kmalloc-96              2769KB       3408KB
kmem_cache_node          220KB        224KB
kmem_cache               195KB        195KB
Out of memory and no killable processes...
Kernel panic - not syncing: System is deadlocked on memory
CPU: 3 UID: 0 PID: 1192 Comm: kworker/u32:10 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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+0x16e6/0x1700 mm/oom_kill.c:1182
 __alloc_pages_may_oom mm/page_alloc.c:4092 [inline]
 __alloc_pages_slowpath mm/page_alloc.c:4897 [inline]
 __alloc_frozen_pages_noprof+0x1dbc/0x2430 mm/page_alloc.c:5223
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2486
 alloc_slab_page mm/slub.c:3075 [inline]
 allocate_slab mm/slub.c:3256 [inline]
 new_slab+0x2e1/0x430 mm/slub.c:3302
 ___slab_alloc+0xe18/0x1c90 mm/slub.c:4656
 __slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4779
 __slab_alloc_node mm/slub.c:4855 [inline]
 slab_alloc_node mm/slub.c:5251 [inline]
 __do_kmalloc_node mm/slub.c:5656 [inline]
 __kmalloc_node_track_caller_noprof+0x4d6/0x930 mm/slub.c:5764
 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:608
 __alloc_skb+0x186/0x410 net/core/skbuff.c:690
 alloc_skb include/linux/skbuff.h:1383 [inline]
 nlmsg_new include/net/netlink.h:1055 [inline]
 rtmsg_ifinfo_build_skb+0x81/0x280 net/core/rtnetlink.c:4407
 rtmsg_ifinfo_event net/core/rtnetlink.c:4449 [inline]
 rtmsg_ifinfo_event net/core/rtnetlink.c:4439 [inline]
 rtmsg_ifinfo+0x9f/0x1a0 net/core/rtnetlink.c:4458
 netif_close_many+0x2fc/0x630 net/core/dev.c:1784
 netif_close_many_and_unlock+0x24/0x270 net/core/dev.c:12281
 unregister_netdevice_many_notify+0x38f/0x2590 net/core/dev.c:12345
 unregister_netdevice_many net/core/dev.c:12444 [inline]
 default_device_exit_batch+0x995/0xc80 net/core/dev.c:13036
 ops_exit_list net/core/net_namespace.c:205 [inline]
 ops_undo_list+0x363/0xab0 net/core/net_namespace.c:252
 cleanup_net+0x41b/0x830 net/core/net_namespace.c:696
 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
 process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..