rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10495 ticks this GP) idle=d40c/1/0x4000000000000000 softirq=93897/93932 fqs=4736
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1079227        130            0
rcu: 	cputime:    31938      20540           87   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=88025 q=2541 ncpus=2)
CPU: 1 UID: 0 PID: 24976 Comm: syz.0.6517 Not tainted 6.17.0-rc1-syzkaller-00022-g07866544e410 #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:skb_header_pointer+0x1/0x130
Code: f2 f7 4c 89 f6 e9 bb fe ff ff e8 8a 32 48 01 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 <41> 57 41 56 41 55 41 54 53 50 48 89 cb 41 89 d7 89 74 24 04 49 89
RSP: 0018:ffffc900001e00b0 EFLAGS: 00000206
RAX: 0000000000000028 RBX: ffffc900001e0530 RCX: ffffc900001e0150
RDX: 0000000000000008 RSI: 0000000000000028 RDI: ffff888120d9d680
RBP: ffffc900001e01d0 R08: ffffc900001e0127 R09: 0000000000000000
R10: ffffc900001e0100 R11: fffff5200003c025 R12: 1ffff9200003c01c
R13: ffffc900001e0150 R14: 0000000000000000 R15: ffff888120d9d680
FS:  00007f2d14b656c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555670855c8 CR3: 000000010792c000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 ip6_multipath_l3_keys+0x2ce/0x4b0
 rt6_multipath_hash+0x34f/0x1860
 ip6_route_input+0x85b/0xa50
 ip6_rcv_finish+0x141/0x2e0
 NF_HOOK+0x30c/0x3a0
 __netif_receive_skb+0xd3/0x380
 process_backlog+0x60e/0x14f0
 __napi_poll+0xc7/0x360
 net_rx_action+0x707/0xe30
 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:___free_pages+0x67/0x200
Code: 00 00 48 89 df be 08 00 00 00 e8 74 eb 0c 00 43 80 3c 27 00 74 08 48 89 df e8 f5 e8 0c 00 41 b5 01 48 f7 03 40 00 00 00 74 0f <0f> 1f 44 00 00 48 89 d8 48 39 d8 41 0f 95 c5 4c 8d 7b 34 4c 89 ff
RSP: 0018:ffffc900084576a8 EFLAGS: 00000202
RAX: 057ff00000000001 RBX: ffffea0004250880 RCX: ffffffff821634fc
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea0004250880
RBP: 0000000000000000 R08: ffffea0004250887 R09: 1ffffd400084a110
R10: dffffc0000000000 R11: fffff9400084a111 R12: dffffc0000000000
R13: 1ffff9200108ae01 R14: 0000000000000001 R15: 1ffffd400084a110
 pagetable_dtor_free+0x2d2/0x3b0
 __mmdrop+0xb5/0x580
 finish_task_switch+0x3ee/0x950
 __schedule+0x17a0/0x4cc0
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 _raw_spin_unlock+0x3f/0x50
 fasync_insert_entry+0x1df/0x270
 fasync_helper+0x52/0xb0
 perf_fasync+0xc3/0x110
 do_vfs_ioctl+0x1064/0x1430
 __se_sys_ioctl+0x82/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2d13d8ebe9
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:00007f2d14b65038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2d13fb5fa0 RCX: 00007f2d13d8ebe9
RDX: 0000200000000c00 RSI: 0000000000005452 RDI: 0000000000000007
RBP: 00007f2d13e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2d13fb6038 R14: 00007f2d13fb5fa0 R15: 00007ffe680f6568
 </TASK>
