rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P11423/1:b..l
	(detected by 1, t=10502 jiffies, g=61505, q=86)
task:syz-executor.4  state:R  running task     stack:26328 pid:11423 ppid: 10576 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6780
 irqentry_exit+0x53/0x80 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:ipv6_addr_label+0x0/0x1a0 net/ipv6/addrlabel.c:142
Code: ff ff e8 f3 ed 21 01 0f 1f 00 e8 2b ad 84 f8 e8 06 df 3f ff e8 01 94 fe ff e9 3c e0 3f ff cc cc cc cc cc cc cc cc cc cc cc cc <55> 41 57 41 56 41 54 53 41 89 ce 89 d5 49 89 f7 49 89 fc e8 f8 ac
RSP: 0018:ffffc9000300f0f8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 00000000000e0001 RSI: ffffc9000300f568 RDI: ffff888057d19a40
RBP: ffffc9000300f250 R08: ffffffff88f884f0 R09: ffffffff89174344
R10: 0000000000000002 R11: ffff88801fce8000 R12: dffffc0000000000
R13: ffffc9000300f568 R14: 00000000000e0001 R15: ffffc9000300f1c0
 ipv6_dev_get_saddr+0x195/0xb50 net/ipv6/addrconf.c:1782
 ip6_route_get_saddr include/net/ip6_route.h:145 [inline]
 ip6_dst_lookup_tail+0xc87/0x11a0 net/ipv6/ip6_output.c:1099
 ip6_dst_lookup_flow+0xb5/0x170 net/ipv6/ip6_output.c:1224
 sctp_v6_get_dst+0x91c/0x1d60 net/sctp/ipv6.c:327
 sctp_transport_route+0x10c/0x2b0 net/sctp/transport.c:461
 sctp_assoc_add_peer+0x60a/0x15a0 net/sctp/associola.c:664
 sctp_connect_new_asoc+0x30f/0x6a0 net/sctp/socket.c:1096
 sctp_sendmsg_new_asoc net/sctp/socket.c:1690 [inline]
 sctp_sendmsg+0x1cd9/0x3370 net/sctp/socket.c:2004
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2431
 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2485
 __sys_sendmsg net/socket.c:2514 [inline]
 __do_sys_sendmsg net/socket.c:2523 [inline]
 __se_sys_sendmsg+0x19a/0x260 net/socket.c:2521
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f3bf88cfea9
RSP: 002b:00007f3bf6e420c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f3bf89fdf80 RCX: 00007f3bf88cfea9
RDX: 0000000000000000 RSI: 00000000200017c0 RDI: 0000000000000003
RBP: 00007f3bf891c4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f3bf89fdf80 R15: 00007ffca69683a8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g61505 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=29287
rcu: rcu_preempt kthread starved for 10502 jiffies! g61505 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27000 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1f0 kernel/sched/core.c:6459
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
 </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: 2963 Comm: udevd Not tainted 5.15.156-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__lock_acquire+0xd22/0x1ff0 kernel/locking/lockdep.c:4985
Code: df 48 63 c5 48 8b 6c 24 18 48 0f a3 05 c7 a1 5c 0e 0f 83 4c 08 00 00 48 81 c5 e0 0a 00 00 49 89 ee 49 c1 ee 03 41 80 3c 3e 00 <74> 12 48 89 ef e8 84 62 67 00 48 bf 00 00 00 00 00 fc ff df 31 c0
RSP: 0018:ffffc900000079e0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88807dc464a8 RCX: ffffffff8162bedf
RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000
RBP: ffff88807dc46420 R08: dffffc0000000000 R09: fffffbfff1f7ec19
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000003
R13: ffff88807dc46428 R14: 1ffff1100fb88c84 R15: ffff88807dc464c8
FS:  00007fb3c55e8c80(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000040 CR3: 00000000235f7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
 debug_object_activate+0x63/0x4e0 lib/debugobjects.c:693
 debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline]
 debug_activate kernel/time/hrtimer.c:475 [inline]
 enqueue_hrtimer+0x30/0x390 kernel/time/hrtimer.c:1084
 __run_hrtimer kernel/time/hrtimer.c:1703 [inline]
 __hrtimer_run_queues+0x6b6/0xcf0 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_acquire+0x252/0x4f0 kernel/locking/lockdep.c:5627
Code: 2b 00 74 08 4c 89 f7 e8 ac 73 67 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc9000cac7ae0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92001958f68 RCX: ffffffff81636522
RDX: dffffc0000000000 RSI: ffffffff8a8b3c20 RDI: ffffffff8ad8f380
RBP: ffffc9000cac7c30 R08: dffffc0000000000 R09: fffffbfff1f7ec1b
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92001958f64
R13: dffffc0000000000 R14: ffffc9000cac7b40 R15: 0000000000000246
 fs_reclaim_acquire+0xa7/0x120 mm/page_alloc.c:4564
 might_alloc include/linux/sched/mm.h:206 [inline]
 slab_pre_alloc_hook+0x22/0xc0 mm/slab.h:492
 slab_alloc_node mm/slub.c:3134 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc+0x3f/0x280 mm/slub.c:3233
 getname_flags+0xb8/0x4e0 fs/namei.c:138
 do_sys_openat2+0xd2/0x500 fs/open.c:1247
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1280
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb3c5717477
Code: 10 00 00 00 44 8b 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 44 89 c2 4c 89 ce bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 82 69 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffce87f1118 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055f09ea0c2c0 RCX: 00007fb3c5717477
RDX: 0000000000090800 RSI: 000055f09ea1e0f0 RDI: 00000000ffffff9c
RBP: 000055f09ea94620 R08: 0000000000090800 R09: 000055f09ea1e0f0
R10: 0000000000000000 R11: 0000000000000287 R12: 000055f09ea1e0f0
R13: 00000000000000ff R14: 000055f09d3311c4 R15: 0000000000000000
 </TASK>