kmalloc-96              1535KB       1564KB
kmem_cache_node          219KB        220KB
kmem_cache               179KB        179KB
Out of memory and no killable processes...
Kernel panic - not syncing: System is deadlocked on memory
CPU: 1 UID: 0 PID: 1149 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:4060 [inline]
 __alloc_pages_slowpath mm/page_alloc.c:4870 [inline]
 __alloc_frozen_pages_noprof+0x1dfa/0x2470 mm/page_alloc.c:5196
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:3030 [inline]
 allocate_slab mm/slub.c:3211 [inline]
 new_slab+0x268/0x360 mm/slub.c:3257
 ___slab_alloc+0xdc4/0x1ae0 mm/slub.c:4627
 __slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4746
 __slab_alloc_node mm/slub.c:4822 [inline]
 slab_alloc_node mm/slub.c:5233 [inline]
 kmem_cache_alloc_node_noprof+0x43c/0x770 mm/slub.c:5297
 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]
 inet_ifmcaddr_notify+0xc7/0x1c0 net/ipv4/igmp.c:1481
 __ip_mc_dec_group+0x442/0x5b0 net/ipv4/igmp.c:1778
 inetdev_event+0x3b2/0x18a0 net/ipv4/devinet.c:1641
 notifier_call_chain+0xb9/0x410 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]
 netif_close_many+0x319/0x630 net/core/dev.c:1784
 unregister_netdevice_many_notify+0x36f/0x24c0 net/core/dev.c:12216
 unregister_netdevice_many net/core/dev.c:12317 [inline]
 unregister_netdevice_queue+0x305/0x3f0 net/core/dev.c:12161
 unregister_netdevice include/linux/netdevice.h:3389 [inline]
 nsim_destroy+0x198/0x800 drivers/net/netdevsim/netdev.c:1171
 __nsim_dev_port_del+0x189/0x240 drivers/net/netdevsim/dev.c:1473
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1485 [inline]
 nsim_dev_reload_destroy+0x10a/0x4d0 drivers/net/netdevsim/dev.c:1707
 nsim_dev_reload_down+0x6e/0xd0 drivers/net/netdevsim/dev.c:983
 devlink_reload+0x19e/0x7c0 net/devlink/dev.c:461
 devlink_pernet_pre_exit+0x1a0/0x2b0 net/devlink/core.c:509
 ops_pre_exit_list net/core/net_namespace.c:161 [inline]
 ops_undo_list+0x184/0xab0 net/core/net_namespace.c:234
 cleanup_net+0x41b/0x8b0 net/core/net_namespace.c:695
 process_one_work+0x9cc/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+0x56a/0x730 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..