------------[ cut here ]------------ WARNING: CPU: 1 PID: 2253 at lib/debugobjects.c:260 debug_print_object+0x181/0x210 lib/debugobjects.c:260() ODEBUG: activate active (active state 1) object type: rcu_head hint: (null) Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 2253 Comm: syz-executor.0 Not tainted 4.4.174+ #4 0000000000000000 17b9571e87229455 ffff8801db707298 ffffffff81aad1a1 ffff8801db7073e8 ffffffff82835ee0 ffffffff8292c440 0000000000000104 ffffffff81b0b3d1 ffff8801db707378 ffffffff813a48c2 0000000041b58ab3 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [] panic+0x1b9/0x37b kernel/panic.c:112 [] warn_slowpath_common kernel/panic.c:455 [inline] [] warn_slowpath_common.cold+0x20/0x20 kernel/panic.c:435 [] warn_slowpath_fmt+0xbf/0x100 kernel/panic.c:471 [] debug_print_object+0x181/0x210 lib/debugobjects.c:260 [] debug_object_activate+0x2f0/0x470 lib/debugobjects.c:418 [] debug_rcu_head_queue kernel/rcu/rcu.h:75 [inline] [] __call_rcu.constprop.0+0x35/0x930 kernel/rcu/tree.c:3059 [] call_rcu+0x12/0x20 kernel/rcu/tree_plugin.h:662 [] xfrm_policy_destroy+0x77/0x90 net/xfrm/xfrm_policy.c:323 [] xfrm_pol_put include/net/xfrm.h:797 [inline] [] xfrm_pols_put include/net/xfrm.h:804 [inline] [] __xfrm_policy_check+0x137a/0x1640 net/xfrm/xfrm_policy.c:2579 [] __xfrm_policy_check2 include/net/xfrm.h:1067 [inline] [] xfrm_policy_check include/net/xfrm.h:1076 [inline] [] xfrm4_policy_check include/net/xfrm.h:1081 [inline] [] udp_queue_rcv_skb+0x8cb/0x14e0 net/ipv4/udp.c:1520 [] __udp4_lib_rcv+0x4e3/0x21f0 net/ipv4/udp.c:1830 [] udp_rcv+0x22/0x30 net/ipv4/udp.c:2043 [] ip_local_deliver_finish+0x3c0/0xa70 net/ipv4/ip_input.c:216 [] NF_HOOK_THRESH include/linux/netfilter.h:226 [inline] [] NF_HOOK include/linux/netfilter.h:249 [inline] [] ip_local_deliver+0x1af/0x390 net/ipv4/ip_input.c:257 [] dst_input include/net/dst.h:504 [inline] [] ip_rcv_finish+0x768/0x1220 net/ipv4/ip_input.c:365 [] NF_HOOK_THRESH include/linux/netfilter.h:226 [inline] [] NF_HOOK include/linux/netfilter.h:249 [inline] [] ip_rcv+0x8fa/0xe70 net/ipv4/ip_input.c:456 [] __netif_receive_skb_core+0x1300/0x2950 net/core/dev.c:4041 [] __netif_receive_skb+0x58/0x1c0 net/core/dev.c:4076 [] process_backlog+0x200/0x630 net/core/dev.c:4673 [] napi_poll net/core/dev.c:4911 [inline] [] net_rx_action+0x367/0xd30 net/core/dev.c:4976 [] __do_softirq+0x226/0xa3f kernel/softirq.c:273 [] do_softirq_own_stack+0x1c/0x30 arch/x86/entry/entry_64.S:956 [] do_softirq.part.0+0x54/0x60 kernel/softirq.c:317 [] do_softirq+0x18/0x20 kernel/softirq.c:305 [] netif_rx_ni+0xeb/0x3b0 net/core/dev.c:3675 [] tun_get_user+0xdbf/0x2640 drivers/net/tun.c:1264 [] tun_chr_write_iter+0xda/0x190 drivers/net/tun.c:1283 [] do_iter_readv_writev+0x141/0x1e0 fs/read_write.c:666 [] do_readv_writev+0x387/0x6e0 fs/read_write.c:810 [] vfs_writev+0x7d/0xb0 fs/read_write.c:849 [] SYSC_writev fs/read_write.c:882 [inline] [] SyS_writev+0xdc/0x260 fs/read_write.c:874 [] entry_SYSCALL_64_fastpath+0x1e/0x9a Kernel Offset: disabled Rebooting in 86400 seconds..