IPVS: lblc: UDP 224.0.0.2:0 - no destination available IPVS: lblc: UDP 224.0.0.2:0 - no destination available IPVS: lblc: UDP 224.0.0.2:0 - no destination available IPVS: lblc: UDP 224.0.0.2:0 - no destination available rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...!: (0 ticks this GP) idle=6a6c/1/0x4000000000000000 softirq=59140/59147 fqs=0 rcu: (detected by 1, t=10502 jiffies, g=40461, q=328 ncpus=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 11805 Comm: syz.3.1674 Not tainted 6.14.0-rc1-syzkaller-00235-g9946eaf552b1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 RIP: 0010:rb_erase_cached include/linux/rbtree.h:123 [inline] RIP: 0010:timerqueue_del+0x67/0x150 lib/timerqueue.c:57 Code: 1e 67 f6 49 39 dc 0f 84 af 00 00 00 e8 32 24 67 f6 4c 8d 65 08 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 00 <0f> 85 a3 00 00 00 48 39 5d 08 74 58 e8 08 24 67 f6 48 89 ee 48 89 RSP: 0018:ffffc90000007dd0 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffff88806c91b340 RCX: ffffffff8b52afa0 RDX: 1ffff110170c58fb RSI: ffffffff8b52afae RDI: 0000000000000006 RBP: ffff8880b862c7d0 R08: 0000000000000006 R09: ffff8880352f6c00 R10: ffff88806c91b340 R11: 0000000000000003 R12: ffff8880b862c7d8 R13: 0000000000000000 R14: ffff8880b862c680 R15: 0000000000000000 FS: 00007f06bc8c26c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f22dcb70ba0 CR3: 00000000595f8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __remove_hrtimer+0x99/0x290 kernel/time/hrtimer.c:1133 __run_hrtimer kernel/time/hrtimer.c:1781 [inline] __hrtimer_run_queues+0x50b/0xae0 kernel/time/hrtimer.c:1865 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1927 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:arch_atomic64_read arch/x86/include/asm/atomic64_64.h:15 [inline] RIP: 0010:raw_atomic64_read include/linux/atomic/atomic-arch-fallback.h:2583 [inline] RIP: 0010:raw_atomic_long_read include/linux/atomic/atomic-long.h:38 [inline] RIP: 0010:atomic_long_read include/linux/atomic/atomic-instrumented.h:3189 [inline] RIP: 0010:__mutex_owner kernel/locking/mutex.h:47 [inline] RIP: 0010:mutex_spin_on_owner+0x94/0x310 kernel/locking/mutex.c:334 Code: 49 bf 00 00 00 00 00 fc ff df 4d 89 f5 49 c1 ed 03 4d 01 fd 48 85 db 0f 84 71 01 00 00 be 08 00 00 00 48 89 df e8 dc d2 87 00 <48> 89 d8 48 c1 e8 03 42 80 3c 38 00 0f 85 02 02 00 00 48 8b 03 48 RSP: 0018:ffffc9000483fa88 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffffffff8fef5580 RCX: ffffffff819520f4 RDX: fffffbfff1fdeab1 RSI: 0000000000000008 RDI: ffffffff8fef5580 RBP: ffff88807a5a8000 R08: 0000000000000000 R09: fffffbfff1fdeab0 R10: ffffffff8fef5587 R11: 0000000000000001 R12: 0000000000000000 R13: ffffed100676e000 R14: ffff888033b70000 R15: dffffc0000000000 mutex_optimistic_spin kernel/locking/mutex.c:451 [inline] __mutex_lock_common kernel/locking/mutex.c:589 [inline] __mutex_lock+0x319/0xb10 kernel/locking/mutex.c:730 tc_action_net_exit include/net/act_api.h:173 [inline] ct_exit_net+0x26/0x3b0 net/sched/act_ct.c:1647 ops_exit_list+0x128/0x180 net/core/net_namespace.c:177 setup_net+0x4fe/0x860 net/core/net_namespace.c:394 copy_net_ns+0x2b4/0x6c0 net/core/net_namespace.c:516 create_new_namespaces+0x3ea/0xad0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc0/0x1f0 kernel/nsproxy.c:228 ksys_unshare+0x45d/0xa40 kernel/fork.c:3342 __do_sys_unshare kernel/fork.c:3413 [inline] __se_sys_unshare kernel/fork.c:3411 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:3411 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f06bb98cde9 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:00007f06bc8c2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007f06bbba5fa0 RCX: 00007f06bb98cde9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000068040200 RBP: 00007f06bba0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f06bbba5fa0 R15: 00007ffcead60ee8 rcu: rcu_preempt kthread starved for 10502 jiffies! g40461 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:27456 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5377 [inline] __schedule+0xf43/0x5890 kernel/sched/core.c:6764 __schedule_loop kernel/sched/core.c:6841 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6856 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2024 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2226 kthread+0x3af/0x750 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 rcu: Stack dump where RCU GP kthread last ran: CPU: 1 UID: 0 PID: 11920 Comm: rm Not tainted 6.14.0-rc1-syzkaller-00235-g9946eaf552b1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0x4c6/0x12c0 kernel/smp.c:885 Code: 0c 00 85 ed 74 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 fc 4c 89 fd 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 fc 04 0c 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 e8 0b 00 00 8b 43 08 31 RSP: 0018:ffffc9000488fa40 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff8880b8646a00 RCX: ffffffff81adcf0a RDX: ffff888058f84880 RSI: ffffffff81adcee4 RDI: 0000000000000005 RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffffed10170c8d41 R13: 0000000000000001 R14: ffff8880b873fe80 R15: ffff8880b8646a08 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5cecd19870 CR3: 000000000df80000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1052 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline] flush_tlb_multi arch/x86/mm/tlb.c:966 [inline] flush_tlb_mm_range+0x271/0x4a0 arch/x86/mm/tlb.c:1054 tlb_flush arch/x86/include/asm/tlb.h:20 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:481 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:471 [inline] tlb_flush_mmu mm/mmu_gather.c:395 [inline] tlb_finish_mmu+0x3c9/0x7b0 mm/mmu_gather.c:488 exit_mmap+0x40e/0xba0 mm/mmap.c:1297 __mmput+0x12a/0x410 kernel/fork.c:1356 mmput+0x62/0x70 kernel/fork.c:1378 exit_mm kernel/exit.c:570 [inline] do_exit+0x9ba/0x2d70 kernel/exit.c:925 do_group_exit+0xd3/0x2a0 kernel/exit.c:1087 __do_sys_exit_group kernel/exit.c:1098 [inline] __se_sys_exit_group kernel/exit.c:1096 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1096 x64_sys_call+0x151f/0x1720 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5cecc22a90 Code: Unable to access opcode bytes at 0x7f5cecc22a66. RSP: 002b:00007ffcfc1b1f28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f5cecd13860 RCX: 00007f5cecc22a90 RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000000 RBP: 00007f5cecd13860 R08: 0000000000000000 R09: 96328bbb0b6478d6 R10: 00007ffcfc1b1de0 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f5cecd17658 R15: 0000000000000001 IPVS: lblc: UDP 224.0.0.2:0 - no destination available IPVS: lblc: UDP 224.0.0.2:0 - no destination available IPVS: lblc: UDP 224.0.0.2:0 - no destination available IPVS: lblc: UDP 224.0.0.2:0 - no destination available IPVS: lblc: UDP 224.0.0.2:0 - no destination available IPVS: lblc: UDP 224.0.0.2:0 - no destination available IPVS: lblc: UDP 224.0.0.2:0 - no destination available IPVS: lblc: UDP 224.0.0.2:0 - no destination available IPVS: lblc: UDP 224.0.0.2:0 - no destination available IPVS: lblc: UDP 224.0.0.2:0 - no destination available