rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=10341, q=761192 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10491 (4294960737-4294950246), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10492 jiffies! g10341 f0x2 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:25816 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5315 [inline]
 __schedule+0x1843/0x4ae0 kernel/sched/core.c:6674
 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6853
 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6877
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock_irqrestore+0x130/0x140 kernel/locking/spinlock.c:194
 __try_to_del_timer_sync+0x2ad/0x340 kernel/time/timer.c:1513
 __timer_delete_sync+0x245/0x310 kernel/time/timer.c:1667
 timer_delete_sync kernel/time/timer.c:1722 [inline]
 del_timer_sync include/linux/timer.h:185 [inline]
 schedule_timeout+0x1c8/0x310 kernel/time/timer.c:2616
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/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:
CPU: 0 UID: 0 PID: 5660 Comm: syz.1.92 Not tainted 6.11.0-syzkaller-08833-gde5cb0dcb74c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:jhash2 include/linux/jhash.h:128 [inline]
RIP: 0010:hash_stack lib/stackdepot.c:514 [inline]
RIP: 0010:stack_depot_save_flags+0x70/0x830 lib/stackdepot.c:614
Code: 24 10 89 5c 24 04 43 8d 34 09 46 8d 34 cd 7b 71 f5 75 83 fe 04 72 75 44 89 f3 44 89 f0 4c 8b 44 24 08 4c 89 c2 03 02 03 5a 04 <44> 03 72 08 44 89 f7 c1 c7 04 44 29 f0 31 c7 41 01 de 29 fb 89 fd
RSP: 0018:ffffc90000006ca0 EFLAGS: 00000282
RAX: 000000006ec0759d RBX: 00000000f5207b3e RCX: 000000004b5e84bb
RDX: ffffc90000006d24 RSI: 0000000000000021 RDI: 000000002a840b0c
RBP: 00000000a05a522a R08: ffffc90000006d00 R09: 0000000000000015
R10: dffffc0000000000 R11: fffffbfff2036ac6 R12: ffffffff898a6440
R13: 1ffff92000000df8 R14: 000000008c68d154 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff637314880 CR3: 000000002dda6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 kasan_save_stack+0x4f/0x60 mm/kasan/common.c:48
 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541
 __call_rcu_common kernel/rcu/tree.c:3086 [inline]
 call_rcu+0x167/0xa70 kernel/rcu/tree.c:3190
 refdst_drop include/net/dst.h:263 [inline]
 skb_dst_drop include/net/dst.h:275 [inline]
 skb_release_head_state+0x73/0x250 net/core/skbuff.c:1174
 skb_release_all net/core/skbuff.c:1188 [inline]
 __kfree_skb net/core/skbuff.c:1204 [inline]
 consume_skb+0x60/0xf0 net/core/skbuff.c:1436
 nft_synproxy_eval_v4+0x3d2/0x610 net/netfilter/nft_synproxy.c:60
 nft_synproxy_do_eval+0x362/0xa60 net/netfilter/nft_synproxy.c:141
 expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]
 nft_do_chain+0x4ad/0x1da0 net/netfilter/nf_tables_core.c:288
 nft_do_chain_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626
 nf_hook include/linux/netfilter.h:269 [inline]
 NF_HOOK+0x29e/0x450 include/linux/netfilter.h:312
 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
 __netif_receive_skb_one_core net/core/dev.c:5662 [inline]
 __netif_receive_skb+0x2bf/0x650 net/core/dev.c:5775
 process_backlog+0x662/0x15b0 net/core/dev.c:6107
 __napi_poll+0xcb/0x490 net/core/dev.c:6771
 napi_poll net/core/dev.c:6840 [inline]
 net_rx_action+0x89b/0x1240 net/core/dev.c:6962
 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1037
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 8a e5 ac f5 48 89 df e8 02 29 ae f5 e8 9d 1c d9 f5 fb bf 01 00 00 00 <e8> e2 a7 9f f5 65 8b 05 03 7b 40 74 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc9000a4ff1d8 EFLAGS: 00000286
RAX: 071a04ee42f8df00 RBX: ffff888074ae03a8 RCX: ffffffff81708eca
RDX: dffffc0000000000 RSI: ffffffff8c0aca40 RDI: 0000000000000001
RBP: 1ffff1100e95c074 R08: ffffffff942257d7 R09: 1ffffffff2844afa
R10: dffffc0000000000 R11: fffffbfff2844afb R12: ffffc9000a4ff308
R13: ffffea00017958c0 R14: ffffea00017958c0 R15: ffff888074ae03a0
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 filemap_remove_folio+0x110/0x2e0 mm/filemap.c:266
 truncate_inode_folio+0x5d/0x70 mm/truncate.c:178
 shmem_undo_range+0x43c/0x1cf0 mm/shmem.c:1028
 shmem_truncate_range mm/shmem.c:1144 [inline]
 shmem_evict_inode+0x29b/0xa80 mm/shmem.c:1272
 evict+0x4e8/0x9b0 fs/inode.c:731
 __dentry_kill+0x20d/0x630 fs/dcache.c:615
 dput+0x19f/0x2b0 fs/dcache.c:857
 __fput+0x5d2/0x880 fs/file_table.c:439
 task_work_run+0x24f/0x310 kernel/task_work.c:228
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xa2f/0x28e0 kernel/exit.c:939
 do_group_exit+0x207/0x2c0 kernel/exit.c:1088
 get_signal+0x176f/0x1810 kernel/signal.c:2936
 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:328 [inline]
 irqentry_exit_to_user_mode+0x79/0x280 kernel/entry/common.c:231
 exc_page_fault+0x590/0x8c0 arch/x86/mm/fault.c:1542
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 002b:00000000200004f0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 0000000000000058 RCX: 00007fcf06b7def9
RDX: 00007fcf07a5cf20 RSI: 0000000000000058 RDI: 00007fcf07a5cf20
RBP: 00007fcf06bf0b76 R08: 0000000000000000 R09: 0000000000000058
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fcf06d35f80 R15: 00007fff2289e548
 </TASK>