rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=ee24/1/0x4000000000000000 softirq=43824/43824 fqs=965
rcu: 	(t=10500 jiffies g=38625 q=1947 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 8546 jiffies! g38625 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=16502
rcu: rcu_preempt kthread starved for 8547 jiffies! g38625 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:27048 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </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 UID: 0 PID: 5678 Comm: kworker/u8:2 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: bat_events batadv_nc_worker
RIP: 0010:kasan_check_range+0x57/0x2c0
Code: 80 ff ff eb 11 cc cc cc f3 0f 1e fa 49 b9 00 00 00 00 00 00 00 ff f3 0f 1e fa 4c 39 cf 0f 82 58 02 00 00 49 89 ff 49 c1 ef 03 <49> ba 00 00 00 00 00 fc ff df 4f 8d 1c 17 49 ff c8 4d 89 c1 49 c1
RSP: 0018:ffffc90000007888 EFLAGS: 00000a06
RAX: 0000000000000001 RBX: ffff88802b5198c0 RCX: ffffffff8b7d9e5c
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88802b5198c0
RBP: ffffc900000079b8 R08: ffff88802b5198c4 R09: ffff800000000000
R10: dffffc0000000000 R11: ffffed10056a3319 R12: 1ffff92000000f20
R13: 0000000000000001 R14: ffffc90000007920 R15: 1ffff110056a3318
FS:  0000000000000000(0000) GS:ffff8880b8612000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff35d06f866 CR3: 000000010ff0c000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 native_queued_spin_lock_slowpath+0xbc/0x8e0
 queued_spin_lock_slowpath+0x43/0x50
 do_raw_spin_lock+0x21f/0x290
 __xfrm_state_delete+0xba/0xca0
 xfrm_timer_handler+0x18f/0xa00
 __hrtimer_run_queues+0x52c/0xc60
 hrtimer_run_softirq+0x187/0x2b0
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:batadv_nc_worker+0x179/0x610
Code: 05 22 17 45 04 01 48 c7 c7 20 4f b7 8c be 4b 03 00 00 48 c7 c2 60 4f b7 8c e8 73 1b 55 f6 48 89 e8 48 c1 e8 03 42 80 3c 20 00 <74> 08 48 89 ef e8 8d 5c db f6 48 8b 6d 00 48 85 ed 0f 94 c0 48 81
RSP: 0018:ffffc90002eafa20 EFLAGS: 00000246
RAX: 1ffff1102363e2c0 RBX: 0000000000000001 RCX: ffff88801f608000
RDX: 0000000000000000 RSI: ffffffff8be34460 RDI: ffffffff8be34420
RBP: ffff88811b1f1600 R08: 0000000000000000 R09: ffffffff8b487e62
R10: dffffc0000000000 R11: ffffffff8b487d90 R12: dffffc0000000000
R13: ffffffff8b487e62 R14: ffff888039434d80 R15: 00000000000002c0
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
CPU: 1 UID: 0 PID: 12003 Comm: syz.6.1798 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70
Code: 89 fb e8 23 00 00 00 48 8b 3d 94 73 fe 0b 48 89 de 5b e9 c3 48 59 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 e0 a0 92 65 8b 15 b8 1e
RSP: 0018:ffffc900065af0d8 EFLAGS: 00000297
RAX: 1ffff1100511e005 RBX: 0000000006000000 RCX: 0000000000080000
RDX: ffffc90020ce9000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc900065af230 R08: 0000000000000000 R09: ffffffff8a22ec30
R10: dffffc0000000000 R11: fffff52000cb5e0c R12: dffffc0000000000
R13: ffff8880288f0000 R14: 0000000001000000 R15: ffffc900065af6a0
FS:  00007fe1e4ebe6c0(0000) GS:ffff8881a3c12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000440 CR3: 000000011e508000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 xfrm_alloc_spi+0x534/0xf30
 xfrm_alloc_userspi+0x70b/0xc90
 xfrm_user_rcv_msg+0x7a3/0xab0
 netlink_rcv_skb+0x208/0x470
 xfrm_netlink_rcv+0x79/0x90
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe1e3f8ec29
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:00007fe1e4ebe038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fe1e41d5fa0 RCX: 00007fe1e3f8ec29
RDX: 0000000000000000 RSI: 0000200000000440 RDI: 0000000000000003
RBP: 00007fe1e4011e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe1e41d6038 R14: 00007fe1e41d5fa0 R15: 00007ffe44c0c568
 </TASK>
