rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P12345/1:b..l
	(detected by 0, t=10502 jiffies, g=51017, q=47 ncpus=2)
task:syz-executor.2  state:R  running task     stack:28472 pid:12345 ppid:3588   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
 irqentry_exit+0x53/0x80 kernel/entry/common.c:433
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:sctp_v4_cmp_addr+0x66/0x1c0 net/sctp/protocol.c:302
Code: 42 0f b6 04 20 84 c0 0f 85 e1 00 00 00 41 0f b7 1e 0f b7 ed 89 ef 89 de e8 67 50 b9 f7 66 39 dd 0f 85 94 00 00 00 49 8d 5f 02 <48> 89 d8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 cd 00 00 00 0f b7
RSP: 0018:ffffc9000d6df948 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffff888023560a22 RCX: 0000000000040000
RDX: ffff888084a95940 RSI: 0000000000000002 RDI: 0000000000000002
RBP: 0000000000000002 R08: ffffffff89d14069 R09: ffffffff89d0fad6
R10: 0000000000000002 R11: ffff888084a95940 R12: dffffc0000000000
R13: ffff888023560a3d R14: ffffc9000d6dfa20 R15: ffff888023560a20
 sctp_bind_addr_state+0xcb/0x1a0 net/sctp/bind_addr.c:413
 sctp_copy_local_addr_list+0x2d3/0x4f0 net/sctp/protocol.c:162
 sctp_bind_addr_copy+0xa9/0x3b0 net/sctp/bind_addr.c:56
 sctp_connect_new_asoc+0x2e5/0x6a0 net/sctp/socket.c:1093
 __sctp_connect+0x657/0xe10 net/sctp/socket.c:1195
 __sctp_setsockopt_connectx net/sctp/socket.c:1334 [inline]
 sctp_getsockopt_connectx3+0x467/0x720 net/sctp/socket.c:1419
 sctp_getsockopt+0x3a0/0x7f0 net/sctp/socket.c:8117
 __sys_getsockopt+0x2b2/0x5d0 net/socket.c:2313
 __do_sys_getsockopt net/socket.c:2328 [inline]
 __se_sys_getsockopt net/socket.c:2325 [inline]
 __x64_sys_getsockopt+0xb1/0xc0 net/socket.c:2325
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5adc47cae9
RSP: 002b:00007f5add14e0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007f5adc59bf80 RCX: 00007f5adc47cae9
RDX: 000000000000006f RSI: 0000000000000084 RDI: 0000000000000004
RBP: 00007f5adc4c847a R08: 0000000020000280 R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f5adc59bf80 R15: 00007ffdeaf2a5f8
 </TASK>
rcu: rcu_preempt kthread starved for 9650 jiffies! g51017 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:26680 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x2c2/0x1010 kernel/rcu/tree.c:1661
 rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1860
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.63-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:113 [inline]
RIP: 0010:acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:572
Code: fc f6 f6 48 83 e3 08 0f 85 0b 01 00 00 4c 8d 74 24 20 e8 24 bb fd f6 0f 1f 44 00 00 e8 4a f8 f6 f6 0f 00 2d 93 5f b3 00 fb f4 <4c> 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 cb 4f 4e f7
RSP: 0018:ffffffff8ce07b20 EFLAGS: 000002d3
RAX: ffffffff8a9397a6 RBX: 0000000000000000 RCX: ffffffff8cebd800
RDX: 0000000000000000 RSI: ffffffff8aebe320 RDI: ffffffff8b3cefc0
RBP: ffffffff8ce07bb0 R08: ffffffff8a939788 R09: fffffbfff19d7b01
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff19c0f64
R13: ffff88814529a004 R14: ffffffff8ce07b40 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd0cfabff8 CR3: 0000000073de4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:709
 cpuidle_enter_state+0x516/0xf80 drivers/cpuidle/cpuidle.c:239
 cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:356
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:236 [inline]
 do_idle+0x3ce/0x680 kernel/sched/idle.c:303
 cpu_startup_entry+0x3d/0x60 kernel/sched/idle.c:401
 rest_init+0x2da/0x300 init/main.c:727
 arch_call_rest_init+0xa/0xa init/main.c:887
 start_kernel+0x496/0x53f init/main.c:1134
 secondary_startup_64_no_verify+0xcf/0xdb
 </TASK>