======================================
| xx__-> [  202.996308][ T2937] ==================================================================
| [  202.996574][ T2937] 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)
| [  202.996776][ T2937] Read of size 8 at addr ff1100000fcd0570 by task packetdrill/2937
| [  202.996977][ T2937]
[  202.997048][ T2937] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  202.997050][ T2937] Call Trace:
[  202.997051][ T2937]  <TASK>
[  202.997052][ T2937]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  202.997058][ T2937]  print_address_description.constprop.0 (mm/kasan/report.c:378)
[  202.997062][ T2937]  print_report (mm/kasan/report.c:482)
[  202.997064][ T2937]  ? __virt_addr_valid (./include/linux/rcupdate.h:948 ./include/linux/mmzone.h:2276 arch/x86/mm/physaddr.c:54)
[  202.997067][ T2937]  ? __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))
[  202.997069][ T2937]  kasan_report (mm/kasan/report.c:595)
[  202.997071][ T2937]  ? 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)
[  202.997073][ T2937]  ? 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)
[  202.997076][ T2937]  kasan_check_range (mm/kasan/generic.c:186 mm/kasan/generic.c:200)
[  202.997078][ T2937]  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)
[  202.997079][ T2937]  ? __mod_timer (kernel/time/timer.c:803 kernel/time/timer.c:848 kernel/time/timer.c:1025)
[  202.997083][ T2937]  ? __xfrm_policy_check2.constprop.0 (net/ipv4/ip_input.c:414 (discriminator 5))
[  202.997085][ T2937]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[  202.997089][ T2937]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[  202.997090][ T2937]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[  202.997093][ T2937]  tcp_v6_rcv (net/ipv6/tcp_ipv6.c:1149 net/ipv6/tcp_ipv6.c:1201 net/ipv6/tcp_ipv6.c:1993)
[  202.997097][ T2937]  ? tcp_v6_syn_recv_sock (./include/linux/skbuff.h:1141 ./include/net/sock.h:1602 ./include/net/sock.h:2498 net/ipv6/tcp_ipv6.c:1526)
[  202.997099][ T2937]  ? mark_usage (kernel/locking/lockdep.c:4690)
[  202.997102][ T2937]  ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:479)
[  202.997106][ T2937]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[  202.997108][ T2937]  ip6_input (net/ipv6/ip6_input.c:534 ./include/linux/netfilter.h:429 net/ipv6/ip6_input.c:545)
[  202.997110][ T2937]  __netif_receive_skb_one_core (net/core/dev.c:6264)
[  202.997113][ T2937]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[  202.997115][ T2937]  ? netif_receive_skb_internal (./include/linux/rcupdate.h:309 (discriminator 2) ./include/linux/rcupdate.h:849 (discriminator 2) net/core/dev.c:6450 (discriminator 2))
[  202.997117][ T2937]  ? __netif_receive_skb_list_core (net/core/dev.c:6310)
[  202.997119][ T2937]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[  202.997120][ T2937]  ? ktime_get_with_offset (./include/linux/seqlock.h:75 (discriminator 6) kernel/time/timekeeping.c:1046 (discriminator 6))
[  202.997123][ T2937]  netif_receive_skb_internal (net/core/dev.c:6463)
[  202.997125][ T2937]  ? __netif_receive_skb (./include/linux/skbuff.h:1141)
[  202.997127][ T2937]  ? __might_fault (mm/memory.c:7482 (discriminator 5))
[  202.997130][ T2937]  ? _copy_from_iter (./include/linux/instrumented.h:146 lib/iov_iter.c:66 ./include/linux/iov_iter.h:52 ./include/linux/iov_iter.h:304 ./include/linux/iov_iter.h:330 lib/iov_iter.c:261 lib/iov_iter.c:272)
[  202.997135][ T2937]  netif_receive_skb (net/core/dev.c:6522)
[  202.997137][ T2937]  ? __local_bh_disable_ip (./include/linux/ftrace.h:1177 kernel/softirq.c:418)
[  202.997140][ T2937]  tun_rx_batched.isra.0 (drivers/net/tun.c:1595)
[  202.997143][ T2937]  ? mark_usage (kernel/locking/lockdep.c:4690)
[  202.997144][ T2937]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[  202.997146][ T2937]  ? tun_setup (drivers/net/tun.c:2410)
[  202.997149][ T2937]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[  202.997150][ T2937]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[  202.997152][ T2937]  tun_get_user (drivers/net/tun.c:2045)
[  202.997155][ T2937]  ? do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[  202.997158][ T2937]  ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  202.997160][ T2937]  ? tun_build_skb (./arch/x86/include/asm/atomic.h:23)
[  202.997162][ T2937]  ? mark_usage (kernel/locking/lockdep.c:4690)
[  202.997163][ T2937]  ? ref_tracker_free (./include/linux/instrumented.h:112 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:455 ./include/linux/refcount.h:476 lib/ref_tracker.c:298)
[  202.997166][ T2937]  ? ref_tracker_dir_print (lib/ref_tracker.c:200)
[  202.997169][ T2937]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[  202.997171][ T2937]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[  202.997173][ T2937]  ? tun_get (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) drivers/net/tun.c:831 (discriminator 2))
[  202.997175][ T2937]  tun_chr_write_iter (drivers/net/tun.c:2091)
[  202.997177][ T2937]  do_iter_readv_writev (fs/read_write.c:828)
[  202.997179][ T2937]  ? kasan_quarantine_put (mm/kasan/quarantine.c:234 (discriminator 6))
[  202.997180][ T2937]  ? fsnotify (fs/notify/fsnotify.c:548 (discriminator 3))
[  202.997183][ T2937]  ? ref_tracker_free (./include/linux/instrumented.h:112 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:455 ./include/linux/refcount.h:476 lib/ref_tracker.c:298)
[  202.997185][ T2937]  ? new_sync_write (./include/linux/ioprio.h:41)
[  202.997188][ T2937]  ? import_iovec (lib/iov_iter.c:1440 (discriminator 1))
[  202.997190][ T2937]  vfs_writev (fs/read_write.c:1058)
[  202.997191][ T2937]  ? tun_get (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) drivers/net/tun.c:831 (discriminator 2))
[  202.997193][ T2937]  ? vfs_iocb_iter_write (fs/read_write.c:41)
[  202.997194][ T2937]  ? tun_recvmsg (./include/linux/netdevice.h:4505 (discriminator 31))
[  202.997196][ T2937]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[  202.997198][ T2937]  ? new_sync_read (./include/linux/fs.h:2185 (discriminator 1) fs/read_write.c:489 (discriminator 1))
[  202.997200][ T2937]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[  202.997202][ T2937]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[  202.997204][ T2937]  ? __fget_files (./include/linux/rcupdate.h:882 fs/file.c:1100)
[  202.997207][ T2937]  ? do_writev (fs/read_write.c:1104)
[  202.997209][ T2937]  do_writev (fs/read_write.c:1104)
[  202.997210][ T2937]  ? vfs_writev (fs/read_write.c:41)
[  202.997211][ T2937]  ? fput (./include/linux/preempt.h:500 ./include/linux/file_ref.h:150 fs/file_table.c:588)
[  202.997213][ T2937]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[  202.997215][ T2937]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[  202.997217][ T2937]  ? irq_exit_rcu (kernel/softirq.c:786)
[  202.997219][ T2937]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  202.997220][ T2937] RIP: 0033:0x4c42a2
[  202.997223][ T2937] Code: 08 0f 85 31 ea 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 48 89 e5
All code
========
   0:	08 0f                	or     %cl,(%rdi)
   2:	85 31                	test   %esi,(%rcx)
   4:	ea                   	(bad)
   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:	48 89 e5             	mov    %rsp,%rbp

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:	48 89 e5             	mov    %rsp,%rbp
[  202.997225][ T2937] RSP: 002b:00007ffe5fd659c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[  202.997230][ T2937] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 00000000004c42a2
[  202.997231][ T2937] RDX: 0000000000000002 RSI: 00007ffe5fd65a50 RDI: 0000000000000005
[  202.997232][ T2937] RBP: 00007ffe5fd659f0 R08: 0000000000000000 R09: 0000000000000000
[  202.997233][ T2937] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe5fd66028


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