb include/linux/skbuff.h:1234 [inline] neigh_connected_output+0x51f/0x5d0 net/core/neighbour.c:1584 neigh_output include/net/neighbour.h:542 [inline] ip6_finish_output2+0x610/0x1b20 net/ipv6/ip6_output.c:135 __ip6_finish_output net/ipv6/ip6_output.c:196 [inline] ip6_finish_output+0x485/0x1250 net/ipv6/ip6_output.c:207 NF_HOOK_COND include/linux/netfilter.h:293 [inline] ip6_output+0x23a/0x880 net/ipv6/ip6_output.c:228 dst_output include/net/dst.h:458 [inline] NF_HOOK.constprop.0+0xfd/0x540 include/linux/netfilter.h:304 ndisc_send_skb+0x9f1/0x1430 net/ipv6/ndisc.c:509 ndisc_send_rs+0x133/0x690 net/ipv6/ndisc.c:719 addrconf_rs_timer+0x412/0x840 net/ipv6/addrconf.c:3973 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x764/0xb10 kernel/time/timer.c:2022 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035 __do_softirq+0x218/0x965 kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1074 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:get_current arch/x86/include/asm/current.h:41 [inline] RIP: 0010:__rcu_read_unlock+0xd1/0x570 kernel/rcu/tree_plugin.h:429 Code: 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 c3 01 00 00 8b 85 40 04 00 00 85 c0 75 54 <65> 48 8b 1c 25 c0 bc 03 00 48 8d bb 3c 04 00 00 48 b8 00 00 00 00 RSP: 0018:ffffc90014f87630 EFLAGS: 00000246 RAX: 0000000000000046 RBX: ffff8880b983d600 RCX: 1ffffffff1d9cb7b RDX: 0000000000000000 RSI: ffffffff8ae92920 RDI: ffffffff81719be0 RBP: ffff88801d5f0000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8ece2657 R11: 0000000000000000 R12: ffffffff8cbb6340 R13: 0000000000000200 R14: dffffc0000000000 R15: 0000008dc657be97 rcu_read_unlock include/linux/rcupdate.h:781 [inline] page_ext_put+0x35/0xd0 mm/page_ext.c:533 __reset_page_owner+0x137/0x190 mm/page_owner.c:157 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312 free_unref_page_list+0xe6/0xb30 mm/page_alloc.c:2451 release_pages+0x32a/0x14e0 mm/swap.c:1042 folios_put include/linux/mm.h:1531 [inline] folio_batch_move_lru+0x2f7/0x470 mm/swap.c:224 lru_add_drain_cpu+0x553/0x850 mm/swap.c:652 lru_add_drain+0x10c/0x440 mm/swap.c:752 exit_mmap+0x180/0xa60 mm/mmap.c:3205 __mmput+0x12a/0x4d0 kernel/fork.c:1349 mmput+0x62/0x70 kernel/fork.c:1371 exit_mm kernel/exit.c:567 [inline] do_exit+0x9b4/0x2a20 kernel/exit.c:861 do_group_exit+0xd4/0x2a0 kernel/exit.c:1024 get_signal+0x23d1/0x27b0 kernel/signal.c:2892 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb410c7cae9 Code: Unable to access opcode bytes at 0x7fb410c7cabf. RSP: 002b:00007fb40f7fe178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007fb410d9bf88 RCX: 00007fb410c7cae9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fb410d9bf88 RBP: 00007fb410d9bf80 R08: 00007fb40f7fe6c0 R09: 00007fb40f7fe6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb410d9bf8c R13: 000000000000000b R14: 00007ffcd9db0790 R15: 00007ffcd9db0878 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9259 Comm: syz-executor.1 Not tainted 6.6.0-rc1-syzkaller-00198-g81335f90e8a8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:__sanitizer_cov_trace_pc+0x60/0x70 kernel/kcov.c:225 Code: 82 e0 15 00 00 83 f8 02 75 20 48 8b 8a e8 15 00 00 8b 92 e4 15 00 00 48 8b 01 48 83 c0 01 48 39 d0 73 07 48 89 01 48 89 34 c1 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 f3 0f 1e fa 41 57 RSP: 0018:ffffc900001f0568 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffffe8ffffdc4000 RCX: 0000000000000100 RDX: ffff88802013bb80 RSI: ffffffff819032fc RDI: ffffe8ffffdc4014 RBP: 0000000000000014 R08: 0000000000000004 R09: 0000000000000004 R10: ffffe8ffffdc400c R11: 0000000000000000 R12: 0000000000000001 R13: ffffc900001f0600 R14: 0000000000000001 R15: ffffe8ffffd1c888 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc8aff76468 CR3: 000000001c5a7000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: perf_trace_buf_alloc+0x18c/0x260 kernel/trace/trace_event_perf.c:414 perf_trace_preemptirq_template+0x12c/0x460 include/trace/events/preemptirq.h:14 trace_irq_enable.constprop.0+0xb4/0x100 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x26/0x40 kernel/trace/trace_preemptirq.c:56 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:670 RIP: 0010:ip6t_do_table+0xada/0x1d20 net/ipv6/netfilter/ip6_tables.c:321 Code: 8d 7b 08 48 8b 14 24 48 b9 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 80 3c 08 00 0f 85 ab 11 00 00 48 8d 7d 70 4c 8b 63 08 <48> b9 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 0f b6 04 08 84 RSP: 0018:ffffc900001f0748 EFLAGS: 00000246 RAX: 1ffffd1ffffb0e05 RBX: ffffe8ffffd87020 RCX: dffffc0000000000 RDX: ffff888077ad8a6c RSI: ffffffff890c99cf RDI: ffff88802544a6b0 RBP: ffff88802544a640 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000002 R11: 0200000000000000 R12: 0000000000000df4 R13: ffff888077ad8a88 R14: ffff888077ad89e0 R15: 0000000000000000 nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline] nf_hook_slow+0xbf/0x1e0 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:259 [inline] NF_HOOK.constprop.0+0x1f1/0x540 include/linux/netfilter.h:302 ndisc_send_skb+0x9f1/0x1430 net/ipv6/ndisc.c:509 ndisc_send_rs+0x133/0x690 net/ipv6/ndisc.c:719 addrconf_rs_timer+0x412/0x840 net/ipv6/addrconf.c:3973 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x764/0xb10 kernel/time/timer.c:2022 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035 __do_softirq+0x218/0x965 kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1074 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:page_remove_rmap+0x773/0xd30 mm/rmap.c:1466 Code: b7 b8 ff 31 f6 31 ff e8 7b b2 b8 ff e8 06 b7 b8 ff 49 8d 7d 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 a9 04 00 00 49 8b 5d 20 31 ff 81 e3 00 20 00 00 48 89 de e8 RSP: 0018:ffffc90014e4f6e8 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffea000108a218 RCX: 0000000000000000 RDX: 1ffff11003e59624 RSI: ffffffff81cf177a RDI: ffff88801f2cb120 RBP: ffffea000108a200 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 1ffff11004a5c442 R12: 0000000000000000 R13: ffff88801f2cb100 R14: 0000000000000000 R15: 0000000000000000 zap_pte_range mm/memory.c:1456 [inline] zap_pmd_range mm/memory.c:1573 [inline] zap_pud_range mm/memory.c:1602 [inline] zap_p4d_range mm/memory.c:1623 [inline] unmap_page_range+0x179c/0x2c10 mm/memory.c:1644 unmap_single_vma+0x194/0x2b0 mm/memory.c:1690 unmap_vmas+0x1e8/0x330 mm/memory.c:1731 exit_mmap+0x1ad/0xa60 mm/mmap.c:3210 __mmput+0x12a/0x4d0 kernel/fork.c:1349 mmput+0x62/0x70 kernel/fork.c:1371 exit_mm kernel/exit.c:567 [inline] do_exit+0x9b4/0x2a20 kernel/exit.c:861 do_group_exit+0xd4/0x2a0 kernel/exit.c:1024 get_signal+0x23d1/0x27b0 kernel/signal.c:2892 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f92adc7cae9 Code: Unable to access opcode bytes at 0x7f92adc7cabf. RSP: 002b:00007f92aea6b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00007f92add9bf80 RCX: 00007f92adc7cae9 RDX: 00000000200004c0 RSI: 0000000000005452 RDI: 0000000000000006 RBP: 00007f92adcc847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f92add9bf80 R15: 00007ffec7df05f8