IPVS: ovf: UDP 224.0.0.2:0 - no destination available IPVS: ovf: UDP 224.0.0.2:0 - no destination available IPVS: ovf: UDP 224.0.0.2:0 - no destination available IPVS: ovf: UDP 224.0.0.2:0 - no destination available rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...!: (1 ticks this GP) idle=b654/1/0x4000000000000000 softirq=131036/131036 fqs=23 rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P21186/1:b..l P12312/1:b..l rcu: (detected by 1, t=10502 jiffies, g=147385, q=1002 ncpus=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 21181 Comm: syz.7.3983 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:__sanitizer_cov_trace_pc+0xb/0x70 kernel/kcov.c:213 Code: 62 00 be 03 00 00 00 5b e9 92 ab f0 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 8b 05 c5 1f 01 12 <48> 8b 34 24 65 48 8b 15 a1 1f 01 12 a9 00 01 ff 00 74 1b f6 c4 01 RSP: 0018:ffffc90000007e18 EFLAGS: 00000002 RAX: 0000000000010001 RBX: ffff888079c1b300 RCX: ffffffff8b854fec RDX: 18b5a31800123970 RSI: 18b5a3180012b971 RDI: ffff88802f2eca80 RBP: 18b5a31800123970 R08: 0000000000000006 R09: 18b5a3180012b971 R10: 18b5a31800123970 R11: 0000000000000001 R12: ffff88804019e300 R13: dffffc0000000000 R14: 18b5a3180012b971 R15: ffff8880b8428658 FS: 00007f8ee38956c0(0000) GS:ffff888124383000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1899fea540 CR3: 0000000091bc1000 CR4: 00000000003526f0 Call Trace: __rb_add include/linux/rbtree.h:234 [inline] rb_add_linked include/linux/rbtree.h:281 [inline] timerqueue_linked_add+0xd6/0x430 lib/timerqueue.c:96 enqueue_hrtimer+0x1ad/0x2f0 kernel/time/hrtimer.c:1117 __run_hrtimer kernel/time/hrtimer.c:1946 [inline] __hrtimer_run_queues+0x73d/0xa00 kernel/time/hrtimer.c:1994 hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2113 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] __sysvec_apic_timer_interrupt+0x10b/0x460 arch/x86/kernel/apic/apic.c:1067 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline] sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1061 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:lock_is_held_type+0xf5/0x140 kernel/locking/lockdep.c:5945 Code: ff ff ff ff 65 0f c1 15 f1 a5 80 08 83 fa 01 8b 44 24 04 75 2d 9c 5a 80 e6 02 75 47 41 f7 c5 00 02 00 00 74 01 fb 48 83 c4 08 <5b> 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc e9 d7 3a 03 00 31 c0 RSP: 0018:ffffc900078ffbf8 EFLAGS: 00000282 RAX: 0000000000000000 RBX: ffffffff8e7e5500 RCX: 0000000000000001 RDX: 0000000000000046 RSI: ffffffff8deea396 RDI: ffffffff8c1c4680 RBP: ffff88802f2eca80 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff R13: 0000000000000246 R14: 00002000001321c0 R15: 0000000000010106 lock_is_held include/linux/lockdep.h:249 [inline] __might_resched+0x248/0x330 kernel/sched/core.c:9125 do_recvmmsg+0x525/0x760 net/socket.c:3089 __sys_recvmmsg net/socket.c:3129 [inline] __do_sys_recvmmsg net/socket.c:3152 [inline] __se_sys_recvmmsg net/socket.c:3145 [inline] __x64_sys_recvmmsg+0x22a/0x280 net/socket.c:3145 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8ee299ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8ee3895028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f8ee2c16090 RCX: 00007f8ee299ce59 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000006 RBP: 00007f8ee2a32d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8ee2c16128 R14: 00007f8ee2c16090 R15: 00007ffdd1173a08 task:syz-executor state:R running task stack:23928 pid:12312 tgid:12312 ppid:12311 task_flags:0x400140 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1295/0x67a0 kernel/sched/core.c:7189 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x205/0x970 kernel/entry/common.c:164 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:write_comp_data+0x0/0x90 kernel/kcov.c:246 Code: ee 26 01 12 48 8b 80 e0 16 00 00 c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <65> 8b 05 d9 26 01 12 49 89 f8 49 89 f1 49 89 d2 65 48 8b 3d b0 26 RSP: 0018:ffffc90003b17608 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc90003b176f0 RCX: ffffffff8b877c34 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 00000000000011f5 R08: 0000000000000006 R09: 00000000000011f5 R10: fffffffffffffffe R11: 0000000000000000 R12: fffffffffffffffe R13: ffffc90003b17702 R14: 0000000000000000 R15: 0000000000000035 xas_find+0x134/0x8e0 lib/xarray.c:1409 find_get_entry mm/filemap.c:2068 [inline] find_lock_entries+0x176/0x1190 mm/filemap.c:2172 shmem_undo_range+0x212/0x1570 mm/shmem.c:1131 shmem_truncate_range mm/shmem.c:1277 [inline] shmem_evict_inode+0x3f3/0xc40 mm/shmem.c:1407 evict+0x3c2/0xad0 fs/inode.c:841 iput_final fs/inode.c:1960 [inline] iput.part.0+0x605/0xf50 fs/inode.c:2009 iput+0x35/0x40 fs/inode.c:1975 filename_unlinkat+0x466/0x730 fs/namei.c:5572 __do_sys_unlink fs/namei.c:5603 [inline] __se_sys_unlink fs/namei.c:5600 [inline] __x64_sys_unlink+0x46/0x70 fs/namei.c:5600 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5f51f9bf47 RSP: 002b:00007fff9607e268 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5f51f9bf47 RDX: 00007fff9607e290 RSI: 00007fff9607e320 RDI: 00007fff9607e320 RBP: 00007fff9607e320 R08: 00007fff9607f320 R09: 00000000ffffffff R10: 0000000000000100 R11: 0000000000000206 R12: 00007fff9607f3b0 R13: 00007f5f520321ca R14: 000000000015460f R15: 00007fff9607f3f0 task:syz.7.3983 state:R running task stack:26896 pid:21186 tgid:21178 ppid:12310 task_flags:0x400140 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1295/0x67a0 kernel/sched/core.c:7189 preempt_schedule_common+0x42/0xc0 kernel/sched/core.c:7370 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 vprintk_emit+0x438/0x6b0 kernel/printk/printk.c:2480 _printk+0xcf/0x110 kernel/printk/printk.c:2504 __nla_validate_parse.cold+0x95/0xa9 lib/nlattr.c:647 __nla_parse+0x40/0x60 lib/nlattr.c:732 nla_parse_deprecated include/net/netlink.h:736 [inline] nfnetlink_rcv_msg+0x4a9/0x11e0 net/netfilter/nfnetlink.c:273 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2555 nfnetlink_rcv+0x1b3/0x440 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1899 sock_sendmsg_nosec net/socket.c:787 [inline] __sock_sendmsg net/socket.c:802 [inline] ____sys_sendmsg+0x9e1/0xb70 net/socket.c:2698 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2752 __sys_sendmsg+0x170/0x220 net/socket.c:2784 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8ee299ce59 RSP: 002b:00007f8ee3874028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f8ee2c16180 RCX: 00007f8ee299ce59 RDX: 0000000000048810 RSI: 0000200000000140 RDI: 000000000000000a RBP: 00007f8ee2a32d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8ee2c16218 R14: 00007f8ee2c16180 R15: 00007ffdd1173a08 rcu: rcu_preempt kthread starved for 10385 jiffies! g147385 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:27592 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1295/0x67a0 kernel/sched/core.c:7189 __schedule_loop kernel/sched/core.c:7268 [inline] schedule+0xdd/0x390 kernel/sched/core.c:7283 schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095 rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 rcu: Stack dump where RCU GP kthread last ran: CPU: 1 UID: 60929 PID: 21183 Comm: syz.2.3984 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210 Code: f6 7f 5c 00 48 89 df 5b e9 bd 10 62 00 be 03 00 00 00 5b e9 92 ab f0 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 65 8b 05 c5 1f 01 12 48 8b 34 24 65 48 8b 15 a1 1f 01 RSP: 0018:ffffc900078672f0 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81fc2c4d RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888032718000 RBP: ffff8880b8443360 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003 R13: ffffed101708866d R14: 0000000000000001 R15: ffff8880b853c600 FS: 0000000000000000(0000) GS:ffff888124483000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f54cd24c7c4 CR3: 0000000038800000 CR4: 00000000003526f0 Call Trace: native_pause arch/x86/include/asm/vdso/processor.h:13 [inline] cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline] csd_lock_wait kernel/smp.c:342 [inline] smp_call_function_many_cond+0x587/0x1700 kernel/smp.c:892 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1057 __flush_tlb_multi arch/x86/include/asm/paravirt.h:46 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline] flush_tlb_mm_range+0x45f/0x16f0 arch/x86/mm/tlb.c:1451 tlb_flush arch/x86/include/asm/tlb.h:23 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:509 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:499 [inline] zap_pte_range mm/memory.c:1961 [inline] zap_pmd_range mm/memory.c:2020 [inline] zap_pud_range mm/memory.c:2048 [inline] zap_p4d_range mm/memory.c:2069 [inline] __zap_vma_range+0x23c8/0x4a30 mm/memory.c:2109 unmap_vmas+0x299/0x5f0 mm/memory.c:2178 exit_mmap+0x1ef/0xa10 mm/mmap.c:1300 __mmput+0x12a/0x410 kernel/fork.c:1178 mmput+0x67/0x80 kernel/fork.c:1201 exit_mm kernel/exit.c:582 [inline] do_exit+0x8b2/0x2af0 kernel/exit.c:964 do_group_exit+0xd5/0x2a0 kernel/exit.c:1119 get_signal+0x20ff/0x2210 kernel/signal.c:3037 arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x98/0x670 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline] do_syscall_64+0x666/0x870 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f24e2f9ce59 Code: Unable to access opcode bytes at 0x7f24e2f9ce2f. RSP: 002b:00007f24e11f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: 000000000019feb4 RBX: 00007f24e3215fa0 RCX: 00007f24e2f9ce59 RDX: 00000000fffffd9d RSI: 0000200000000200 RDI: 0000000000000003 RBP: 00007f24e3032d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f24e3216038 R14: 00007f24e3215fa0 R15: 00007ffd57d6ef28 IPVS: ovf: UDP 224.0.0.2:0 - no destination available IPVS: ovf: UDP 224.0.0.2:0 - no destination available IPVS: ovf: UDP 224.0.0.2:0 - no destination available IPVS: ovf: UDP 224.0.0.2:0 - no destination available IPVS: ovf: UDP 224.0.0.2:0 - no destination available IPVS: ovf: UDP 224.0.0.2:0 - no destination available IPVS: ovf: UDP 224.0.0.2:0 - no destination available IPVS: ovf: UDP 224.0.0.2:0 - no destination available