======================================
| [ 3929.000845][T19894] dropreason: entered promiscuous mode
| [ 3937.594911][T19945] c0: entered promiscuous mode
| [ 3945.234957][T19992] s0: entered promiscuous mode
| [ 4157.067861][T20154] perf: page allocation failure: order:6, mode:0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), nodemask=(null),cpuset=/,mems_allowed=0
[ 4157.068960][T20154] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 4157.069303][T20154] Call Trace:
[ 4157.069431][T20154]  <TASK>
[4157.069516][T20154] dump_stack_lvl (lib/dump_stack.c:123) 
[4157.069905][T20154] warn_alloc (mm/page_alloc.c:3532) 
[4157.070036][T20154] ? __pfx_warn_alloc (mm/page_alloc.c:3511) 
[4157.070210][T20154] ? __alloc_pages_direct_compact (mm/page_alloc.c:3706) 
[4157.070414][T20154] ? __pfx___alloc_pages_direct_compact (mm/page_alloc.c:3654) 
[4157.070619][T20154] __alloc_pages_slowpath.constprop.0 (mm/page_alloc.c:4465) 
[4157.070819][T20154] ? get_page_from_freelist (mm/page_alloc.c:3215 mm/page_alloc.c:3410) 
[4157.070973][T20154] ? __pfx___alloc_pages_slowpath.constprop.0 (mm/page_alloc.c:4187) 
[4157.071175][T20154] __alloc_pages_noprof (mm/page_alloc.c:4746) 
[4157.071331][T20154] ? __pfx___alloc_pages_noprof (mm/page_alloc.c:4699) 
[4157.071496][T20154] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[4157.071658][T20154] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3794 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[4157.071830][T20154] ? v9fs_alloc_rdir_buf.isra.0 (fs/9p/vfs_dir.c:73) 
[4157.071989][T20154] ___kmalloc_large_node (./include/linux/gfp.h:269 ./include/linux/gfp.h:296 mm/slub.c:4209) 
[4157.072153][T20154] ? v9fs_alloc_rdir_buf.isra.0 (fs/9p/vfs_dir.c:73) 
[4157.072305][T20154] __kmalloc_large_node_noprof (./arch/x86/include/asm/bitops.h:417 ./include/asm-generic/getorder.h:46 mm/slub.c:4238) 
[4157.072463][T20154] __kmalloc_noprof (./arch/x86/include/asm/bitops.h:417 ./include/asm-generic/getorder.h:46 mm/slub.c:4254 mm/slub.c:4276) 
[4157.072623][T20154] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[4157.072790][T20154] v9fs_alloc_rdir_buf.isra.0 (fs/9p/vfs_dir.c:73) 
[4157.072947][T20154] v9fs_dir_readdir_dotl (fs/9p/vfs_dir.c:170) 
[4157.073104][T20154] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[4157.073267][T20154] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[4157.073434][T20154] ? __pfx_v9fs_dir_readdir_dotl (fs/9p/vfs_dir.c:158) 
[4157.073628][T20154] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[4157.073787][T20154] ? iterate_dir (fs/readdir.c:101) 
[4157.073959][T20154] ? rwsem_read_trylock (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2629 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3224 kernel/locking/rwsem.c:176 kernel/locking/rwsem.c:181 kernel/locking/rwsem.c:256 kernel/locking/rwsem.c:248) 
[4157.074118][T20154] ? __pfx_rwsem_read_trylock (kernel/locking/rwsem.c:249) 
[4157.074280][T20154] ? iterate_dir (fs/readdir.c:101) 
[4157.074439][T20154] ? lock_acquire (kernel/locking/lockdep.c:5798) 
[4157.074594][T20154] ? iterate_dir (fs/readdir.c:101) 
[4157.074756][T20154] ? down_read_killable (kernel/locking/rwsem.c:1247 kernel/locking/rwsem.c:1271 kernel/locking/rwsem.c:1549) 
[4157.074914][T20154] ? iterate_dir (fs/readdir.c:101) 
[4157.075070][T20154] ? __pfx_down_read_killable (kernel/locking/rwsem.c:1545) 
[4157.075230][T20154] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[4157.075390][T20154] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[4157.075553][T20154] iterate_dir (fs/readdir.c:108) 
[4157.075709][T20154] ovl_iterate (fs/overlayfs/readdir.c:775) 
[4157.075871][T20154] ? wrap_directory_iterator (fs/readdir.c:54) 
[4157.076030][T20154] ? __pfx_ovl_iterate (fs/overlayfs/readdir.c:751) 
[4157.076195][T20154] ? __pfx_ovl_iterate (fs/overlayfs/readdir.c:751) 
[4157.076353][T20154] wrap_directory_iterator (fs/readdir.c:65) 
[4157.076510][T20154] iterate_dir (fs/readdir.c:108) 
[4157.076667][T20154] __x64_sys_getdents64 (fs/readdir.c:404 fs/readdir.c:389 fs/readdir.c:389) 
[4157.076845][T20154] ? __pfx___x64_sys_getdents64 (fs/readdir.c:389) 
[4157.076998][T20154] ? do_user_addr_fault (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/linux/mm.h:729 arch/x86/mm/fault.c:1340) 
[4157.077158][T20154] ? __pfx_filldir64 (fs/readdir.c:347) 
[4157.077316][T20154] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:729 arch/x86/mm/fault.c:1340) 
[4157.077481][T20154] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[4157.077638][T20154] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4157.077832][T20154] RIP: 0033:0x7f6f71d4e5b7
[ 4157.077999][T20154] Code: 80 f8 ff 4c 89 e0 5b 5d 41 5c c3 0f 1f 84 00 00 00 00 00 f3 0f 1e fa b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 19 48 0e 00 f7 d8 64 89 02 48
All code
========
   0:	80 f8 ff             	cmp    $0xff,%al
   3:	4c 89 e0             	mov    %r12,%rax
   6:	5b                   	pop    %rbx
   7:	5d                   	pop    %rbp
   8:	41 5c                	pop    %r12
   a:	c3                   	ret
   b:	0f 1f 84 00 00 00 00 	nopl   0x0(%rax,%rax,1)
  12:	00 
  13:	f3 0f 1e fa          	endbr64
  17:	b8 ff ff ff 7f       	mov    $0x7fffffff,%eax
  1c:	48 39 c2             	cmp    %rax,%rdx
  1f:	48 0f 47 d0          	cmova  %rax,%rdx
  23:	b8 d9 00 00 00       	mov    $0xd9,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 01                	ja     0x33
  32:	c3                   	ret
  33:	48 8b 15 19 48 0e 00 	mov    0xe4819(%rip),%rdx        # 0xe4853
  3a:	f7 d8                	neg    %eax
  3c:	64 89 02             	mov    %eax,%fs:(%rdx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 01                	ja     0x9
   8:	c3                   	ret
   9:	48 8b 15 19 48 0e 00 	mov    0xe4819(%rip),%rdx        # 0xe4829
  10:	f7 d8                	neg    %eax
  12:	64 89 02             	mov    %eax,%fs:(%rdx)
  15:	48                   	rex.W
[ 4157.078558][T20154] RSP: 002b:00007ffc31563fe8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
[ 4157.078797][T20154] RAX: ffffffffffffffda RBX: 00007f6f71734040 RCX: 00007f6f71d4e5b7
[ 4157.079028][T20154] RDX: 0000000000020000 RSI: 00007f6f71734040 RDI: 0000000000000007
[ 4157.079265][T20154] RBP: 00007f6f71734014 R08: 00007f6f71734010 R09: 0000000000000000
[ 4157.079508][T20154] R10: 0000000000000022 R11: 0000000000000293 R12: ffffffffffffff38


Finger prints:
warn_alloc:__alloc_pages_noprof:___kmalloc_large_node:__kmalloc_large_node_noprof:__kmalloc_noprof