======================================
| [  116.151986][  T819] tc (819) used greatest stack depth: 23288 bytes left
| [  156.582616][    C3] ------------[ cut here ]------------
| [  156.583055][    C3] kernel BUG at net/core/skbuff.c:2813!
| [  156.583292][    C3] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[  156.583834][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 156.584221][ C3] RIP: 0010:__pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 156.584451][ C3] Code: e9 52 f7 ff ff 48 8b 7c 24 38 be 02 00 00 00 e8 8e 9c ff ff 48 83 c4 58 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 90 <0f> 0b 48 c7 44 24 38 00 00 00 00 e9 dc fa ff ff 84 c9 0f 84 4b f9
All code
========
   0:	e9 52 f7 ff ff       	jmp    0xfffffffffffff757
   5:	48 8b 7c 24 38       	mov    0x38(%rsp),%rdi
   a:	be 02 00 00 00       	mov    $0x2,%esi
   f:	e8 8e 9c ff ff       	call   0xffffffffffff9ca2
  14:	48 83 c4 58          	add    $0x58,%rsp
  18:	31 c0                	xor    %eax,%eax
  1a:	5b                   	pop    %rbx
  1b:	41 5c                	pop    %r12
  1d:	41 5d                	pop    %r13
  1f:	41 5e                	pop    %r14
  21:	41 5f                	pop    %r15
  23:	5d                   	pop    %rbp
  24:	c3                   	ret
  25:	cc                   	int3
  26:	cc                   	int3
  27:	cc                   	int3
  28:	cc                   	int3
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	48 c7 44 24 38 00 00 	movq   $0x0,0x38(%rsp)
  33:	00 00 
  35:	e9 dc fa ff ff       	jmp    0xfffffffffffffb16
  3a:	84 c9                	test   %cl,%cl
  3c:	0f                   	.byte 0xf
  3d:	84 4b f9             	test   %cl,-0x7(%rbx)

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	48 c7 44 24 38 00 00 	movq   $0x0,0x38(%rsp)
   9:	00 00 
   b:	e9 dc fa ff ff       	jmp    0xfffffffffffffaec
  10:	84 c9                	test   %cl,%cl
  12:	0f                   	.byte 0xf
  13:	84 4b f9             	test   %cl,-0x7(%rbx)
[  156.585058][    C3] RSP: 0018:ffffc90000278188 EFLAGS: 00010282
[  156.585274][    C3] RAX: 00000000fffffff2 RBX: ffff888004216434 RCX: 0000000000000004
[  156.585543][    C3] RDX: dffffc0000000000 RSI: 1ffff11000a377d9 RDI: ffff8880051bbec8
[  156.585806][    C3] RBP: ffffc90000278208 R08: 00000000000007b4 R09: ffff88800421647c
[  156.586065][    C3] R10: ffff888004216480 R11: ffffffff868c9c09 R12: ffff8880042163c0
[  156.586326][    C3] R13: 0000000000000ec0 R14: ffff888004216474 R15: ffff888004216480
[  156.586586][    C3] FS:  00007f2b5d96c740(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[  156.586892][    C3] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  156.587107][    C3] CR2: 000055728e2ee000 CR3: 0000000005e26002 CR4: 0000000000770ef0
[  156.587365][    C3] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  156.587620][    C3] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  156.587880][    C3] PKRU: 55555554
[  156.588010][    C3] Call Trace:
[  156.588145][    C3]  <IRQ>
[ 156.588235][ C3] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 156.588368][ C3] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 156.588499][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 156.588671][ C3] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 156.588842][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 156.589012][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 156.589181][ C3] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 156.589350][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 156.589522][ C3] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 156.589696][ C3] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 156.589871][ C3] ? __do_softirq (kernel/softirq.c:553) 
[ 156.590044][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 156.590215][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813) 
[ 156.590390][ C3] tcf_csum_skb_nextlayer (./include/linux/skbuff.h:2731 ./include/linux/skbuff.h:2739 net/sched/act_csum.c:140) act_csum
[ 156.590610][ C3] ? skb_ensure_writable (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/linux/skbuff.h:1919 ./include/linux/skbuff.h:1916 net/core/skbuff.c:6109) 
[ 156.590785][ C3] tcf_csum_ipv4_udp (net/sched/act_csum.c:271) act_csum
[ 156.591000][ C3] ? tcf_pedit_act (net/sched/act_pedit.c:405) act_pedit
[ 156.591220][ C3] tcf_csum_ipv4 (net/sched/act_csum.c:423) act_csum
[ 156.591393][ C3] ? 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) 
[ 156.591567][ C3] tcf_csum_act (net/sched/act_csum.c:592) act_csum
[ 156.591745][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 156.591920][ C3] tcf_action_exec.part.0 (./include/net/tc_wrapper.h:130 net/sched/act_api.c:1100) 
[ 156.592104][ C3] fl_classify (net/sched/cls_flower.c:345) cls_flower
[ 156.592285][ C3] ? __pfx_fl_classify (net/sched/cls_flower.c:316) cls_flower
[ 156.592504][ C3] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 156.592678][ C3] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 156.592849][ C3] ? 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) 
[ 156.593019][ C3] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 156.593150][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 156.593435][ C3] ? 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) 
[ 156.593607][ C3] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) 
[ 156.593782][ C3] ? 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) 
[ 156.593955][ C3] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) 
[ 156.594124][ C3] ? 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) 
[ 156.594405][ C3] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 156.594533][ C3] ? 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) 
[ 156.594705][ C3] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 156.594876][ C3] __tcf_classify.constprop.0 (./include/net/tc_wrapper.h:197 net/sched/cls_api.c:1768) 
[ 156.595165][ C3] tcf_classify (net/sched/cls_api.c:1813) 
[ 156.595295][ C3] ? __pfx_tcf_classify (net/sched/cls_api.c:1813) 
[ 156.595470][ C3] prio_enqueue (net/sched/sch_prio.c:44 net/sched/sch_prio.c:75) sch_prio
[ 156.595644][ C3] ? __pfx_prio_enqueue (net/sched/sch_prio.c:70) sch_prio
[ 156.595979][ C3] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:115 ./include/linux/atomic/atomic-arch-fallback.h:2164 ./include/linux/atomic/atomic-instrumented.h:1296 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 156.596151][ C3] dev_qdisc_enqueue (net/core/dev.c:3758) 
[ 156.596324][ C3] __dev_xmit_skb (./include/net/sch_generic.h:194 net/core/dev.c:3850) 
[ 156.596495][ C3] ? lock_sync (kernel/locking/lockdep.c:116 kernel/locking/lockdep.c:5794) 
[ 156.596667][ C3] ? __pfx___dev_xmit_skb (net/core/dev.c:3767) 
[ 156.596957][ C3] __dev_queue_xmit (net/core/dev.c:4338) 
[ 156.597130][ C3] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) 
[ 156.597304][ C3] ? eth_header (net/ethernet/eth.c:100) 
[ 156.597475][ C3] ? __pfx___dev_queue_xmit (net/core/dev.c:4281) 
[ 156.597648][ C3] ? neigh_resolve_output (./include/linux/netdevice.h:3226 net/core/neighbour.c:1558 net/core/neighbour.c:1543) 
[ 156.597820][ C3] ? __neigh_update (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/neighbour.c:1446) 
[ 156.597991][ C3] __neigh_update (net/core/neighbour.c:1461) 
[ 156.598168][ C3] arp_process (./include/linux/instrumented.h:96 (discriminator 4) ./include/linux/atomic/atomic-instrumented.h:400 (discriminator 4) ./include/linux/refcount.h:261 (discriminator 4) ./include/linux/refcount.h:304 (discriminator 4) ./include/linux/refcount.h:322 (discriminator 4) ./include/net/neighbour.h:444 (discriminator 4) net/ipv4/arp.c:934 (discriminator 4)) 
[ 156.598453][ C3] ? __pfx_arp_process (net/ipv4/arp.c:699) 
[ 156.598627][ C3] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 156.598799][ C3] ? __pfx_arp_rcv (net/ipv4/arp.c:965) 
[ 156.598969][ C3] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 5)) 
[ 156.599293][ C3] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 156.599505][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 156.599675][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 156.599848][ C3] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 156.600132][ C3] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 156.600305][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 156.600476][ C3] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 156.600648][ C3] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 156.600933][ C3] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 156.601105][ C3] ? ktime_get (kernel/time/timekeeping.c:195 (discriminator 4) kernel/time/timekeeping.c:289 (discriminator 4) kernel/time/timekeeping.c:388 (discriminator 4) kernel/time/timekeeping.c:848 (discriminator 4)) 
[ 156.601234][ C3] ? hrtimer_interrupt (kernel/time/hrtimer.c:1812) 
[ 156.601406][ C3] __do_softirq (kernel/softirq.c:553) 
[ 156.601577][ C3] ? __neigh_event_send (./include/linux/bottom_half.h:33 net/core/neighbour.c:1245) 
[ 156.601751][ C3] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) 
[  156.601883][    C3]  </IRQ>
[  156.601980][    C3]  <TASK>
[ 156.602067][ C3] __local_bh_enable_ip (kernel/softirq.c:381) 
[ 156.602239][ C3] __neigh_event_send (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/neigh.h:237 net/core/neighbour.c:1246) 
[ 156.602522][ C3] ? do_raw_write_lock (kernel/locking/spinlock_debug.c:187 kernel/locking/spinlock_debug.c:210) 
[ 156.602694][ C3] ? __pfx_do_raw_write_lock (kernel/locking/spinlock_debug.c:209) 
[ 156.602865][ C3] neigh_resolve_output (net/core/neighbour.c:1547) 
[ 156.603034][ C3] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:386) 
[ 156.603206][ C3] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9)) 
[ 156.603490][ C3] ip_finish_output2 (./include/net/neighbour.h:542 net/ipv4/ip_output.c:235) 
[ 156.603663][ C3] ? kfree (./include/trace/events/kmem.h:94 mm/slub.c:4396) 
[ 156.603798][ C3] ? ip_select_ident_segs (./arch/x86/include/asm/atomic.h:85 ./include/linux/atomic/atomic-arch-fallback.h:564 ./include/linux/atomic/atomic-instrumented.h:124 ./include/net/ip.h:561) 
[ 156.603967][ C3] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) 
[ 156.604248][ C3] ? __ip_finish_output (./include/linux/skbuff.h:1624 ./include/linux/skbuff.h:4942 net/ipv4/ip_output.c:307 net/ipv4/ip_output.c:295) 
[ 156.604419][ C3] ip_output (./include/linux/netfilter.h:303 net/ipv4/ip_output.c:433) 
[ 156.604547][ C3] ? __ip_local_out (net/ipv4/ip_output.c:96 net/ipv4/ip_output.c:107) 
[ 156.604727][ C3] ? __pfx_ip_output (net/ipv4/ip_output.c:427) 
[ 156.604897][ C3] ? ip_make_skb (net/ipv4/ip_output.c:1570) 
[ 156.605291][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 156.605460][ C3] ? __pfx_ip_make_skb (net/ipv4/ip_output.c:1546) 
[ 156.605631][ C3] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 156.605801][ C3] ip_send_skb (./include/net/dst.h:450 net/ipv4/ip_output.c:129 net/ipv4/ip_output.c:1496) 
[ 156.606084][ C3] udp_send_skb (net/ipv4/udp.c:963) 
[ 156.606256][ C3] udp_sendmsg (net/ipv4/udp.c:1250) 
[ 156.606428][ C3] ? 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) 
[ 156.606601][ C3] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 156.606851][ C3] ? __pfx_ip_generic_getfrag (net/ipv4/ip_output.c:935) 
[ 156.607024][ C3] ? __pfx_udp_sendmsg (net/ipv4/udp.c:1039) 
[ 156.607197][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 156.607369][ C3] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 156.607542][ C3] ? __unix_dgram_recvmsg (net/unix/af_unix.c:2517) 
[ 156.607716][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 156.607890][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 156.608062][ C3] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:115 ./include/linux/atomic/atomic-arch-fallback.h:2164 ./include/linux/atomic/atomic-instrumented.h:1296 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 156.608232][ C3] ? __unix_dgram_recvmsg (net/unix/af_unix.c:2517) 
[ 156.608516][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 156.608686][ C3] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 156.608856][ C3] ? __unix_dgram_recvmsg (net/unix/af_unix.c:2517) 
[ 156.609028][ C3] ? sock_write_iter (net/socket.c:730 net/socket.c:745 net/socket.c:1160) 
[ 156.609311][ C3] sock_write_iter (net/socket.c:730 net/socket.c:745 net/socket.c:1160) 
[ 156.609482][ C3] ? __pfx_sock_write_iter (net/socket.c:1144) 
[ 156.609659][ C3] vfs_write (./include/linux/fs.h:2087 fs/read_write.c:497 fs/read_write.c:590) 
[ 156.609789][ C3] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 156.609961][ C3] ? __pfx_vfs_write (fs/read_write.c:571) 
[ 156.610246][ C3] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 156.610418][ C3] ? __pfx_find_vma (mm/mmap.c:1883) 
[ 156.610591][ C3] ksys_write (fs/read_write.c:643) 
[ 156.610719][ C3] ? __pfx_ksys_write (fs/read_write.c:633) 
[ 156.611003][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 156.611174][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[  156.611388][    C3] RIP: 0033:0x7f2b5daf8957
[ 156.611565][ C3] Code: 0b 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
All code
========
   0:	0b 00                	or     (%rax),%eax
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b7                	jmp    0xffffffffffffffc7
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 01 00 00 00       	mov    $0x1,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	48 89 54 24 18       	mov    %rdx,0x18(%rsp)
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	74 24                	je     0x64

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	48 89 54 24 18       	mov    %rdx,0x18(%rsp)
  12:	48                   	rex.W
  13:	89                   	.byte 0x89
  14:	74 24                	je     0x3a
[  156.612302][    C3] RSP: 002b:00007ffdd4153068 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  156.612561][    C3] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2b5daf8957
[  156.612866][    C3] RDX: 00000000000007b4 RSI: 000055728e2ee000 RDI: 0000000000000008
[  156.613280][    C3] RBP: 000055728e2ee000 R08: 00000000000007b4 R09: 0000000000000000
[  156.613704][    C3] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000008


Finger prints:
__pskb_pull_tail:tcf_csum_skb_nextlayer:tcf_csum_ipv4_udp:tcf_csum_ipv4