rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (2 GPs behind) idle=c8b4/1/0x4000000000000000 softirq=8875/8876 fqs=2
rcu: 	(detected by 1, t=10502 jiffies, g=11421, q=303 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7 Comm: kworker/0:0 Not tainted 6.7.0-rc2-syzkaller-00265-gd2da77f431ac #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: ipv6_addrconf addrconf_dad_work
RIP: 0010:rb_erase_cached include/linux/rbtree.h:124 [inline]
RIP: 0010:timerqueue_del+0xcc/0x140 lib/timerqueue.c:57
Code: ff df 48 89 ea 48 89 1b 48 c1 ea 03 80 3c 02 00 75 6f 48 8b 45 00 48 85 c0 0f 95 c0 48 83 c4 08 5b 5d 41 5c c3 e8 14 d2 15 f7 <48> 89 df e8 dc a0 ff ff 4c 89 e1 48 ba 00 00 00 00 00 fc ff df 48
RSP: 0018:ffffc90000007de0 EFLAGS: 00000046
RAX: 0000000000010202 RBX: ffff88807dccd340 RCX: ffffffff8a70adc0
RDX: ffff88801a6601c0 RSI: ffffffff8a70ae4c RDI: 0000000000000006
RBP: ffff8880b982ba90 R08: 0000000000000006 R09: 0000000000000001
R10: ffff88807dccd340 R11: 0000000000000006 R12: ffff8880b982ba98
R13: 0000000000000000 R14: ffff8880b982b940 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000600 CR3: 0000000021f2b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __remove_hrtimer+0x99/0x290 kernel/time/hrtimer.c:1119
 __run_hrtimer kernel/time/hrtimer.c:1668 [inline]
 __hrtimer_run_queues+0x55b/0xc20 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
 __sysvec_apic_timer_interrupt+0x105/0x400 arch/x86/kernel/apic/apic.c:1082
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:fib6_walk_continue+0x18a/0x8c0 net/ipv6/ip6_fib.c:2080
Code: 00 4c 89 7d 18 43 0f b6 44 25 00 84 c0 74 08 3c 03 0f 8e 1c 06 00 00 c7 45 28 00 00 00 00 e8 ad b7 4f f8 48 8b 04 24 80 38 00 <0f> 84 3b ff ff ff 48 8b 7c 24 20 e8 b6 9a a5 f8 e9 2c ff ff ff 41
RSP: 0018:ffffc900002df8e8 EFLAGS: 00000246
RAX: fffff5200005bf3a RBX: ffff88807d285900 RCX: ffffffff8936c839
RDX: ffff88801a6601c0 RSI: ffffffff8936c8b3 RDI: ffff88807d285910
RBP: ffffc900002df9b8 R08: 0000000000000005 R09: 0000000000000004
R10: 0000000000000002 R11: 0000000000000005 R12: dffffc0000000000
R13: 1ffff9200005bf3c R14: 0000000000000002 R15: ffff88807d285880
 fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2170
 fib6_clean_tree+0xd7/0x110 net/ipv6/ip6_fib.c:2250
 __fib6_clean_all+0x100/0x2d0 net/ipv6/ip6_fib.c:2266
 rt_genid_bump_ipv6 include/net/net_namespace.h:523 [inline]
 addrconf_dad_completed+0x87d/0x1030 net/ipv6/addrconf.c:4317
 addrconf_dad_work+0x7f6/0x14b0 net/ipv6/addrconf.c:4211
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: rcu_preempt kthread starved for 10496 jiffies! g11421 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:28336 pid:16    tgid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xedb/0x5af0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6778
 schedule_timeout+0x137/0x290 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1631
 rcu_gp_kthread+0x24b/0x380 kernel/rcu/tree.c:1830
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 22 Comm: kworker/1:0 Not tainted 6.7.0-rc2-syzkaller-00265-gd2da77f431ac #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: events bpf_prog_free_deferred
RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline]
RIP: 0010:smp_call_function_many_cond+0x4e4/0x1550 kernel/smp.c:855
Code: 0b 00 85 ed 74 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 f4 4c 89 f5 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 3e b8 0b 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 24 0e 00 00 8b 43 08 31
RSP: 0018:ffffc900003df858 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b98414c0 RCX: ffffffff817ac848
RDX: ffff88801ae54140 RSI: ffffffff817ac822 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000005 R12: ffffed1017308299
R13: 0000000000000001 R14: ffff8880b98414c8 R15: ffff8880b993d900
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdc1263b98 CR3: 000000007d616000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1023
 on_each_cpu include/linux/smp.h:71 [inline]
 flush_tlb_kernel_range+0x82/0xb0 arch/x86/mm/tlb.c:1079
 __purge_vmap_area_lazy+0x8b9/0x2170 mm/vmalloc.c:1770
 _vm_unmap_aliases+0x693/0x9b0 mm/vmalloc.c:2306
 vm_reset_perms mm/vmalloc.c:2753 [inline]
 vfree+0x533/0x7a0 mm/vmalloc.c:2832
 bpf_prog_unlock_free include/linux/filter.h:924 [inline]
 bpf_jit_free include/linux/filter.h:1210 [inline]
 bpf_prog_free_deferred+0x534/0x720 kernel/bpf/core.c:2740
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>