[ 3885]     0  3885     9301        0       7       2        0             0 syz-executor5
[ 3934]     0  3934     9301        0       7       2        0             0 syz-executor1
[ 3949]     0  3949     9301        0       7       2        0             0 syz-executor7
[ 3959]     0  3959     9301        0       7       2        0             0 syz-executor2
[ 3965]     0  3965     9301        0       7       2        0             0 syz-executor0
Kernel panic - not syncing: Out of memory and no killable processes...

CPU: 1 PID: 6 Comm: kworker/u4:0 Not tainted 4.9.112-g9e79039 #11
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
 ffff8801d9a46fe8
 ffffffff81eb3249 ffffffff83ca59e0 00000000ffffffff dffffc0000000000
 0000000000000001 1ffff1003b348e21 ffff8801d9a470a8 ffffffff81421a55
 0000000041b58ab3 ffffffff843bae78 ffffffff81421896Call Trace:
 [<ffffffff81eb3249>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb3249>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81421a55>] panic+0x1bf/0x3bc kernel/panic.c:179
 [<ffffffff815633bc>] out_of_memory.cold.24+0x1e/0x5d mm/oom_kill.c:1058
 [<ffffffff814538ad>] __alloc_pages_may_oom mm/page_alloc.c:3135 [inline]
 [<ffffffff814538ad>] __alloc_pages_slowpath+0x119d/0x1e50 mm/page_alloc.c:3751
 [<ffffffff814548b4>] __alloc_pages_nodemask+0x354/0x700 mm/page_alloc.c:3862
 [<ffffffff81534dc5>] __alloc_pages include/linux/gfp.h:433 [inline]
 [<ffffffff81534dc5>] __alloc_pages_node include/linux/gfp.h:446 [inline]
 [<ffffffff81534dc5>] alloc_slab_page mm/slub.c:1408 [inline]
 [<ffffffff81534dc5>] allocate_slab mm/slub.c:1557 [inline]
 [<ffffffff81534dc5>] new_slab+0x335/0x3d0 mm/slub.c:1635
 [<ffffffff81536a5a>] new_slab_objects mm/slub.c:2419 [inline]
 [<ffffffff81536a5a>] ___slab_alloc.constprop.79+0x2ba/0x5a0 mm/slub.c:2576
 [<ffffffff81536d90>] __slab_alloc.isra.72.constprop.78+0x50/0xa0 mm/slub.c:2618
 [<ffffffff81536f39>] slab_alloc_node mm/slub.c:2681 [inline]
 [<ffffffff81536f39>] slab_alloc mm/slub.c:2723 [inline]
 [<ffffffff81536f39>] kmem_cache_alloc+0x159/0x290 mm/slub.c:2728
 [<ffffffff83033236>] kmem_cache_alloc_node include/linux/slab.h:364 [inline]
 [<ffffffff83033236>] __alloc_skb+0xe6/0x600 net/core/skbuff.c:219
 [<ffffffff81ebcc97>] alloc_skb include/linux/skbuff.h:919 [inline]
 [<ffffffff81ebcc97>] kobject_uevent_env+0x587/0xb80 lib/kobject_uevent.c:300
 [<ffffffff81ebd2af>] kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:374
 [<ffffffff81eba074>] kobject_cleanup lib/kobject.c:630 [inline]
 [<ffffffff81eba074>] kobject_release+0x144/0x1b0 lib/kobject.c:672
 [<ffffffff81eb9c8d>] kref_sub include/linux/kref.h:73 [inline]
 [<ffffffff81eb9c8d>] kref_put include/linux/kref.h:98 [inline]
 [<ffffffff81eb9c8d>] kobject_put+0x6d/0xd0 lib/kobject.c:689
 [<ffffffff830e5e0e>] net_rx_queue_update_kobjects+0x29e/0x3d0 net/core/net-sysfs.c:956
 [<ffffffff830e626d>] remove_queue_kobjects net/core/net-sysfs.c:1395 [inline]
 [<ffffffff830e626d>] netdev_unregister_kobject+0x9d/0x110 net/core/net-sysfs.c:1530
 [<ffffffff8306f040>] rollback_registered_many+0x550/0x920 net/core/dev.c:6855
 [<ffffffff830726ab>] unregister_netdevice_many.part.106+0x1b/0x110 net/core/dev.c:7879
 [<ffffffff830727d9>] unregister_netdevice_many+0x39/0x50 net/core/dev.c:7878
 [<ffffffff83472aaf>] ip_tunnel_delete_net+0x2af/0x390 net/ipv4/ip_tunnel.c:1060
 [<ffffffff83494d69>] ipip_exit_net+0x129/0x1f0 net/ipv4/ipip.c:652
 [<ffffffff83059d50>] ops_exit_list.isra.6+0xb0/0x160 net/core/net_namespace.c:136
 [<ffffffff8305cc21>] cleanup_net+0x321/0x630 net/core/net_namespace.c:473
 [<ffffffff8118d191>] process_one_work+0x7e1/0x1500 kernel/workqueue.c:2092
 [<ffffffff8118df86>] worker_thread+0xd6/0x10a0 kernel/workqueue.c:2226
 [<ffffffff8119d0bd>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff839fa11c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..