------------[ cut here ]------------ WARNING: CPU: 1 PID: 16288 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 net/ipv4/af_inet.c:167 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 16288 Comm: syz-executor4 Not tainted 4.9.124-g6a1b592 #30 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801db307cc0 ffffffff81eb95e9 ffffffff83c48ac0 00000000ffffffff 0000000000000000 0000000000000001 00000000000000a7 ffff8801db307d80 ffffffff81423eb5 0000000041b58ab3 ffffffff843bb8e8 ffffffff81423cf6 Call Trace: [ 235.605715] [] __dump_stack lib/dump_stack.c:15 [inline] [ 235.605715] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] panic+0x1bf/0x3bc kernel/panic.c:179 [] __warn.cold.9+0xc1/0x17f kernel/panic.c:542 [] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585 [] inet_sock_destruct+0x598/0x760 net/ipv4/af_inet.c:167 [] l2tp_tunnel_destruct+0x339/0x590 net/l2tp/l2tp_core.c:1329 [] __sk_destruct+0x55/0x590 net/core/sock.c:1428 [] __rcu_reclaim kernel/rcu/rcu.h:118 [inline] [] rcu_do_batch kernel/rcu/tree.c:2789 [inline] [] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline] [] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline] [] rcu_process_callbacks+0x8ae/0x12b0 kernel/rcu/tree.c:3037 [] __do_softirq+0x210/0x940 kernel/softirq.c:288 [] invoke_softirq kernel/softirq.c:368 [inline] [] irq_exit+0x114/0x150 kernel/softirq.c:409 [] exiting_irq arch/x86/include/asm/apic.h:669 [inline] [] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:962 [] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648 [ 235.728070] [] ? arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline] [ 235.728070] [] ? lock_release+0x6a5/0xb80 kernel/locking/lockdep.c:3778 [] rcu_lock_release include/linux/rcupdate.h:498 [inline] [] rcu_read_unlock include/linux/rcupdate.h:931 [inline] [] dput.part.29+0x168/0x7b0 fs/dcache.c:797 [] dput+0x1f/0x30 fs/dcache.c:789 [] path_put+0x31/0x70 fs/namei.c:516 [] free_fs_struct+0x22/0x60 fs/fs_struct.c:90 [] exit_fs+0xe9/0x120 fs/fs_struct.c:108 [] do_exit+0x9bb/0x27b0 kernel/exit.c:829 [] do_group_exit+0x111/0x340 kernel/exit.c:937 [] get_signal+0x4cf/0x1450 kernel/signal.c:2321 [] do_signal+0x87/0x19f0 arch/x86/kernel/signal.c:807 [] exit_to_usermode_loop+0xe1/0x120 arch/x86/entry/common.c:157 [] prepare_exit_to_usermode arch/x86/entry/common.c:191 [inline] [] syscall_return_slowpath arch/x86/entry/common.c:260 [inline] [] do_syscall_64+0x364/0x490 arch/x86/entry/common.c:287 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..