IPVS: sed: UDP 224.0.0.2:0 - no destination available IPVS: sed: UDP 224.0.0.2:0 - no destination available IPVS: sed: UDP 224.0.0.2:0 - no destination available IPVS: sed: UDP 224.0.0.2:0 - no destination available rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-...!: (1 GPs behind) idle=68ec/1/0x4000000000000000 softirq=37542/37543 fqs=29 rcu: (detected by 0, t=10502 jiffies, g=33133, q=905 ncpus=2) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 9600 Comm: syz.8.1113 Not tainted 6.13.0-rc3-syzkaller-00026-g59dbb9d81adf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 RIP: 0010:rb_next+0x4/0xf0 lib/rbtree.c:493 Code: 42 80 3c 38 00 74 e3 48 89 df e8 87 3d 42 f6 eb d9 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <41> 57 41 56 41 54 53 49 89 fc 49 bf 00 00 00 00 00 fc ff df 48 89 RSP: 0018:ffffc90000a18d00 EFLAGS: 00000006 RAX: ffffffff8bc41b31 RBX: ffff8880b872c9d8 RCX: ffff8880257f0000 RDX: 0000000000010000 RSI: ffff88806f8ec340 RDI: ffff88806f8ec340 RBP: dffffc0000000000 R08: ffffffff8bc41af8 R09: 1ffffffff2032f36 R10: dffffc0000000000 R11: fffffbfff2032f37 R12: 1ffff1100df1d868 R13: ffff88806f8ec340 R14: ffff8880b872c9d0 R15: 1ffff110170e593b FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c25ad8c CR3: 000000007c518000 CR4: 0000000000350ef0 Call Trace: rb_erase_cached include/linux/rbtree.h:124 [inline] timerqueue_del+0x89/0x100 lib/timerqueue.c:57 __remove_hrtimer kernel/time/hrtimer.c:1109 [inline] __run_hrtimer kernel/time/hrtimer.c:1719 [inline] __hrtimer_run_queues+0x3d0/0xd30 kernel/time/hrtimer.c:1803 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x112/0x420 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] RIP: 0010:rcu_is_watching+0x10/0xb0 kernel/rcu/tree.c:737 Code: 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 ff 05 e8 c6 7e 7e 7b 78 43 0a 89 c3 83 f8 08 73 7a 49 bf 00 00 00 00 00 fc ff df RSP: 0018:ffffc900049d72b0 EFLAGS: 00000282 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff8880257f0000 RDX: ffff8880257f0000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900049d7610 R08: ffffffff821164b6 R09: 1ffff11003d9288f R10: dffffc0000000000 R11: ffffed1003d92890 R12: 8000000079da7025 R13: 0000000000000000 R14: 1ffffd40003ced3b R15: 1ffff1100fe07253 rcu_read_unlock include/linux/rcupdate.h:878 [inline] page_ext_put+0x2f/0xc0 mm/page_ext.c:550 get_and_clear_full_ptes include/linux/pgtable.h:705 [inline] zap_present_folio_ptes mm/memory.c:1502 [inline] zap_present_ptes mm/memory.c:1585 [inline] zap_pte_range mm/memory.c:1627 [inline] zap_pmd_range mm/memory.c:1753 [inline] zap_pud_range mm/memory.c:1782 [inline] zap_p4d_range mm/memory.c:1803 [inline] unmap_page_range+0x2c2e/0x4040 mm/memory.c:1824 unmap_vmas+0x3cc/0x5f0 mm/memory.c:1914 exit_mmap+0x275/0xc20 mm/mmap.c:1668 __mmput+0x115/0x3c0 kernel/fork.c:1353 exit_mm+0x220/0x310 kernel/exit.c:570 do_exit+0x9b2/0x28e0 kernel/exit.c:925 do_group_exit+0x207/0x2c0 kernel/exit.c:1087 get_signal+0x16b2/0x1750 kernel/signal.c:3017 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f127e785d29 Code: Unable to access opcode bytes at 0x7f127e785cff. RSP: 002b:00007f127f5bc0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007f127e975fa8 RCX: 00007f127e785d29 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f127e975fac RBP: 00007f127e975fa0 R08: 7fffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f127e975fac R13: 0000000000000000 R14: 00007fffcb852840 R15: 00007fffcb852928 rcu: rcu_preempt kthread starved for 10444 jiffies! g33133 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 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:26264 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 rcu: Stack dump where RCU GP kthread last ran: CPU: 0 UID: 0 PID: 9609 Comm: syz.3.1112 Not tainted 6.13.0-rc3-syzkaller-00026-g59dbb9d81adf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 RIP: 0010:__sanitizer_cov_trace_pc+0x53/0x70 kernel/kcov.c:223 Code: b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc 15 00 00 48 39 cf <73> 08 48 89 3a 48 89 44 f2 08 e9 b9 cc 50 0a 66 2e 0f 1f 84 00 00 RSP: 0018:ffffc9000302f978 EFLAGS: 00000246 RAX: ffffffff81938f0b RBX: 1ffff110170e88e9 RCX: 0000000000080000 RDX: ffffc9000ec6a000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: ffffc9000302fb80 R08: ffffffff81938eda R09: 1ffffffff2854710 R10: dffffc0000000000 R11: fffffbfff2854711 R12: dffffc0000000000 R13: ffff8880b8744748 R14: ffff8880b863fac0 R15: 0000000000000001 FS: 00007f5d60ff66c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5d60ff5f98 CR3: 000000002964e000 CR4: 0000000000350ef0 Call Trace: csd_lock_wait kernel/smp.c:340 [inline] smp_call_function_many_cond+0x1a0b/0x2c60 kernel/smp.c:884 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2114 [inline] text_poke_bp_batch+0x352/0xb30 arch/x86/kernel/alternative.c:2324 text_poke_flush arch/x86/kernel/alternative.c:2515 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2522 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_slow_inc_cpuslocked+0x80/0xf0 kernel/jump_label.c:168 static_key_slow_inc+0x1a/0x30 kernel/jump_label.c:191 io_uring_create+0xf2/0xc00 io_uring/io_uring.c:3641 io_uring_setup io_uring/io_uring.c:3806 [inline] __do_sys_io_uring_setup io_uring/io_uring.c:3833 [inline] __se_sys_io_uring_setup+0x2ba/0x330 io_uring/io_uring.c:3827 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5d63185d29 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:00007f5d60ff5fc8 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 RAX: ffffffffffffffda RBX: 00007f5d63376160 RCX: 00007f5d63185d29 RDX: 00000000200005c0 RSI: 0000000020000280 RDI: 0000000000000a95 RBP: 0000000020000280 R08: 0000000000000000 R09: 00000000200005c0 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000020000340 R14: 0000000000000a95 R15: 00000000200005c0 IPVS: sed: UDP 224.0.0.2:0 - no destination available IPVS: sed: UDP 224.0.0.2:0 - no destination available IPVS: sed: UDP 224.0.0.2:0 - no destination available IPVS: sed: UDP 224.0.0.2:0 - no destination available IPVS: sed: UDP 224.0.0.2:0 - no destination available IPVS: sed: UDP 224.0.0.2:0 - no destination available IPVS: sed: UDP 224.0.0.2:0 - no destination available IPVS: sed: UDP 224.0.0.2:0 - no destination available IPVS: sed: UDP 224.0.0.2:0 - no destination available