rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5823/1:b..l P11360/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=26665, q=455 ncpus=2)
task:syz.5.2415      state:R  running task     stack:25952 pid:11360 tgid:11359 ppid:5824   flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6756
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7078
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_is_held_type+0x13b/0x190
Code: 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 42 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc9000445f700 EFLAGS: 00000206
RAX: 2c688f5ab1c3b900 RBX: 0000000000000000 RCX: 0000000080000000
RDX: dffffc0000000000 RSI: ffffffff8c0aaae0 RDI: ffffffff8c5fb0e0
RBP: 0000000000000003 R08: ffffffff942a4887 R09: 1ffffffff2854910
R10: dffffc0000000000 R11: fffffbfff2854911 R12: 0000000000000246
R13: ffff88802ee7da00 R14: 00000000ffffffff R15: ffffffff8e96e828
 lock_is_held include/linux/lockdep.h:249 [inline]
 task_css include/linux/cgroup.h:434 [inline]
 mem_cgroup_from_task+0x62/0x120 mm/memcontrol.c:892
 get_mem_cgroup_from_mm+0xd7/0x2a0 mm/memcontrol.c:945
 __mem_cgroup_charge+0x16/0x80 mm/memcontrol.c:4511
 mem_cgroup_charge include/linux/memcontrol.h:646 [inline]
 shmem_alloc_and_add_folio+0x89e/0x1080 mm/shmem.c:1847
 shmem_get_folio_gfp+0x621/0x1840 mm/shmem.c:2357
 shmem_get_folio mm/shmem.c:2463 [inline]
 shmem_write_begin+0x165/0x350 mm/shmem.c:3119
 generic_perform_write+0x348/0x990 mm/filemap.c:4055
 shmem_file_write_iter+0xf9/0x120 mm/shmem.c:3295
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0xaed/0xd30 fs/read_write.c:679
 ksys_write+0x18f/0x2b0 fs/read_write.c:731
 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: 0033:0x7f950d9847df
RSP: 002b:00007f950e810df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000100000 RCX: 00007f950d9847df
RDX: 0000000000100000 RSI: 00007f9503200000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000a99
R10: 0000000020002002 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f950e810ef0 R14: 00007f950e810eb0 R15: 00007f9503200000
 </TASK>
task:syz-executor    state:R  running task     stack:12784 pid:5823  tgid:5823  ppid:5816   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6756
 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6935
 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6959
 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]
 copy_pte_range mm/memory.c:1200 [inline]
 copy_pmd_range+0x6dc8/0x77a0 mm/memory.c:1261
 copy_pud_range mm/memory.c:1298 [inline]
 copy_p4d_range mm/memory.c:1322 [inline]
 copy_page_range+0x99f/0xe90 mm/memory.c:1420
 dup_mmap kernel/fork.c:748 [inline]
 dup_mm kernel/fork.c:1691 [inline]
 copy_mm+0x1126/0x1fd0 kernel/fork.c:1743
 copy_process+0x1845/0x3d50 kernel/fork.c:2394
 kernel_clone+0x226/0x8e0 kernel/fork.c:2806
 __do_sys_clone kernel/fork.c:2949 [inline]
 __se_sys_clone kernel/fork.c:2933 [inline]
 __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2933
 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: 0033:0x7f97a897c593
RSP: 002b:00007ffd38349c38 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f97a897c593
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055555ea617d0 R11: 0000000000000246 R12: 0000000000000000
R13: 000055555ea74590 R14: 00007ffd38349dc0 R15: 00000000000001a4
 </TASK>
rcu: rcu_preempt kthread starved for 8882 jiffies! g26665 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:25840 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 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
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5888 Comm: kworker/1:3 Not tainted 6.13.0-rc5-syzkaller-00004-gccb98ccef0e5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_long defense_work_handler
RIP: 0010:unwind_next_frame+0x5/0x22d0 arch/x86/kernel/unwind_orc.c:469
Code: 80 e1 07 80 c1 03 38 c1 7c 91 4c 89 f7 e8 13 33 ba 00 eb 87 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <41> 57 41 56 41 55 41 54 53 48 81 ec 98 00 00 00 49 89 fd 49 bc 00
RSP: 0018:ffffc90000a18510 EFLAGS: 00000002
RAX: 0000000000000001 RBX: ffffc90000a18520 RCX: ffffffff91792000
RDX: dffffc0000000000 RSI: ffffffff818d031a RDI: ffffc90000a18520
RBP: ffffc90000a185b0 R08: 0000000000000006 R09: ffffc90000a18610
R10: dffffc0000000000 R11: ffffffff818b39d0 R12: ffff88805a9e1e00
R13: ffffffff818b39d0 R14: ffffc90000a18600 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fe13ff8 CR3: 000000000e736000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:582
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2353 [inline]
 slab_free mm/slub.c:4613 [inline]
 kfree+0x196/0x430 mm/slub.c:4761
 dummy_timer+0x7f4/0x4620 drivers/usb/gadget/udc/dummy_hcd.c:1987
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x59d/0xd30 kernel/time/hrtimer.c:1803
 hrtimer_run_softirq+0x19a/0x2c0 kernel/time/hrtimer.c:1820
 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:561
 __do_softirq kernel/softirq.c:595 [inline]
 invoke_softirq kernel/softirq.c:435 [inline]
 __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:preempt_schedule_irq+0xf6/0x1c0 kernel/sched/core.c:7078
Code: 89 f5 49 c1 ed 03 eb 0d 48 f7 03 08 00 00 00 0f 84 8b 00 00 00 bf 01 00 00 00 e8 15 b4 a3 f5 e8 60 61 dd f5 fb bf 01 00 00 00 <e8> 85 ab ff ff 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 d5 0f 3c f6 48
RSP: 0018:ffffc90002ee7800 EFLAGS: 00000286
RAX: 22063abb71069100 RBX: 1ffff920005dcf08 RCX: ffffffff817b274a
RDX: dffffc0000000000 RSI: ffffffff8c0a98e0 RDI: 0000000000000001
RBP: ffffc90002ee78c0 R08: ffffffff942a4927 R09: 1ffffffff2854924
R10: dffffc0000000000 R11: fffffbfff2854925 R12: 1ffff920005dcf00
R13: 1ffff920005dcf04 R14: ffffc90002ee7820 R15: dffffc0000000000
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline]
RIP: 0010:__local_bh_enable_ip+0x170/0x200 kernel/softirq.c:396
Code: 8c e8 e4 03 67 0a 65 66 8b 05 f4 10 a2 7e 66 85 c0 75 5d bf 01 00 00 00 e8 1d bd 0b 00 e8 c8 68 45 00 fb 65 8b 05 b8 10 a2 7e <85> c0 75 05 e8 37 82 a8 ff 48 c7 44 24 20 0e 36 e0 45 49 c7 04 1c
RSP: 0018:ffffc90002ee7980 EFLAGS: 00000282
RAX: 0000000080000000 RBX: 1ffff920005dcf34 RCX: ffffffff817b274a
RDX: dffffc0000000000 RSI: ffffffff8c0a98e0 RDI: ffffffff8c5fb0e0
RBP: ffffc90002ee7a30 R08: ffffffff942a4927 R09: 1ffffffff2854924
R10: dffffc0000000000 R11: fffffbfff2854925 R12: dffffc0000000000
R13: 1ffff920005dcf38 R14: ffffc90002ee79c0 R15: 0000000000000200
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 update_defense_level+0x8ec/0xcf0 net/netfilter/ipvs/ip_vs_ctl.c:210
 defense_work_handler+0x22/0xd0 net/netfilter/ipvs/ip_vs_ctl.c:235
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa68/0x1840 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 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
 </TASK>