executing program syzkaller login: [ 17.862962] SELinux: unrecognized netlink message: protocol=6 nlmsg_type=65535 sclass=netlink_xfrm_socket pig=3009 comm=syzkaller181565 [ 17.871330] kasan: CONFIG_KASAN_INLINE enabled [ 17.871768] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 17.872484] general protection fault: 0000 [#1] SMP KASAN [ 17.872855] Dumping ftrace buffer: [ 17.873128] (ftrace buffer empty) [ 17.873372] Modules linked in: [ 17.873584] CPU: 1 PID: 796 Comm: kworker/1:1 Not tainted 4.13.0-rc4-next-20170811 #2 [ 17.874105] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 17.874653] Workqueue: events netlink_sock_destruct_work [ 17.875013] task: ffff88003db72180 task.stack: ffff88003db78000 [ 17.875417] RIP: 0010:__list_del_entry_valid+0x7e/0x150 [ 17.875773] RSP: 0018:ffff88003db7f0b8 EFLAGS: 00010246 [ 17.876212] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 17.876884] RDX: 0000000000000000 RSI: ffff880039b7ae60 RDI: ffff880039b7ae68 [ 17.877518] RBP: ffff88003db7f0d0 R08: ffffffff842157b2 R09: 0000000000000000 [ 17.878142] R10: ffff88003db7ef98 R11: ffffffff86041750 R12: 0000000000000000 [ 17.878724] R13: ffff88003db7f198 R14: ffffffff86041738 R15: ffff880039b7ae68 [ 17.879226] FS: 0000000000000000(0000) GS:ffff88003ed00000(0000) knlGS:0000000000000000 [ 17.879797] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 17.880205] CR2: 00000000206bc000 CR3: 000000006d2f5000 CR4: 00000000000006e0 [ 17.880710] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 17.881219] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 17.881723] Call Trace: [ 17.881923] ? _raw_spin_lock_bh+0x39/0x40 [ 17.882241] xfrm_policy_walk_done+0xfa/0x310 [ 17.882614] ? xfrm_policy_alloc+0x510/0x510 [ 17.882965] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 17.883408] ? wait_for_completion+0x730/0x730 [ 17.883800] ? lock_acquire+0x1d5/0x580 [ 17.884141] ? rht_deferred_worker+0xe7b/0x1cd0 [ 17.884568] ? lock_downgrade+0x990/0x990 [ 17.885311] ? copy_sec_ctx+0x290/0x290 [ 17.885656] xfrm_dump_policy_done+0x73/0xa0 [ 17.886037] netlink_sock_destruct+0xfa/0x3c0 [ 17.886422] ? __netlink_create+0x270/0x270 [ 17.886809] ? rht_deferred_worker+0xd49/0x1cd0 [ 17.887122] ? mutex_unlock+0xd/0x10 [ 17.887425] ? rht_deferred_worker+0x2bf/0x1cd0 [ 17.887826] ? __netlink_create+0x270/0x270 [ 17.888201] __sk_destruct+0xfd/0x910 [ 17.888529] ? sock_rfree+0x160/0x160 [ 17.888828] ? rhashtable_rehash_alloc+0x330/0x330 [ 17.889161] ? lock_acquire+0x1d5/0x580 [ 17.889442] ? __mutex_unlock_slowpath+0xe9/0xac0 [ 17.889779] ? set_next_entity+0x2ca/0xd60 [ 17.890072] ? wait_for_completion+0x730/0x730 [ 17.890392] ? lock_acquire+0x1d5/0x580 [ 17.890683] ? lock_acquire+0x1d5/0x580 [ 17.890963] ? process_one_work+0xb32/0x1bc0 [ 17.891272] ? refcount_sub_and_test+0x115/0x1b0 [ 17.891602] ? refcount_inc+0x50/0x50 [ 17.891864] ? finish_task_switch+0x1d3/0x740 [ 17.892173] sk_destruct+0x47/0x80 [ 17.892445] __sk_free+0x57/0x230 [ 17.892713] sk_free+0x2a/0x40 [ 17.892940] netlink_sock_destruct_work+0x19/0x20 [ 17.893333] process_one_work+0xbf3/0x1bc0 [ 17.893661] ? pwq_dec_nr_in_flight+0x450/0x450 [ 17.894017] ? preempt_notifier_dec+0x20/0x20 [ 17.894388] ? sched_clock_cpu+0x1b/0x170 [ 17.894745] ? __schedule+0x8f0/0x2070 [ 17.895082] ? check_noncircular+0x20/0x20 [ 17.895474] ? check_noncircular+0x20/0x20 [ 17.895834] ? check_noncircular+0x20/0x20 [ 17.896202] ? lock_acquire+0x1d5/0x580 [ 17.896577] ? lock_acquire+0x1d5/0x580 [ 17.896915] ? worker_thread+0x4a3/0x1860 [ 17.897298] ? lock_downgrade+0x990/0x990 [ 17.897707] ? lock_release+0xa40/0xa40 [ 17.898045] ? do_raw_spin_trylock+0x190/0x190 [ 17.898445] ? pr_cont_work+0x130/0x130 [ 17.898846] worker_thread+0x223/0x1860 [ 17.899195] ? process_one_work+0x1bc0/0x1bc0 [ 17.899582] ? _raw_spin_unlock_irq+0x27/0x70 [ 17.899965] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 17.900435] ? trace_hardirqs_on+0xd/0x10 [ 17.900844] ? _raw_spin_unlock_irq+0x27/0x70 [ 17.901228] ? finish_task_switch+0x1d3/0x740 [ 17.901605] ? finish_task_switch+0x1aa/0x740 [ 17.901959] ? preempt_notifier_dec+0x20/0x20 [ 17.902278] ? __schedule+0x8f0/0x2070 [ 17.902619] ? __x2apic_send_IPI_dest.constprop.7+0x5b/0x80 [ 17.903152] ? try_to_wake_up+0xf9/0x1600 [ 17.903531] ? migrate_swap_stop+0x970/0x970 [ 17.903937] ? find_held_lock+0x35/0x1d0 [ 17.904300] ? complete+0x62/0x80 [ 17.904666] ? __schedule+0x2070/0x2070 [ 17.905050] ? __lockdep_init_map+0xe4/0x650 [ 17.905431] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 17.905907] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 17.906379] ? trace_hardirqs_on+0xd/0x10 [ 17.906981] ? __kthread_parkme+0x173/0x240 [ 17.907398] kthread+0x35e/0x430 [ 17.907716] ? process_one_work+0x1bc0/0x1bc0 [ 17.908125] ? kthread_create_on_node+0x100/0x100 [ 17.908621] ret_from_fork+0x2a/0x40 [ 17.908956] Code: 00 00 00 00 ad de 49 39 c4 74 66 48 b8 00 02 00 00 00 00 ad de 48 89 da 48 39 c3 74 65 48 c1 ea 03 48 b8 00 00 00 00 00 fc ff df <80> 3c 02 00 75 7b 48 8b 13 48 39 f2 75 57 49 8d 7c 24 08 48 b8 [ 17.910759] RIP: __list_del_entry_valid+0x7e/0x150 RSP: ffff88003db7f0b8 [ 17.911365] ---[ end trace 43ade81dff933644 ]--- [ 17.911772] Kernel panic - not syncing: Fatal exception in interrupt [ 17.912429] Dumping ftrace buffer: [ 17.912732] (ftrace buffer empty) [ 17.913048] Kernel Offset: disabled [ 17.913360] Rebooting in 86400 seconds..