======================================
| xx__-> [  359.503120][    C0] ==================================================================
| [  359.503409][    C0] BUG: KASAN: slab-use-after-free in tcp_v6_send_response (./include/linux/instrumented.h:82 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 ./include/net/inet_sock.h:411 net/ipv6/tcp_ipv6.c:983)
| [  359.503650][    C0] Read of size 8 at addr ff11000005d7d0d8 by task iperf3/8233
| [  359.503893][    C0]
[  359.503980][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  359.503982][    C0] Call Trace:
[  359.503984][    C0]  <IRQ>
[  359.503985][    C0]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  359.503990][    C0]  print_address_description.constprop.0 (mm/kasan/report.c:378)
[  359.503994][    C0]  print_report (mm/kasan/report.c:482)
[  359.503996][    C0]  ? __virt_addr_valid (./include/linux/rcupdate.h:948 ./include/linux/mmzone.h:2276 arch/x86/mm/physaddr.c:54)
[  359.503999][    C0]  ? __virt_addr_valid (./include/linux/rcupdate.h:974 (discriminator 1) ./include/linux/mmzone.h:2286 (discriminator 1) arch/x86/mm/physaddr.c:54 (discriminator 1))
[  359.504001][    C0]  kasan_report (mm/kasan/report.c:595)
[  359.504004][    C0]  ? tcp_v6_send_response (./include/linux/instrumented.h:82 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 ./include/net/inet_sock.h:411 net/ipv6/tcp_ipv6.c:983)
[  359.504006][    C0]  ? tcp_v6_send_response (./include/linux/instrumented.h:82 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 ./include/net/inet_sock.h:411 net/ipv6/tcp_ipv6.c:983)
[  359.504008][    C0]  kasan_check_range (mm/kasan/generic.c:186 mm/kasan/generic.c:200)
[  359.504010][    C0]  ? make_kuid (kernel/user_namespace.c:340 kernel/user_namespace.c:425)
[  359.504013][    C0]  tcp_v6_send_response (./include/linux/instrumented.h:82 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 ./include/net/inet_sock.h:411 net/ipv6/tcp_ipv6.c:983)
[  359.504014][    C0]  ? __mod_timer (kernel/time/timer.c:1139 (discriminator 3))
[  359.504018][    C0]  ? tcp_v6_send_synack (./include/net/inet_sock.h:338 (discriminator 1))
[  359.504019][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[  359.504022][    C0]  ? logarithmic_accumulation.constprop.0 (kernel/time/timekeeping.c:2518 (discriminator 1) kernel/time/timekeeping.c:2568 (discriminator 1))
[  359.504025][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[  359.504027][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[  359.504030][    C0]  tcp_v6_rcv (net/ipv6/tcp_ipv6.c:1149 net/ipv6/tcp_ipv6.c:1201 net/ipv6/tcp_ipv6.c:1993)
[  359.504034][    C0]  ? tcp_v6_syn_recv_sock (./include/net/sock.h:1574)
[  359.504037][    C0]  ? nf_hook_egress (./include/linux/netfilter_netdev.h:114)
[  359.504040][    C0]  ? is_bpf_text_address (./include/linux/rcupdate.h:882 kernel/bpf/core.c:751)
[  359.504043][    C0]  ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:479)
[  359.504046][    C0]  ip6_input_finish (net/ipv6/ip6_input.c:534)
[  359.504048][    C0]  ip6_input (./include/linux/netfilter.h:325 ./include/linux/netfilter.h:319 net/ipv6/ip6_input.c:545)
[  359.504049][    C0]  ? ip6_input_finish (net/ipv6/ip6_input.c:527 (discriminator 46))
[  359.504051][    C0]  ? ip6_rcv_core (./include/linux/skbuff.h:3432 net/ipv6/ip6_input.c:332)
[  359.504053][    C0]  ipv6_rcv (./include/net/dst.h:480 (discriminator 4) net/ipv6/ip6_input.c:119 (discriminator 4) ./include/linux/netfilter.h:325 (discriminator 4) ./include/linux/netfilter.h:319 (discriminator 4) net/ipv6/ip6_input.c:351 (discriminator 4))
[  359.504054][    C0]  ? ip6_rcv_core (net/ipv6/ip6_input.c:211 (discriminator 96))
[  359.504056][    C0]  ? mark_usage (kernel/locking/lockdep.c:4690)
[  359.504058][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[  359.504059][    C0]  ? irq_matrix_free (kernel/irq/matrix.c:429 (discriminator 2))
[  359.504063][    C0]  ? process_backlog (./include/linux/local_lock_internal.h:62 (discriminator 2) net/core/dev.c:6726 (discriminator 2))
[  359.504065][    C0]  __netif_receive_skb_one_core (net/core/dev.c:6264)
[  359.504067][    C0]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[  359.504069][    C0]  ? process_backlog (./include/linux/local_lock_internal.h:62 (discriminator 2) net/core/dev.c:6726 (discriminator 2))
[  359.504071][    C0]  ? __netif_receive_skb_list_core (net/core/dev.c:6310)
[  359.504073][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[  359.504075][    C0]  process_backlog (net/core/dev.c:6728)
[  359.504078][    C0]  __napi_poll (net/core/dev.c:7787)
[  359.504080][    C0]  net_rx_action (net/core/dev.c:7850 net/core/dev.c:8007)
[  359.504083][    C0]  ? wakeup_preempt_fair (kernel/sched/fair.c:6515 kernel/sched/fair.c:10016)
[  359.504086][    C0]  ? __napi_poll (./include/net/gro.h:507)
[  359.504088][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[  359.504092][    C0]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[  359.504094][    C0]  handle_softirqs (kernel/softirq.c:645)
[  359.504097][    C0]  ? _local_bh_enable (kernel/softirq.c:428 (discriminator 1))
[  359.504099][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[  359.504100][    C0]  ? trace_csd_function_exit (./include/trace/events/csd.h:64 (discriminator 22))
[  359.504102][    C0]  ? __dev_queue_xmit (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:920 (discriminator 2) net/core/dev.c:4961 (discriminator 2))
[  359.504104][    C0]  do_softirq (kernel/softirq.c:546 (discriminator 19) kernel/softirq.c:533 (discriminator 19))
[  359.504106][    C0]  </IRQ>
[  359.504107][    C0]  <TASK>
[  359.504107][    C0]  __local_bh_enable_ip (kernel/softirq.c:473)
[  359.504109][    C0]  __dev_queue_xmit (./include/linux/bottom_half.h:33 (discriminator 2) ./include/linux/rcupdate.h:923 (discriminator 2) net/core/dev.c:4961 (discriminator 2))
[  359.504111][    C0]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[  359.504113][    C0]  ? push_cpu_stop (kernel/sched/core.c:2762 (discriminator 4))
[  359.504115][    C0]  ? netdev_core_pick_tx (net/core/dev.c:4784)
[  359.504117][    C0]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:124 (discriminator 1) kernel/locking/lockdep.c:5884 (discriminator 1))
[  359.504119][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[  359.504120][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[  359.504122][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[  359.504123][    C0]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[  359.504128][    C0]  ? __asan_memcpy (mm/kasan/shadow.c:106 (discriminator 1))
[  359.504131][    C0]  ? neigh_hh_output (./include/net/neighbour.h:525)
[  359.504134][    C0]  ip6_finish_output2 (./include/net/neighbour.h:558 net/ipv6/ip6_output.c:138)
[  359.504137][    C0]  ? ip6_dst_lookup (net/ipv6/ip6_output.c:1297)
[  359.504138][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[  359.504140][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[  359.504142][    C0]  ? ip6_mtu (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) ./include/net/ip6_route.h:384 (discriminator 2) net/ipv6/route.c:3290 (discriminator 2))
[  359.504145][    C0]  ip6_finish_output (net/ipv6/ip6_output.c:210 net/ipv6/ip6_output.c:221)
[  359.504148][    C0]  ip6_output (./include/linux/netfilter.h:314 net/ipv6/ip6_output.c:248)
[  359.504150][    C0]  ? ip6_finish_output (./include/linux/skbuff.h:1165)
[  359.504152][    C0]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[  359.504153][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[  359.504155][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[  359.504157][    C0]  ip6_xmit (./include/net/dst.h:470 (discriminator 4) ./include/linux/netfilter.h:325 (discriminator 4) ./include/linux/netfilter.h:319 (discriminator 4) net/ipv6/ip6_output.c:381 (discriminator 4))
[  359.504159][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[  359.504162][    C0]  ? ip6_autoflowlabel (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[  359.504164][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[  359.504165][    C0]  ? mark_usage (kernel/locking/lockdep.c:4690)
[  359.504167][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[  359.504169][    C0]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[  359.504170][    C0]  ? inet6_csk_xmit (./include/linux/rcupdate.h:309 (discriminator 2) ./include/linux/rcupdate.h:849 (discriminator 2) net/ipv6/inet6_connection_sock.c:120 (discriminator 2))
[  359.504173][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[  359.504174][    C0]  ? inet6_csk_route_socket (./include/net/ip6_route.h:255 net/ipv6/inet6_connection_sock.c:94)
[  359.504176][    C0]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[  359.504178][    C0]  inet6_csk_xmit (net/ipv6/inet6_connection_sock.c:123 (discriminator 13))
[  359.504180][    C0]  __tcp_transmit_skb (net/ipv4/tcp_output.c:1716)
[  359.504185][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[  359.504187][    C0]  ? __tcp_select_window (./include/net/tcp.h:1755)
[  359.504189][    C0]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[  359.504190][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[  359.504194][    C0]  tcp_write_xmit (net/ipv4/tcp_output.c:1734 net/ipv4/tcp_output.c:3070)
[  359.504197][    C0]  ? tcp_retrans_try_collapse (./arch/x86/include/asm/atomic.h:23)
[  359.504199][    C0]  ? skb_attempt_defer_free (./include/linux/bottom_half.h:33 (discriminator 2) net/core/skbuff.c:7319 (discriminator 2) net/core/skbuff.c:7351 (discriminator 2))
[  359.504202][    C0]  ? tcp_set_state (net/ipv4/tcp.c:3028)
[  359.504204][    C0]  __tcp_push_pending_frames (net/ipv4/tcp_output.c:3253 (discriminator 1))
[  359.504206][    C0]  __tcp_close (net/ipv4/tcp.c:3220)
[  359.504208][    C0]  tcp_close (net/ipv4/tcp.c:3311)
[  359.504210][    C0]  inet_release (net/ipv4/af_inet.c:442)
[  359.504213][    C0]  ? fcntl_setlk (fs/locks.c:2556)
[  359.504216][    C0]  __sock_release (net/socket.c:735)
[  359.504219][    C0]  sock_close (net/socket.c:1526 (discriminator 1))
[  359.504221][    C0]  __fput (fs/file_table.c:512)
[  359.504224][    C0]  fput_close_sync (fs/file_table.c:617)
[  359.504226][    C0]  ? alloc_file_clone (fs/file_table.c:479)
[  359.504228][    C0]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[  359.504230][    C0]  __x64_sys_close (fs/open.c:1560 fs/open.c:1545 fs/open.c:1545)
[  359.504232][    C0]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[  359.504234][    C0]  ? irq_exit_rcu (kernel/softirq.c:786)
[  359.504236][    C0]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  359.504238][    C0] RIP: 0033:0x7f1e93d6a312
[  359.504241][    C0] Code: 08 0f 85 71 41 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 55 bf 01 00
All code
========
   0:	08 0f                	or     %cl,(%rdi)
   2:	85 71 41             	test   %esi,0x41(%rcx)
   5:	ff                   	(bad)
   6:	ff 49 89             	decl   -0x77(%rcx)
   9:	fb                   	sti
   a:	48 89 f0             	mov    %rsi,%rax
   d:	48 89 d7             	mov    %rdx,%rdi
  10:	48 89 ce             	mov    %rcx,%rsi
  13:	4c 89 c2             	mov    %r8,%rdx
  16:	4d 89 ca             	mov    %r9,%r10
  19:	4c 8b 44 24 08       	mov    0x8(%rsp),%r8
  1e:	4c 8b 4c 24 10       	mov    0x10(%rsp),%r9
  23:	4c 89 5c 24 08       	mov    %r11,0x8(%rsp)
  28:	0f 05                	syscall
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  32:	00 00 00 
  35:	0f 1f 00             	nopl   (%rax)
  38:	f3 0f 1e fa          	endbr64
  3c:	55                   	push   %rbp
  3d:	bf                   	.byte 0xbf
  3e:	01 00                	add    %eax,(%rax)

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   8:	00 00 00 
   b:	0f 1f 00             	nopl   (%rax)
   e:	f3 0f 1e fa          	endbr64
  12:	55                   	push   %rbp
  13:	bf                   	.byte 0xbf
  14:	01 00                	add    %eax,(%rax)
[  359.504243][    C0] RSP: 002b:00007ffd3814ee78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[  359.504247][    C0] RAX: ffffffffffffffda RBX: 0000561b06801d30 RCX: 00007f1e93d6a312
[  359.504248][    C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007
[  359.504249][    C0] RBP: 00007ffd3814eea0 R08: 0000000000000000 R09: 0000000000000000
[  359.504250][    C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000561b067ff010


Finger prints:
print_report:kasan_report:kasan_check_range:tcp_v6_send_response:tcp_v6_rcv