======================================
| xx__-> [ 1256.166830][    C1] ==================================================================
| [ 1256.167266][    C1] BUG: KASAN: slab-out-of-bounds 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)
| [ 1256.167629][    C1] Read of size 8 at addr ff110000109b5278 by task tcp_fastopen_ba/22340
| [ 1256.167931][    C1]
[ 1256.168086][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1256.168088][    C1] Call Trace:
[ 1256.168090][    C1]  <IRQ>
[ 1256.168092][    C1]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[ 1256.168098][    C1]  print_address_description.constprop.0 (mm/kasan/report.c:378)
[ 1256.168104][    C1]  print_report (mm/kasan/report.c:482)
[ 1256.168106][    C1]  ? __virt_addr_valid (./include/linux/rcupdate.h:948 ./include/linux/mmzone.h:2276 arch/x86/mm/physaddr.c:54)
[ 1256.168110][    C1]  ? __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))
[ 1256.168112][    C1]  kasan_report (mm/kasan/report.c:595)
[ 1256.168116][    C1]  ? 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)
[ 1256.168119][    C1]  ? 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)
[ 1256.168123][    C1]  kasan_check_range (mm/kasan/generic.c:186 mm/kasan/generic.c:200)
[ 1256.168130][    C1]  ? make_kuid (kernel/user_namespace.c:340 kernel/user_namespace.c:425)
[ 1256.168136][    C1]  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)
[ 1256.168142][    C1]  ? __mod_timer (kernel/time/timer.c:1139 (discriminator 3))
[ 1256.168148][    C1]  ? tcp_v6_send_synack (./include/net/inet_sock.h:338 (discriminator 1))
[ 1256.168150][    C1]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[ 1256.168154][    C1]  ? logarithmic_accumulation.constprop.0 (kernel/time/timekeeping.c:2518 (discriminator 1) kernel/time/timekeeping.c:2568 (discriminator 1))
[ 1256.168163][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[ 1256.168166][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[ 1256.168171][    C1]  tcp_v6_rcv (net/ipv6/tcp_ipv6.c:1149 net/ipv6/tcp_ipv6.c:1201 net/ipv6/tcp_ipv6.c:1993)
[ 1256.168178][    C1]  ? tcp_v6_syn_recv_sock (./include/net/sock.h:1574)
[ 1256.168180][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[ 1256.168186][    C1]  ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:479)
[ 1256.168192][    C1]  ip6_input_finish (net/ipv6/ip6_input.c:534)
[ 1256.168195][    C1]  ip6_input (./include/linux/netfilter.h:325 ./include/linux/netfilter.h:319 net/ipv6/ip6_input.c:545)
[ 1256.168196][    C1]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[ 1256.168200][    C1]  ? ip6_input_finish (net/ipv6/ip6_input.c:527 (discriminator 46))
[ 1256.168202][    C1]  ? ip6_rcv_core (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) net/ipv6/ip6_input.c:328 (discriminator 2))
[ 1256.168204][    C1]  ? __asan_memset (mm/kasan/shadow.c:84 (discriminator 1))
[ 1256.168208][    C1]  ? ip6_rcv_core (./include/linux/rcupdate.h:882 net/ipv6/ip6_input.c:328)
[ 1256.168211][    C1]  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))
[ 1256.168213][    C1]  ? ip6_rcv_core (net/ipv6/ip6_input.c:211 (discriminator 96))
[ 1256.168215][    C1]  ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[ 1256.168218][    C1]  ? mark_usage (kernel/locking/lockdep.c:4690)
[ 1256.168220][    C1]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[ 1256.168224][    C1]  ? process_backlog (./include/linux/local_lock_internal.h:62 (discriminator 2) net/core/dev.c:6726 (discriminator 2))
[ 1256.168227][    C1]  __netif_receive_skb_one_core (net/core/dev.c:6264)
[ 1256.168230][    C1]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[ 1256.168232][    C1]  ? process_backlog (./include/linux/local_lock_internal.h:62 (discriminator 2) net/core/dev.c:6726 (discriminator 2))
[ 1256.168235][    C1]  ? __netif_receive_skb_list_core (net/core/dev.c:6310)
[ 1256.168237][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[ 1256.168240][    C1]  process_backlog (net/core/dev.c:6728)
[ 1256.168243][    C1]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[ 1256.168246][    C1]  __napi_poll (net/core/dev.c:7787)
[ 1256.168249][    C1]  net_rx_action (net/core/dev.c:7850 net/core/dev.c:8007)
[ 1256.168253][    C1]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[ 1256.168255][    C1]  ? __napi_poll (./include/net/gro.h:507)
[ 1256.168261][    C1]  ? ktime_get_update_offsets_now (kernel/time/timekeeping.c:304 kernel/time/timekeeping.c:482 kernel/time/timekeeping.c:2859)
[ 1256.168264][    C1]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[ 1256.168267][    C1]  handle_softirqs (kernel/softirq.c:645)
[ 1256.168271][    C1]  ? _local_bh_enable (kernel/softirq.c:428 (discriminator 1))
[ 1256.168273][    C1]  ? 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)
[ 1256.168276][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[ 1256.168278][    C1]  ? __dev_queue_xmit (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:920 (discriminator 2) net/core/dev.c:4961 (discriminator 2))
[ 1256.168281][    C1]  do_softirq (kernel/softirq.c:546 (discriminator 19) kernel/softirq.c:533 (discriminator 19))
[ 1256.168283][    C1]  </IRQ>
[ 1256.168284][    C1]  <TASK>
[ 1256.168285][    C1]  __local_bh_enable_ip (kernel/softirq.c:473)
[ 1256.168288][    C1]  __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))
[ 1256.168290][    C1]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[ 1256.168294][    C1]  ? netdev_core_pick_tx (net/core/dev.c:4784)
[ 1256.168297][    C1]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:124 (discriminator 1) kernel/locking/lockdep.c:5884 (discriminator 1))
[ 1256.168299][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[ 1256.168301][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[ 1256.168303][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[ 1256.168305][    C1]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[ 1256.168308][    C1]  ? __asan_memcpy (mm/kasan/shadow.c:106 (discriminator 1))
[ 1256.168310][    C1]  ? neigh_hh_output (./include/net/neighbour.h:525)
[ 1256.168313][    C1]  ip6_finish_output2 (./include/net/neighbour.h:558 net/ipv6/ip6_output.c:138)
[ 1256.168316][    C1]  ? ip6_dst_lookup (net/ipv6/ip6_output.c:1297)
[ 1256.168318][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[ 1256.168321][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[ 1256.168323][    C1]  ? 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))
[ 1256.168328][    C1]  ip6_finish_output (net/ipv6/ip6_output.c:210 net/ipv6/ip6_output.c:221)
[ 1256.168331][    C1]  ip6_output (./include/linux/netfilter.h:314 net/ipv6/ip6_output.c:248)
[ 1256.168334][    C1]  ? ip6_finish_output (./include/linux/skbuff.h:1165)
[ 1256.168337][    C1]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[ 1256.168339][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[ 1256.168342][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[ 1256.168346][    C1]  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))
[ 1256.168348][    C1]  ? mark_usage (kernel/locking/lockdep.c:4690)
[ 1256.168351][    C1]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[ 1256.168355][    C1]  ? ip6_autoflowlabel (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[ 1256.168358][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[ 1256.168360][    C1]  ? mark_usage (kernel/locking/lockdep.c:4690)
[ 1256.168363][    C1]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[ 1256.168366][    C1]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[ 1256.168368][    C1]  ? 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))
[ 1256.168371][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[ 1256.168373][    C1]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[ 1256.168376][    C1]  inet6_csk_xmit (net/ipv6/inet6_connection_sock.c:123 (discriminator 13))
[ 1256.168380][    C1]  __tcp_transmit_skb (net/ipv4/tcp_output.c:1716)
[ 1256.168385][    C1]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[ 1256.168388][    C1]  ? __tcp_select_window (./include/net/tcp.h:1755)
[ 1256.168391][    C1]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[ 1256.168393][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[ 1256.168398][    C1]  tcp_write_xmit (net/ipv4/tcp_output.c:1734 net/ipv4/tcp_output.c:3070)
[ 1256.168403][    C1]  ? tcp_retrans_try_collapse (./arch/x86/include/asm/atomic.h:23)
[ 1256.168406][    C1]  ? 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))
[ 1256.168409][    C1]  ? tcp_set_state (net/ipv4/tcp.c:3028)
[ 1256.168412][    C1]  __tcp_push_pending_frames (net/ipv4/tcp_output.c:3253 (discriminator 1))
[ 1256.168415][    C1]  __tcp_close (net/ipv4/tcp.c:3220)
[ 1256.168418][    C1]  tcp_close (net/ipv4/tcp.c:3311)
[ 1256.168420][    C1]  inet_release (net/ipv4/af_inet.c:442)
[ 1256.168424][    C1]  ? fcntl_setlk (fs/locks.c:2556)
[ 1256.168428][    C1]  __sock_release (net/socket.c:735)
[ 1256.168432][    C1]  sock_close (net/socket.c:1526 (discriminator 1))
[ 1256.168434][    C1]  __fput (fs/file_table.c:512)
[ 1256.168438][    C1]  fput_close_sync (fs/file_table.c:617)
[ 1256.168441][    C1]  ? alloc_file_clone (fs/file_table.c:479)
[ 1256.168443][    C1]  ? 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)
[ 1256.168446][    C1]  __x64_sys_close (fs/open.c:1560 fs/open.c:1545 fs/open.c:1545)
[ 1256.168449][    C1]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[ 1256.168452][    C1]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[ 1256.168455][    C1]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[ 1256.168457][    C1] RIP: 0033:0x7fecfbad854e
[ 1256.168462][    C1] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[ 1256.168464][    C1] RSP: 002b:00007ffe2a1cda40 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
[ 1256.168469][    C1] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 00007fecfbad854e
[ 1256.168471][    C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000011
[ 1256.168472][    C1] RBP: 00007ffe2a1cda50 R08: 0000000000000000 R09: 0000000000000000
[ 1256.168473][    C1] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000026bb


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