kmalloc-96              1356KB       1544KB
kmem_cache_node          219KB        224KB
kmem_cache               187KB        187KB
Out of memory and no killable processes...
Kernel panic - not syncing: System is deadlocked on memory
CPU: 2 UID: 0 PID: 1146 Comm: kworker/u32:8 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x3d/0x1f0 lib/dump_stack.c:120
 vpanic+0x640/0x6f0 kernel/panic.c:489
 panic+0xca/0xd0 kernel/panic.c:626
 out_of_memory+0x16e4/0x1700 mm/oom_kill.c:1181
 __alloc_pages_may_oom mm/page_alloc.c:4055 [inline]
 __alloc_pages_slowpath mm/page_alloc.c:4865 [inline]
 __alloc_frozen_pages_noprof+0x1dfa/0x2470 mm/page_alloc.c:5191
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:3059 [inline]
 allocate_slab mm/slub.c:3240 [inline]
 new_slab+0x268/0x360 mm/slub.c:3286
 ___slab_alloc+0xd79/0x1a50 mm/slub.c:4655
 __slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4778
 __slab_alloc_node mm/slub.c:4854 [inline]
 slab_alloc_node mm/slub.c:5276 [inline]
 kmem_cache_alloc_node_noprof+0x43c/0x770 mm/slub.c:5340
 kmalloc_reserve+0x18b/0x2c0 net/core/skbuff.c:579
 __alloc_skb+0x166/0x380 net/core/skbuff.c:670
 alloc_skb include/linux/skbuff.h:1383 [inline]
 nlmsg_new include/net/netlink.h:1055 [inline]
 inet6_ifmcaddr_notify+0xd6/0x1d0 net/ipv6/mcast.c:909
 __ipv6_dev_mc_dec+0x297/0x340 net/ipv6/mcast.c:1002
 ipv6_mc_destroy_dev+0x2cd/0x690 net/ipv6/mcast.c:2844
 addrconf_ifdown.isra.0+0x1400/0x1aa0 net/ipv6/addrconf.c:3996
 addrconf_notify+0x220/0x19e0 net/ipv6/addrconf.c:3776
 notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2229
 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
 call_netdevice_notifiers net/core/dev.c:2281 [inline]
 unregister_netdevice_many_notify+0xf5c/0x25c0 net/core/dev.c:12284
 ops_exit_rtnl_list net/core/net_namespace.c:187 [inline]
 ops_undo_list+0x8fc/0xab0 net/core/net_namespace.c:248
 cleanup_net+0x41b/0x8b0 net/core/net_namespace.c:695
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
 process_scheduled_works kernel/workqueue.c:3346 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..