rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (5112 ticks this GP) idle=b364/1/0x4000000000000000 softirq=10691/10696 fqs=0
	(t=10501 jiffies g=10401 q=1031 ncpus=2)
rcu: rcu_preempt kthread starved for 10502 jiffies! g10401 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:26712 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x143f/0x4570 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3626 Comm: kworker/0:3 Not tainted 6.1.103-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: events nsim_fib_event_work
RIP: 0010:get_stack_info_noinstr+0x0/0x130 arch/x86/kernel/dumpstack_64.c:172
Code: 99 8b f6 e8 62 3e af f6 5c 48 c7 c7 20 48 06 8b e8 15 44 00 00 65 c6 05 ad 7e 5d 75 00 eb 9b cc cc cc cc cc cc cc cc cc cc cc <55> 41 57 41 56 41 54 53 49 89 d4 48 89 f3 48 89 fd e8 1a 01 00 00
RSP: 0018:ffffc90003b1f280 EFLAGS: 00000286
RAX: 1ffff92000763e6b RBX: ffffc90003b1f320 RCX: ffffc90003b1f340
RDX: ffffc90003b1f320 RSI: ffff888028e59dc0 RDI: ffffc90003b1f2c0
RBP: ffff888028e59dc0 R08: dffffc0000000000 R09: ffffc90003b1f320
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90003b1f340
R13: ffffc90003b1f348 R14: ffffc90003b1f340 R15: 1ffff92000763e69
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055cc318158d8 CR3: 000000007987c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 get_stack_info+0x37/0xf0 arch/x86/kernel/dumpstack_64.c:199
 __unwind_start+0x437/0x720 arch/x86/kernel/unwind_orc.c:686
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0xdb/0x140 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1724 [inline]
 slab_free_freelist_hook mm/slub.c:1750 [inline]
 slab_free mm/slub.c:3661 [inline]
 __kmem_cache_free+0x25c/0x3c0 mm/slub.c:3674
 nsim_fib_event drivers/net/netdevsim/fib.c:891 [inline]
 nsim_fib_event_work+0x11c1/0x4120 drivers/net/netdevsim/fib.c:1492
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 process_scheduled_works kernel/workqueue.c:2355 [inline]
 worker_thread+0xd04/0x1200 kernel/workqueue.c:2441
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
CPU: 1 PID: 4142 Comm: syz.0.43 Not tainted 6.1.103-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:fib6_node_lookup_1+0x36c/0x8a0 net/ipv6/ip6_fib.c:1586
Code: 52 7b f8 48 8b 2b e8 03 57 3e 01 89 c3 31 ff 89 c6 e8 d8 d9 23 f8 85 db 74 1f e8 7f 5a 0b f8 89 c3 31 ff 89 c6 e8 c4 d9 23 f8 <85> db 0f 84 30 02 00 00 e8 57 d6 23 f8 eb 05 e8 50 d6 23 f8 48 85
RSP: 0018:ffffc900001e00d8 EFLAGS: 00000246
RAX: 0000000000000102 RBX: 0000000000000001 RCX: 0000000000000102
RDX: ffff888018729dc0 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff88805891c800 R08: ffffffff8966ca3c R09: ffffc900001e0180
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900001e0188
R13: ffffc900001e0180 R14: dffffc0000000000 R15: ffff888076854880
FS:  00007fbfe840d6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d16d26fa8 CR3: 0000000058e23000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 fib6_node_lookup+0x146/0x240 net/ipv6/ip6_fib.c:1642
 fib6_table_lookup+0xc2/0xbb0 net/ipv6/route.c:2185
 ip6_pol_route+0x207/0x14e0 net/ipv6/route.c:2225
 pol_lookup_func include/net/ip6_fib.h:579 [inline]
 fib6_rule_lookup+0x265/0x620 net/ipv6/fib6_rules.c:116
 ip6_route_input_lookup net/ipv6/route.c:2294 [inline]
 ip6_route_input+0x830/0xd90 net/ipv6/route.c:2590
 ip6_rcv_finish+0x140/0x230 net/ipv6/ip6_input.c:77
 NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302
 __netif_receive_skb_one_core net/core/dev.c:5528 [inline]
 __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5642
 process_backlog+0x381/0x760 net/core/dev.c:5970
 __napi_poll+0xc7/0x470 net/core/dev.c:6537
 napi_poll net/core/dev.c:6604 [inline]
 net_rx_action+0x70f/0xeb0 net/core/dev.c:6718
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
 __do_softirq kernel/softirq.c:605 [inline]
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:85 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x7b/0x290 mm/kasan/generic.c:189
Code: 00 00 00 00 fc ff df 4f 8d 34 1a 4c 89 f5 4c 29 cd 48 83 fd 10 7f 26 48 85 ed 0f 84 3a 01 00 00 49 f7 d2 49 01 da 41 80 39 00 <0f> 85 c4 01 00 00 49 ff c1 49 ff c2 75 ee e9 1d 01 00 00 45 89 cf
RSP: 0018:ffffc900037aed38 EFLAGS: 00000246
RAX: ffffffff8a9fa701 RBX: 1ffff920006f5dc0 RCX: ffffffff8a9fa77e
RDX: 0000000000000001 RSI: 0000000000000018 RDI: ffffc900037aee00
RBP: 0000000000000003 R08: dffffc0000000000 R09: fffff520006f5dc2
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff1060ffffff09
R13: dffffc0000000000 R14: fffff520006f5dc3 R15: ffffc900037af25a
 memset+0x1f/0x40 mm/kasan/shadow.c:44
 number+0x9e/0xf80 lib/vsprintf.c:458
 vsnprintf+0x1361/0x1c70 lib/vsprintf.c:2871
 sprintf+0xd6/0x120 lib/vsprintf.c:3009
 __sprint_symbol+0x289/0x3c0 kernel/kallsyms.c:534
 symbol_string+0x18d/0x3b0 lib/vsprintf.c:1000
 pointer+0x7a2/0x1000 lib/vsprintf.c:2403
 vsnprintf+0xdf8/0x1c70 lib/vsprintf.c:2809
 snprintf+0xd6/0x120 lib/vsprintf.c:2940
 bpf_bprintf_prepare+0xb6e/0x1450 kernel/bpf/helpers.c:894
 ____bpf_snprintf kernel/bpf/helpers.c:1050 [inline]
 bpf_snprintf+0x15b/0x260 kernel/bpf/helpers.c:1034
 bpf_prog_f2f741945f01d4c6+0x50/0x54
 bpf_dispatcher_nop_func include/linux/bpf.h:989 [inline]
 __bpf_prog_run include/linux/filter.h:596 [inline]
 bpf_prog_run include/linux/filter.h:610 [inline]
 bpf_prog_run_pin_on_cpu include/linux/filter.h:627 [inline]
 bpf_flow_dissect+0x32a/0x3d0 net/core/flow_dissector.c:913
 bpf_prog_test_run_flow_dissector+0x465/0x7e0 net/bpf/test_run.c:1487
 bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3685
 __sys_bpf+0x3eb/0x6c0 kernel/bpf/syscall.c:5038
 __do_sys_bpf kernel/bpf/syscall.c:5124 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5122 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5122
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fbfe75779f9
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:00007fbfe840d048 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fbfe7705f80 RCX: 00007fbfe75779f9
RDX: 0000000000000050 RSI: 0000000020000640 RDI: 000000000000000a
RBP: 00007fbfe75e58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fbfe7705f80 R15: 00007ffe82fdd038
 </TASK>