watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.4.148:989] Modules linked in: CPU: 0 PID: 989 Comm: syz.4.148 Not tainted 5.4.276-syzkaller-00021-g58de09405d1e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:27 [inline] RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:49 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:175 [inline] RIP: 0010:unwind_next_frame+0x60b/0x1ea0 arch/x86/kernel/unwind_orc.c:438 Code: c1 48 c1 f9 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe 49 8d 5c 45 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 75 27 48 63 03 48 01 d8 48 8d 4b 04 4c 39 e0 4c 0f 46 e9 48 RSP: 0018:ffff8881f6e08fe0 EFLAGS: 00000a03 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffffffff8675fd5c RCX: dffffc0000000000 RDX: ffffffff8675fd50 RSI: ffffffff86b3484a RDI: 0000000000000001 RBP: ffff8881f6e092d0 R08: 0000000000000007 R09: ffff8881f6e09330 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff84602529 R13: ffffffff8675fd50 R14: ffffffff8675fd50 R15: ffffffff8675fd68 FS: 00007f487865e6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f48793dcb6f CR3: 00000001ecd3d000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: arch_stack_walk+0x111/0x140 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1c0 kernel/stacktrace.c:123 save_stack mm/kasan/common.c:70 [inline] set_track mm/kasan/common.c:78 [inline] kasan_set_free_info mm/kasan/common.c:345 [inline] __kasan_slab_free+0x1b5/0x270 mm/kasan/common.c:487 slab_free_hook mm/slub.c:1455 [inline] slab_free_freelist_hook mm/slub.c:1494 [inline] slab_free mm/slub.c:3080 [inline] kfree+0x123/0x370 mm/slub.c:4071 skb_release_all net/core/skbuff.c:675 [inline] __kfree_skb net/core/skbuff.c:689 [inline] kfree_skb+0xb8/0x3c0 net/core/skbuff.c:708 neigh_connected_output+0x407/0x430 net/core/neighbour.c:1539 neigh_output include/net/neighbour.h:518 [inline] ip6_finish_output2+0xf9e/0x18e0 net/ipv6/ip6_output.c:144 NF_HOOK_COND include/linux/netfilter.h:292 [inline] ip6_output+0x1b3/0x430 net/ipv6/ip6_output.c:248 dst_output include/net/dst.h:438 [inline] NF_HOOK include/linux/netfilter.h:303 [inline] ndisc_send_skb+0x702/0xc30 net/ipv6/ndisc.c:509 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3954 call_timer_fn+0x36/0x390 kernel/time/timer.c:1448 expire_timers kernel/time/timer.c:1493 [inline] __run_timers+0x879/0xbe0 kernel/time/timer.c:1817 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830 __do_softirq+0x23b/0x6b7 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x195/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:539 [inline] smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x45/0x60 kernel/locking/spinlock.c:199 Code: 08 00 74 0c 48 c7 c7 90 3b eb 85 e8 35 01 43 fd 48 83 3d 9d 1e 9a 01 00 74 29 48 89 df e8 93 d6 fa fc 66 90 fb bf 01 00 00 00 16 c3 f3 fc 65 8b 05 7b 70 b1 7b 85 c0 74 02 5b c3 e8 04 37 af RSP: 0018:ffff8881dfa474b0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: ffff8881f6e57b40 RCX: dffffc0000000000 RDX: 0000000040000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffff8881dfa47510 R08: ffffffff81799679 R09: fffffbfff0c96e7b R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f6e57b40 R13: ffff8881e237ee40 R14: dffffc0000000000 R15: 0000000000000000 finish_lock_switch kernel/sched/core.c:3347 [inline] finish_task_switch+0x130/0x590 kernel/sched/core.c:3447 context_switch kernel/sched/core.c:3611 [inline] __schedule+0xb0d/0x1320 kernel/sched/core.c:4307 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:4456 preempt_schedule+0xd9/0xe0 kernel/sched/core.c:4481 ___preempt_schedule+0x16/0x20 arch/x86/entry/thunk_64.S:50 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] _raw_spin_unlock_irqrestore+0x6f/0x80 kernel/locking/spinlock.c:191 spin_unlock_irqrestore include/linux/spinlock.h:393 [inline] release_pages+0x1aa/0xb20 mm/swap.c:778 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:189 [inline] tlb_flush_mmu mm/mmu_gather.c:196 [inline] tlb_finish_mmu+0x177/0x320 mm/mmu_gather.c:277 exit_mmap+0x2dc/0x520 mm/mmap.c:3193 __mmput+0x8e/0x2c0 kernel/fork.c:1101 exit_mm kernel/exit.c:536 [inline] do_exit+0xc08/0x2bc0 kernel/exit.c:846 do_group_exit+0x138/0x300 kernel/exit.c:982 get_signal+0xdb1/0x1440 kernel/signal.c:2735 do_signal+0xb0/0x11f0 arch/x86/kernel/signal.c:809 exit_to_usermode_loop+0xc0/0x1a0 arch/x86/entry/common.c:159 prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194 ret_from_intr+0x1c/0x1c RIP: 0033:0x7f48793dcb99 Code: Bad RIP value. RSP: 002b:00007f487865e048 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 00007f487956afa0 RCX: 00007f48793dcb99 RDX: 00000000200006c0 RSI: 0000000000005452 RDI: 0000000000000005 RBP: 00007f487945d77e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f487956afa0 R15: 00007ffe6e5c6e28 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 1759 Comm: udevd Not tainted 5.4.276-syzkaller-00021-g58de09405d1e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:entry_SYSCALL_64_after_hwframe+0x57/0xc1 Code: 45 31 e4 45 31 ed 45 31 f6 45 31 ff 48 89 c7 48 89 e6 66 90 b9 48 00 00 00 65 48 8b 14 25 a8 8d 02 00 89 d0 48 c1 ea 20 0f 30 e0 6e a0 fc 48 8b 4c 24 58 4c 8b 9c 24 80 00 00 00 49 39 cb 0f RSP: 0018:ffff8881da34ff58 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000048 RDX: 0000000000000000 RSI: ffff8881da34ff58 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007efc3033cc80(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff2fd91fa4 CR3: 00000001df9be000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: