======================================
| [ 4210.029057][    C2] ==================================================================
| [ 4210.029314][ C2] BUG: KASAN: null-ptr-deref in sock_def_write_space_wfree (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 net/core/sock.c:3397) 
| [ 4210.029541][    C2] Read of size 8 at addr 0000000000000008 by task cmsg_sender/8049
| [ 4210.029754][    C2]
[ 4210.030059][    C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 4210.030381][    C2] Call Trace:
[ 4210.030493][    C2]  <IRQ>
[ 4210.030577][ C2] dump_stack_lvl (lib/dump_stack.c:117) 
[ 4210.030725][ C2] kasan_report (mm/kasan/report.c:603) 
[ 4210.030834][ C2] ? sock_def_write_space_wfree (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 net/core/sock.c:3397) 
[ 4210.031014][ C2] kasan_check_range (mm/kasan/generic.c:183 mm/kasan/generic.c:189) 
[ 4210.031156][ C2] sock_def_write_space_wfree (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 net/core/sock.c:3397) 
[ 4210.031297][ C2] sock_wfree (./include/linux/rcupdate.h:810 net/core/sock.c:2471) 
[ 4210.031405][ C2] skb_release_head_state (net/core/skbuff.c:1162 (discriminator 3)) 
[ 4210.031547][ C2] consume_skb (net/core/skbuff.c:1174 net/core/skbuff.c:1189 net/core/skbuff.c:1405 net/core/skbuff.c:1399) 
[ 4210.031658][ C2] dummy_xmit (drivers/net/dummy.c:66) 
[ 4210.031765][ C2] ? trace_net_dev_start_xmit (./include/trace/events/net.h:14 (discriminator 52)) 
[ 4210.031907][ C2] dev_hard_start_xmit (./include/linux/netdevice.h:4875 ./include/linux/netdevice.h:4889 net/core/dev.c:3563 net/core/dev.c:3579) 
[ 4210.032052][ C2] sch_direct_xmit (net/sched/sch_generic.c:343) 
[ 4210.032197][ C2] ? __pfx_sch_direct_xmit (net/sched/sch_generic.c:318) 
[ 4210.032341][ C2] __qdisc_run (net/sched/sch_generic.c:416) 
[ 4210.032482][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 4210.032625][ C2] ? __pfx___qdisc_run (net/sched/sch_generic.c:412) 
[ 4210.032771][ C2] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:115 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 4210.032913][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 4210.033055][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 4210.033198][ C2] ? net_tx_action (./include/linux/spinlock.h:352 net/core/dev.c:5250) 
[ 4210.033352][ C2] net_tx_action (./include/net/sch_generic.h:217 ./include/net/pkt_sched.h:128 ./include/net/pkt_sched.h:124 net/core/dev.c:5266) 
[ 4210.033494][ C2] __do_softirq (kernel/softirq.c:554) 
[ 4210.033639][ C2] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 4210.033748][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[ 4210.033892][    C2]  </IRQ>
[ 4210.033972][    C2]  <TASK>
[ 4210.034043][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 4210.034219][ C2] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 4210.034409][ C2] Code: 10 e8 b1 00 79 fd 48 89 ef e8 e9 70 79 fd 81 e3 00 02 00 00 75 1d 9c 58 f6 c4 02 75 29 48 85 db 74 01 fb 65 ff 0d 15 5c 8d 53 <74> 0e 5b 5d c3 cc cc cc cc e8 0f d1 9c fd eb dc 0f 1f 44 00 00 5b
All code
========
   0:	10 e8                	adc    %ch,%al
   2:	b1 00                	mov    $0x0,%cl
   4:	79 fd                	jns    0x3
   6:	48 89 ef             	mov    %rbp,%rdi
   9:	e8 e9 70 79 fd       	call   0xfffffffffd7970f7
   e:	81 e3 00 02 00 00    	and    $0x200,%ebx
  14:	75 1d                	jne    0x33
  16:	9c                   	pushf
  17:	58                   	pop    %rax
  18:	f6 c4 02             	test   $0x2,%ah
  1b:	75 29                	jne    0x46
  1d:	48 85 db             	test   %rbx,%rbx
  20:	74 01                	je     0x23
  22:	fb                   	sti
  23:	65 ff 0d 15 5c 8d 53 	decl   %gs:0x538d5c15(%rip)        # 0x538d5c3f
  2a:*	74 0e                	je     0x3a		<-- trapping instruction
  2c:	5b                   	pop    %rbx
  2d:	5d                   	pop    %rbp
  2e:	c3                   	ret
  2f:	cc                   	int3
  30:	cc                   	int3
  31:	cc                   	int3
  32:	cc                   	int3
  33:	e8 0f d1 9c fd       	call   0xfffffffffd9cd147
  38:	eb dc                	jmp    0x16
  3a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3f:	5b                   	pop    %rbx

Code starting with the faulting instruction
===========================================
   0:	74 0e                	je     0x10
   2:	5b                   	pop    %rbx
   3:	5d                   	pop    %rbp
   4:	c3                   	ret
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	cc                   	int3
   9:	e8 0f d1 9c fd       	call   0xfffffffffd9cd11d
   e:	eb dc                	jmp    0xffffffffffffffec
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	5b                   	pop    %rbx
[ 4210.034905][    C2] RSP: 0018:ffffc9000058fa80 EFLAGS: 00000282
[ 4210.035090][    C2] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff5f458b4
[ 4210.035299][    C2] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffac766dc1
[ 4210.035509][    C2] RBP: ffff8880010bfa80 R08: 0000000000000001 R09: fffffbfff5f432aa
[ 4210.035720][    C2] R10: ffffffffafa19557 R11: 0000000000000008 R12: ffff8880010bfa80
[ 4210.035934][    C2] R13: ffffea0000330000 R14: ffff88800196ac40 R15: ffff88800cc015b0
[ 4210.036153][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 4210.036331][ C2] get_partial_node.part.0 (mm/slub.c:2623) 
[ 4210.036476][ C2] ___slab_alloc (mm/slub.c:2583 mm/slub.c:2701 mm/slub.c:3505) 
[ 4210.036619][ C2] ? kmem_cache_alloc (./include/linux/sched/mm.h:315 mm/slub.c:3746 mm/slub.c:3827 mm/slub.c:3852) 
[ 4210.036761][ C2] ? vm_area_alloc (kernel/fork.c:441 kernel/fork.c:472) 
[ 4210.036913][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 4210.037058][ C2] ? vm_area_alloc (kernel/fork.c:441 kernel/fork.c:472) 
[ 4210.037197][ C2] ? kmem_cache_alloc (mm/slub.c:3610 mm/slub.c:3663 mm/slub.c:3835 mm/slub.c:3852) 
[ 4210.037343][ C2] kmem_cache_alloc (mm/slub.c:3610 mm/slub.c:3663 mm/slub.c:3835 mm/slub.c:3852) 
[ 4210.037485][ C2] vm_area_alloc (kernel/fork.c:441 kernel/fork.c:472) 
[ 4210.037624][ C2] mmap_region (mm/mmap.c:2807) 
[ 4210.037770][ C2] ? __pfx_arch_get_unmapped_area_topdown (arch/x86/kernel/sys_x86_64.c:157) 
[ 4210.037946][ C2] ? __pfx_mmap_region (mm/mmap.c:2718) 
[ 4210.038092][ C2] ? get_unmapped_area (mm/mmap.c:1854) 
[ 4210.038233][ C2] do_mmap (mm/mmap.c:1385) 
[ 4210.038339][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 4210.038482][ C2] ? __fget_files (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 fs/file.c:1037) 
[ 4210.038627][ C2] vm_mmap_pgoff (mm/util.c:573) 
[ 4210.038774][ C2] ? __pfx_vm_mmap_pgoff (mm/util.c:563) 
[ 4210.038916][ C2] ? __fget_files (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 fs/file.c:1037) 
[ 4210.039057][ C2] ? __fget_files (fs/file.c:1040) 
[ 4210.039199][ C2] ksys_mmap_pgoff (mm/mmap.c:1431) 
[ 4210.039345][ C2] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 4210.039489][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[ 4210.039663][    C2] RIP: 0033:0x7fca18a2c287
[ 4210.039812][ C2] Code: c3 66 90 48 89 2b 48 c7 43 08 00 04 00 00 5b 5d 41 5c c3 f3 0f 1e fa 41 89 ca 41 f7 c1 ff 0f 00 00 75 10 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 19 c3 c7 05 46 ef 00 00 16 00 00 00 48 c7 c0
All code
========
   0:	c3                   	ret
   1:	66 90                	xchg   %ax,%ax
   3:	48 89 2b             	mov    %rbp,(%rbx)
   6:	48 c7 43 08 00 04 00 	movq   $0x400,0x8(%rbx)
   d:	00 
   e:	5b                   	pop    %rbx
   f:	5d                   	pop    %rbp
  10:	41 5c                	pop    %r12
  12:	c3                   	ret
  13:	f3 0f 1e fa          	endbr64
  17:	41 89 ca             	mov    %ecx,%r10d
  1a:	41 f7 c1 ff 0f 00 00 	test   $0xfff,%r9d
  21:	75 10                	jne    0x33
  23:	b8 09 00 00 00       	mov    $0x9,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 19                	ja     0x4b
  32:	c3                   	ret
  33:	c7 05 46 ef 00 00 16 	movl   $0x16,0xef46(%rip)        # 0xef83
  3a:	00 00 00 
  3d:	48                   	rex.W
  3e:	c7                   	.byte 0xc7
  3f:	c0                   	.byte 0xc0

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 19                	ja     0x21
   8:	c3                   	ret
   9:	c7 05 46 ef 00 00 16 	movl   $0x16,0xef46(%rip)        # 0xef59
  10:	00 00 00 
  13:	48                   	rex.W
  14:	c7                   	.byte 0xc7
  15:	c0                   	.byte 0xc0
[ 4210.040310][    C2] RSP: 002b:00007ffe97541b08 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
[ 4210.040521][    C2] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fca18a2c287
[ 4210.040731][    C2] RDX: 0000000000000003 RSI: 0000000000006000 RDI: 00007fca189e5000
[ 4210.040942][    C2] RBP: 00007ffe97542220 R08: 0000000000000005 R09: 00000000001f5000
[ 4210.041158][    C2] R10: 0000000000000812 R11: 0000000000000246 R12: 00007ffe97541ba0
[ 4210.041369][    C2] R13: 00007ffe975422c0 R14: 0000000000000000 R15: 00007fca189fd940
| [ 4210.041684][    C2] ==================================================================
| [ 4210.041907][    C2] Disabling lock debugging due to kernel taint
| [ 4210.042119][    C2] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN NOPTI
| [ 4210.042433][    C2] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
[ 4210.042885][    C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 4210.043197][ C2] RIP: 0010:sock_def_write_space_wfree (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 net/core/sock.c:3397) 
[ 4210.043377][ C2] Code: 00 4c 8b bb a0 01 00 00 be 08 00 00 00 4d 8d 77 08 4c 89 f7 e8 e0 0e 8b fe 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 fe 00 00 00 49 8b 47 08 a8 04 0f 85 dc fe ff ff
All code
========
   0:	00 4c 8b bb          	add    %cl,-0x45(%rbx,%rcx,4)
   4:	a0 01 00 00 be 08 00 	movabs 0x8be000001,%al
   b:	00 00 
   d:	4d 8d 77 08          	lea    0x8(%r15),%r14
  11:	4c 89 f7             	mov    %r14,%rdi
  14:	e8 e0 0e 8b fe       	call   0xfffffffffe8b0ef9
  19:	4c 89 f2             	mov    %r14,%rdx
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df 
  26:	48 c1 ea 03          	shr    $0x3,%rdx
  2a:*	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)		<-- trapping instruction
  2e:	0f 85 fe 00 00 00    	jne    0x132
  34:	49 8b 47 08          	mov    0x8(%r15),%rax
  38:	a8 04                	test   $0x4,%al
  3a:	0f 85 dc fe ff ff    	jne    0xffffffffffffff1c

Code starting with the faulting instruction
===========================================
   0:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   4:	0f 85 fe 00 00 00    	jne    0x108
   a:	49 8b 47 08          	mov    0x8(%r15),%rax
   e:	a8 04                	test   $0x4,%al
  10:	0f 85 dc fe ff ff    	jne    0xfffffffffffffef2
[ 4210.043888][    C2] RSP: 0018:ffffc90000230c30 EFLAGS: 00010202
[ 4210.044068][    C2] RAX: dffffc0000000000 RBX: ffff88800bc2b340 RCX: ffffffffa9d9564a
[ 4210.044278][    C2] RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffffaf2fda00
[ 4210.044488][    C2] RBP: ffff88800bc2b3a0 R08: 0000000000000001 R09: fffffbfff5e5fb40
[ 4210.044693][    C2] R10: ffffffffaf2fda07 R11: 205d324320202020 R12: 0000000000000000
[ 4210.044905][    C2] R13: ffff88800bc2b4c0 R14: 0000000000000008 R15: 0000000000000000
[ 4210.045119][    C2] FS:  0000000000000000(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[ 4210.045360][    C2] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4210.045534][    C2] CR2: 00007fca189f8270 CR3: 00000000114e4003 CR4: 0000000000770ef0
[ 4210.045744][    C2] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4210.045951][    C2] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4210.046157][    C2] PKRU: 55555554
[ 4210.046262][    C2] Call Trace:
[ 4210.046368][    C2]  <IRQ>
[ 4210.046439][ C2] ? die_addr (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:460) 
[ 4210.046548][ C2] ? exc_general_protection (arch/x86/kernel/traps.c:702 arch/x86/kernel/traps.c:644) 
[ 4210.046691][ C2] ? asm_exc_general_protection (./arch/x86/include/asm/idtentry.h:617) 
[ 4210.046839][ C2] ? add_taint (./arch/x86/include/asm/bitops.h:60 ./include/asm-generic/bitops/instrumented-atomic.h:29 kernel/panic.c:555) 
[ 4210.046952][ C2] ? sock_def_write_space_wfree (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 net/core/sock.c:3397) 
[ 4210.047127][ C2] sock_wfree (./include/linux/rcupdate.h:810 net/core/sock.c:2471) 
[ 4210.047237][ C2] skb_release_head_state (net/core/skbuff.c:1162 (discriminator 3)) 
[ 4210.047376][ C2] consume_skb (net/core/skbuff.c:1174 net/core/skbuff.c:1189 net/core/skbuff.c:1405 net/core/skbuff.c:1399) 
[ 4210.047479][ C2] dummy_xmit (drivers/net/dummy.c:66) 
[ 4210.047584][ C2] ? trace_net_dev_start_xmit (./include/trace/events/net.h:14 (discriminator 52)) 
[ 4210.047722][ C2] dev_hard_start_xmit (./include/linux/netdevice.h:4875 ./include/linux/netdevice.h:4889 net/core/dev.c:3563 net/core/dev.c:3579) 
[ 4210.047864][ C2] sch_direct_xmit (net/sched/sch_generic.c:343) 
[ 4210.048008][ C2] ? __pfx_sch_direct_xmit (net/sched/sch_generic.c:318) 
[ 4210.048149][ C2] __qdisc_run (net/sched/sch_generic.c:416) 
[ 4210.048290][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 4210.048438][ C2] ? __pfx___qdisc_run (net/sched/sch_generic.c:412) 
[ 4210.048579][ C2] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:115 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 4210.048720][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 4210.048856][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 4210.048997][ C2] ? net_tx_action (./include/linux/spinlock.h:352 net/core/dev.c:5250) 
[ 4210.049145][ C2] net_tx_action (./include/net/sch_generic.h:217 ./include/net/pkt_sched.h:128 ./include/net/pkt_sched.h:124 net/core/dev.c:5266) 
[ 4210.049292][ C2] __do_softirq (kernel/softirq.c:554) 
[ 4210.049434][ C2] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 4210.049540][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[ 4210.049763][    C2]  </IRQ>
[ 4210.049835][    C2]  <TASK>
[ 4210.049905][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 4210.050074][ C2] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 4210.050251][ C2] Code: 10 e8 b1 00 79 fd 48 89 ef e8 e9 70 79 fd 81 e3 00 02 00 00 75 1d 9c 58 f6 c4 02 75 29 48 85 db 74 01 fb 65 ff 0d 15 5c 8d 53 <74> 0e 5b 5d c3 cc cc cc cc e8 0f d1 9c fd eb dc 0f 1f 44 00 00 5b
All code
========
   0:	10 e8                	adc    %ch,%al
   2:	b1 00                	mov    $0x0,%cl
   4:	79 fd                	jns    0x3
   6:	48 89 ef             	mov    %rbp,%rdi
   9:	e8 e9 70 79 fd       	call   0xfffffffffd7970f7
   e:	81 e3 00 02 00 00    	and    $0x200,%ebx
  14:	75 1d                	jne    0x33
  16:	9c                   	pushf
  17:	58                   	pop    %rax
  18:	f6 c4 02             	test   $0x2,%ah
  1b:	75 29                	jne    0x46
  1d:	48 85 db             	test   %rbx,%rbx
  20:	74 01                	je     0x23
  22:	fb                   	sti
  23:	65 ff 0d 15 5c 8d 53 	decl   %gs:0x538d5c15(%rip)        # 0x538d5c3f
  2a:*	74 0e                	je     0x3a		<-- trapping instruction
  2c:	5b                   	pop    %rbx
  2d:	5d                   	pop    %rbp
  2e:	c3                   	ret
  2f:	cc                   	int3
  30:	cc                   	int3
  31:	cc                   	int3
  32:	cc                   	int3
  33:	e8 0f d1 9c fd       	call   0xfffffffffd9cd147
  38:	eb dc                	jmp    0x16
  3a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3f:	5b                   	pop    %rbx

Code starting with the faulting instruction
===========================================
   0:	74 0e                	je     0x10
   2:	5b                   	pop    %rbx
   3:	5d                   	pop    %rbp
   4:	c3                   	ret
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	cc                   	int3
   9:	e8 0f d1 9c fd       	call   0xfffffffffd9cd11d
   e:	eb dc                	jmp    0xffffffffffffffec
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	5b                   	pop    %rbx
[ 4210.050833][    C2] RSP: 0018:ffffc9000058fa80 EFLAGS: 00000282
[ 4210.051176][    C2] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff5f458b4
[ 4210.051387][    C2] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffac766dc1
[ 4210.051599][    C2] RBP: ffff8880010bfa80 R08: 0000000000000001 R09: fffffbfff5f432aa
[ 4210.051894][    C2] R10: ffffffffafa19557 R11: 0000000000000008 R12: ffff8880010bfa80
[ 4210.052100][    C2] R13: ffffea0000330000 R14: ffff88800196ac40 R15: ffff88800cc015b0
[ 4210.052308][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 4210.052565][ C2] get_partial_node.part.0 (mm/slub.c:2623) 
[ 4210.052705][ C2] ___slab_alloc (mm/slub.c:2583 mm/slub.c:2701 mm/slub.c:3505) 
[ 4210.052843][ C2] ? kmem_cache_alloc (./include/linux/sched/mm.h:315 mm/slub.c:3746 mm/slub.c:3827 mm/slub.c:3852) 
[ 4210.052986][ C2] ? vm_area_alloc (kernel/fork.c:441 kernel/fork.c:472) 
[ 4210.053206][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 4210.053346][ C2] ? vm_area_alloc (kernel/fork.c:441 kernel/fork.c:472) 
[ 4210.053482][ C2] ? kmem_cache_alloc (mm/slub.c:3610 mm/slub.c:3663 mm/slub.c:3835 mm/slub.c:3852) 
[ 4210.053620][ C2] kmem_cache_alloc (mm/slub.c:3610 mm/slub.c:3663 mm/slub.c:3835 mm/slub.c:3852) 
[ 4210.053761][ C2] vm_area_alloc (kernel/fork.c:441 kernel/fork.c:472) 
[ 4210.053978][ C2] mmap_region (mm/mmap.c:2807) 
[ 4210.054117][ C2] ? __pfx_arch_get_unmapped_area_topdown (arch/x86/kernel/sys_x86_64.c:157) 
[ 4210.054294][ C2] ? __pfx_mmap_region (mm/mmap.c:2718) 
[ 4210.054436][ C2] ? get_unmapped_area (mm/mmap.c:1854) 
[ 4210.054659][ C2] do_mmap (mm/mmap.c:1385) 
[ 4210.054764][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 4210.054902][ C2] ? __fget_files (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 fs/file.c:1037) 
[ 4210.055040][ C2] vm_mmap_pgoff (mm/util.c:573) 
[ 4210.055262][ C2] ? __pfx_vm_mmap_pgoff (mm/util.c:563) 
[ 4210.055398][ C2] ? __fget_files (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 fs/file.c:1037) 
[ 4210.055539][ C2] ? __fget_files (fs/file.c:1040) 
[ 4210.055684][ C2] ksys_mmap_pgoff (mm/mmap.c:1431) 
[ 4210.055903][ C2] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 4210.056041][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[ 4210.056210][    C2] RIP: 0033:0x7fca18a2c287
[ 4210.056349][ C2] Code: c3 66 90 48 89 2b 48 c7 43 08 00 04 00 00 5b 5d 41 5c c3 f3 0f 1e fa 41 89 ca 41 f7 c1 ff 0f 00 00 75 10 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 19 c3 c7 05 46 ef 00 00 16 00 00 00 48 c7 c0
All code
========
   0:	c3                   	ret
   1:	66 90                	xchg   %ax,%ax
   3:	48 89 2b             	mov    %rbp,(%rbx)
   6:	48 c7 43 08 00 04 00 	movq   $0x400,0x8(%rbx)
   d:	00 
   e:	5b                   	pop    %rbx
   f:	5d                   	pop    %rbp
  10:	41 5c                	pop    %r12
  12:	c3                   	ret
  13:	f3 0f 1e fa          	endbr64
  17:	41 89 ca             	mov    %ecx,%r10d
  1a:	41 f7 c1 ff 0f 00 00 	test   $0xfff,%r9d
  21:	75 10                	jne    0x33
  23:	b8 09 00 00 00       	mov    $0x9,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 19                	ja     0x4b
  32:	c3                   	ret
  33:	c7 05 46 ef 00 00 16 	movl   $0x16,0xef46(%rip)        # 0xef83
  3a:	00 00 00 
  3d:	48                   	rex.W
  3e:	c7                   	.byte 0xc7
  3f:	c0                   	.byte 0xc0

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 19                	ja     0x21
   8:	c3                   	ret
   9:	c7 05 46 ef 00 00 16 	movl   $0x16,0xef46(%rip)        # 0xef59
  10:	00 00 00 
  13:	48                   	rex.W
  14:	c7                   	.byte 0xc7
  15:	c0                   	.byte 0xc0
[ 4210.056933][    C2] RSP: 002b:00007ffe97541b08 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
[ 4210.057142][    C2] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fca18a2c287
[ 4210.057430][    C2] RDX: 0000000000000003 RSI: 0000000000006000 RDI: 00007fca189e5000
[ 4210.057638][    C2] RBP: 00007ffe97542220 R08: 0000000000000005 R09: 00000000001f5000
[ 4210.057925][    C2] R10: 0000000000000812 R11: 0000000000000246 R12: 00007ffe97541ba0


Finger prints:
dump_stack_lvl:kasan_report:kasan_check_range:sock_def_write_space_wfree
sock_def_write_space_wfree:sock_wfree:skb_release_head_state:consume_skb