kmalloc-96              1722KB       1944KB
kmem_cache_node          216KB        220KB
kmem_cache               179KB        218KB
Out of memory and no killable processes...
Kernel panic - not syncing: System is deadlocked on memory
CPU: 3 UID: 0 PID: 12 Comm: kworker/u32:0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 vpanic+0x2dc/0x6f8 kernel/panic.c:661
 panic+0xd1/0xe0 kernel/panic.c:787
 out_of_memory.cold+0xa4/0x172 mm/oom_kill.c:1159
 __alloc_pages_may_oom mm/page_alloc.c:4105 [inline]
 __alloc_pages_slowpath mm/page_alloc.c:5035 [inline]
 __alloc_frozen_pages_noprof+0x27d0/0x3280 mm/page_alloc.c:5457
 alloc_slab_page mm/slub.c:3384 [inline]
 allocate_slab mm/slub.c:3507 [inline]
 new_slab+0x1ff/0x6d0 mm/slub.c:3550
 refill_objects+0xe3/0x410 mm/slub.c:7539
 refill_sheaf mm/slub.c:2917 [inline]
 __pcs_replace_empty_main+0x35e/0x650 mm/slub.c:4811
 alloc_from_pcs mm/slub.c:4887 [inline]
 slab_alloc_node mm/slub.c:5021 [inline]
 __do_kmalloc_node mm/slub.c:5530 [inline]
 __kmalloc_node_track_caller_noprof+0x6a3/0x870 mm/slub.c:5662
 kmalloc_reserve+0xe8/0x350 net/core/skbuff.c:638
 __alloc_skb+0x185/0x710 net/core/skbuff.c:716
 alloc_skb include/linux/skbuff.h:1390 [inline]
 nlmsg_new include/net/netlink.h:1055 [inline]
 nl80211_notify_iface+0x32/0x1c0 net/wireless/nl80211.c:21405
 _cfg80211_unregister_wdev+0x11b/0xb10 net/wireless/core.c:1496
 ieee80211_remove_interfaces+0x34e/0x6e0 net/mac80211/iface.c:2528
 ieee80211_unregister_hw+0x55/0x370 net/mac80211/main.c:1725
 mac80211_hwsim_del_radio+0x2f6/0x470 drivers/net/wireless/virtual/mac80211_hwsim_main.c:6302
 hwsim_exit_net+0x81b/0x1400 drivers/net/wireless/virtual/mac80211_hwsim_main.c:7365
 ops_exit_list net/core/net_namespace.c:200 [inline]
 ops_undo_list+0x2ee/0xab0 net/core/net_namespace.c:253
 cleanup_net+0x499/0x920 net/core/net_namespace.c:706
 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3495
 process_scheduled_works kernel/workqueue.c:3578 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3659
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x730/0xd60 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..