Kernel panic - not syncing: System is deadlocked on memory
CPU: 3 UID: 0 PID: 5882 Comm: kworker/u32:3 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+0x552/0x970 kernel/panic.c:651
 panic+0xd1/0xe0 kernel/panic.c:788
 out_of_memory.cold+0xa2/0x170 mm/oom_kill.c:1166
 __alloc_pages_may_oom mm/page_alloc.c:4116 [inline]
 __alloc_pages_slowpath mm/page_alloc.c:4967 [inline]
 __alloc_frozen_pages_noprof+0x24c2/0x2dc0 mm/page_alloc.c:5317
 alloc_pages_mpol+0x1fb/0x540 mm/mempolicy.c:2490
 alloc_pages_noprof+0x1a/0x160 mm/mempolicy.c:2581
 get_free_pages_noprof+0x10/0xb0 mm/page_alloc.c:5363
 selinux_genfs_get_sid security/selinux/hooks.c:1339 [inline]
 inode_doinit_with_dentry+0x788/0x1320 security/selinux/hooks.c:1563
 selinux_d_instantiate+0x26/0x40 security/selinux/hooks.c:6678
 security_d_instantiate+0x14c/0x1b0 security/security.c:3704
 d_make_persistent+0x64/0x180 fs/dcache.c:2970
 debugfs_create_dir+0x19b/0x440 fs/debugfs/inode.c:591
 nsim_fib_debugfs_init drivers/net/netdevsim/fib.c:1522 [inline]
 nsim_fib_create+0x6fb/0xc20 drivers/net/netdevsim/fib.c:1600
 nsim_dev_reload_create drivers/net/netdevsim/dev.c:1604 [inline]
 nsim_dev_reload_up+0x279/0x670 drivers/net/netdevsim/dev.c:1058
 devlink_reload+0x2f2/0x7a0 net/devlink/dev.c:475
 devlink_pernet_pre_exit+0x247/0x370 net/devlink/core.c:560
 ops_pre_exit_list net/core/net_namespace.c:161 [inline]
 ops_undo_list+0x187/0xab0 net/core/net_namespace.c:234
 cleanup_net+0x499/0x920 net/core/net_namespace.c:702
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 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..