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: 1-...!: (0 ticks this GP) idle=cce4/1/0x4000000000000000 softirq=49404/49404 fqs=0 rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P13236/3:b..l rcu: (detected by 0, t=10502 jiffies, g=52549, q=215 ncpus=2) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 13178 Comm: syz.2.2097 Not tainted 6.14.0-rc2-syzkaller-00281-g496659003dac #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 RIP: 0010:__raw_callee_save___pv_queued_spin_unlock+0x12/0x18 Code: 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 52 b8 01 00 00 00 31 d2 f0 0f b0 17 75 06 <5a> c3 cc cc cc cc 56 0f b6 f0 e8 9f ff ff ff 5e 5a c3 cc cc cc cc RSP: 0018:ffffc90000a18cb8 EFLAGS: 00000046 RAX: 0000000000000001 RBX: ffffffff9aadc7c8 RCX: ffffffff81971eb3 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff9aadc7c8 RBP: ffffffff9aadc7d0 R08: 0000000000000000 R09: fffffbfff355b8f9 R10: ffffffff9aadc7cb R11: 0000000000000001 R12: ffffffff9aadc7d8 R13: ffff88807cdc6340 R14: 1ffff920001431a4 R15: ffffffff9aadc7c0 FS: 00007f7cacfb06c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000400000f54030 CR3: 0000000034cf0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_queued_spin_unlock arch/x86/include/asm/paravirt.h:582 [inline] queued_spin_unlock arch/x86/include/asm/qspinlock.h:57 [inline] do_raw_spin_unlock+0x172/0x230 kernel/locking/spinlock_debug.c:142 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_unlock_irqrestore+0x22/0x80 kernel/locking/spinlock.c:194 debug_object_activate+0x2e6/0x4a0 lib/debugobjects.c:836 debug_hrtimer_activate kernel/time/hrtimer.c:455 [inline] debug_activate kernel/time/hrtimer.c:496 [inline] enqueue_hrtimer+0x25/0x3c0 kernel/time/hrtimer.c:1100 __run_hrtimer kernel/time/hrtimer.c:1818 [inline] __hrtimer_run_queues+0x903/0xae0 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:__sanitizer_cov_trace_const_cmp4+0xa/0x20 kernel/kcov.c:314 Code: 00 00 00 e9 58 fe ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 0c 24 89 f2 <89> fe bf 05 00 00 00 e9 2a fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 RSP: 0018:ffffc9000b2ff9f8 EFLAGS: 00000246 RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffff8927e850 RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffc9000b2ffd98 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000400000f548c0 R14: ffffc9000b2ffddc R15: 0000000000000002 ____sys_recvmsg+0x2d0/0x6b0 net/socket.c:2806 ___sys_recvmsg+0x115/0x1a0 net/socket.c:2835 do_recvmmsg+0x2f8/0x740 net/socket.c:2930 __sys_recvmmsg net/socket.c:3004 [inline] __do_sys_recvmmsg net/socket.c:3027 [inline] __se_sys_recvmmsg net/socket.c:3020 [inline] __x64_sys_recvmmsg+0x239/0x290 net/socket.c:3020 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: 0033:0x7f7cac18cde9 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:00007f7cacfb0038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f7cac3a6080 RCX: 00007f7cac18cde9 RDX: 03fffffffffffeda RSI: 00004000000000c0 RDI: 0000000000000003 RBP: 00007f7cac20e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7cac3a6080 R15: 00007ffd1bcc7e78 task:syz.3.2116 state:R running task stack:25808 pid:13236 tgid:13235 ppid:5828 task_flags:0x400040 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5377 [inline] __schedule+0xf43/0x5890 kernel/sched/core.c:6764 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6943 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186 spin_unlock include/linux/spinlock.h:391 [inline] filemap_map_pages+0xe4e/0x16b0 mm/filemap.c:3823 do_fault_around mm/memory.c:5350 [inline] do_read_fault mm/memory.c:5383 [inline] do_fault mm/memory.c:5526 [inline] do_pte_missing+0xdb8/0x3e10 mm/memory.c:4047 handle_pte_fault mm/memory.c:5889 [inline] __handle_mm_fault+0x1166/0x2c60 mm/memory.c:6032 handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6201 faultin_page mm/gup.c:1196 [inline] __get_user_pages+0x773/0x36f0 mm/gup.c:1491 populate_vma_page_range+0x27f/0x3a0 mm/gup.c:1929 __mm_populate+0x1d6/0x380 mm/gup.c:2032 mm_populate include/linux/mm.h:3386 [inline] vm_mmap_pgoff+0x2d3/0x3a0 mm/util.c:580 ksys_mmap_pgoff+0x7d/0x5c0 mm/mmap.c:607 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline] __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82 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: 0033:0x7fc6c438cde9 RSP: 002b:00007fc6c5188038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007fc6c45a5fa0 RCX: 00007fc6c438cde9 RDX: b635773f06ebbeef RSI: 0000000000b36000 RDI: 0000400000000000 RBP: 00007fc6c440e2a0 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc6c45a5fa0 R15: 00007ffcfcbad628 rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g52549 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=1 timer-softirq=40895 rcu: rcu_preempt kthread starved for 10502 jiffies! g52549 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:28344 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 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