rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P681/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=393173, q=1677 ncpus=2)
task:syz-executor    state:R  running task     stack:22328 pid:681   tgid:681   ppid:1      task_flags:0x40054c flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x730
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_acquire+0x221/0x350
Code: ff ff ff e8 e1 84 06 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 cb 5f 97 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 98 67 92
RSP: 0018:ffffc90007e3ef78 EFLAGS: 00000286
RAX: 96581e0222b80300 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 000000002ad94000 RSI: ffffffff8e21c1b2 RDI: ffffffff8c28b5e0
RBP: ffffffff8176e256 R08: ffffffff8176e256 R09: ffffffff8e95cda0
R10: ffffc90007e3f0d8 R11: ffffffff81b0d910 R12: 0000000000000002
R13: ffffffff8e95cda0 R14: 0000000000000000 R15: 0000000000000246
 unwind_next_frame+0xc3/0x2550
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 save_stack+0x122/0x230
 __reset_page_owner+0x71/0x1f0
 free_unref_folios+0xcde/0x1420
 folios_put_refs+0xa3d/0xb80
 free_pages_and_swap_cache+0x41d/0x490
 tlb_flush_mmu+0x6b4/0xa10
 tlb_finish_mmu+0xf9/0x230
 exit_mmap+0x498/0x9e0
 __mmput+0x118/0x430
 exit_mm+0x18e/0x250
 do_exit+0x6a2/0x22c0
 do_group_exit+0x21b/0x2d0
 get_signal+0x1284/0x1330
 arch_do_signal_or_restart+0xbc/0x830
 exit_to_user_mode_loop+0x86/0x480
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe92db5d60e
RSP: 002b:00007ffe376cf628 EFLAGS: 00000246 ORIG_RAX: 00000000000000e6
RAX: 0000000000000000 RBX: 00005555821c8500 RCX: 00007fe92db5d60e
RDX: 00007ffe376cf680 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe376cf6ec R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000001388
R13: 00000000000927c0 R14: 000000000029dded R15: 00007ffe376cf740
 </TASK>
rcu: rcu_preempt kthread starved for 259 jiffies! g393173 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:27640 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_timeout+0x158/0x2c0
 rcu_gp_fqs_loop+0x312/0x11d0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 1846 Comm: kworker/u8:8 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: krds_cp_wq#10/5 rds_connect_worker
RIP: 0010:unwind_next_frame+0x92/0x2550
Code: 8b 7e 38 4d 89 f5 49 c1 ed 03 41 0f b6 44 2d 00 84 c0 0f 85 c6 1b 00 00 41 8b 06 85 c0 0f 84 4e 02 00 00 89 84 24 8c 00 00 00 <4c> 89 bc 24 90 00 00 00 e8 01 9a 34 00 4c 8d 3d 00 00 00 00 48 c7
RSP: 0018:ffffc90000a086d8 EFLAGS: 00000202
RAX: 0000000000000002 RBX: ffffffff8187d07a RCX: 0000000080000100
RDX: dffffc0000000000 RSI: ffffffff8187d07a RDI: ffffc90000a087a8
RBP: dffffc0000000000 R08: ffffc90000a08870 R09: 0000000000000008
R10: ffffc90000a087f8 R11: ffffffff81b0d910 R12: ffffc90000a087e0
R13: 1ffff920001410f5 R14: ffffc90000a087a8 R15: ffffc90000a08f50
FS:  0000000000000000(0000) GS:ffff8882a9290000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3691cff080 CR3: 0000000113e10000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x384/0x690
 __alloc_skb+0x27d/0x7d0
 bcm_can_tx+0x207/0x8e0
 bcm_tx_timeout_handler+0x1c2/0x520
 __hrtimer_run_queues+0x3c0/0xa20
 hrtimer_run_softirq+0x17a/0x240
 handle_softirqs+0x22a/0x840
 do_softirq+0x76/0xd0
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x130
 __inet6_bind+0x30c/0xf60
 kernel_bind+0x13e/0x1c0
 rds_tcp_conn_path_connect+0x53e/0x930
 rds_connect_worker+0x1d8/0x290
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
IPVS: wrr: UDP 224.0.0.2:0 - no destination available
IPVS: wrr: UDP 224.0.0.2:0 - no destination available
IPVS: wrr: UDP 224.0.0.2:0 - no destination available
IPVS: wrr: UDP 224.0.0.2:0 - no destination available
IPVS: wrr: UDP 224.0.0.2:0 - no destination available
IPVS: wrr: UDP 224.0.0.2:0 - no destination available
IPVS: wrr: UDP 224.0.0.2:0 - no destination available
IPVS: wrr: UDP 224.0.0.2:0 - no destination available
IPVS: wrr: UDP 224.0.0.2:0 - no destination available
