------------[ cut here ]------------
!rcu_read_lock_held()
WARNING: ./include/net/dst.h:326 at skb_dst_force include/net/dst.h:326 [inline], CPU#1: ksoftirqd/1/24
WARNING: ./include/net/dst.h:326 at xfrm_output_one net/xfrm/xfrm_output.c:549 [inline], CPU#1: ksoftirqd/1/24
WARNING: ./include/net/dst.h:326 at xfrm_output_resume+0x54c6/0x7200 net/xfrm/xfrm_output.c:597, CPU#1: ksoftirqd/1/24
Modules linked in:
CPU: 1 UID: 0 PID: 24 Comm: ksoftirqd/1 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
RIP: 0010:skb_dst_force include/net/dst.h:326 [inline]
RIP: 0010:xfrm_output_one net/xfrm/xfrm_output.c:549 [inline]
RIP: 0010:xfrm_output_resume+0x54c6/0x7200 net/xfrm/xfrm_output.c:597
Code: fe ff ff e8 5c 10 b3 fa 31 ff 41 89 c4 89 c6 e8 40 31 86 f7 45 84 e4 0f 85 1b f0 ff ff 31 db e9 20 f0 ff ff e8 1b 37 86 f7 90 <0f> 0b 90 e9 cd ef ff ff c6 85 c0 fe ff ff 00 31 db 49 8d 46 4d e9
RSP: 0018:ffffc900001e7868 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88807319f200 RCX: 0000000000000100
RDX: ffff8880206b0000 RSI: ffffffff8a8849e5 RDI: 0000000000000005
RBP: ffffc900001e79e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: ffff888055235980 R14: ffff8880364a2b40 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888122571000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9afe9556c8 CR3: 000000002a97e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 xfrm_output2 net/xfrm/xfrm_output.c:656 [inline]
 xfrm_output+0x33f/0x2040 net/xfrm/xfrm_output.c:837
 iptfs_output_queued net/xfrm/xfrm_iptfs.c:2325 [inline]
 iptfs_delay_timer+0x1ab7/0x3c20 net/xfrm/xfrm_iptfs.c:2362
 __run_hrtimer kernel/time/hrtimer.c:2079 [inline]
 __hrtimer_run_queues+0x448/0x9a0 kernel/time/hrtimer.c:2136
 hrtimer_run_softirq+0x1ca/0x360 kernel/time/hrtimer.c:2153
 handle_softirqs+0x216/0xa20 kernel/softirq.c:669
 run_ksoftirqd kernel/softirq.c:1133 [inline]
 run_ksoftirqd+0x38/0x60 kernel/softirq.c:1125
 smpboot_thread_fn+0x41f/0xb90 kernel/smpboot.c:162
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>