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BUG: KASAN: slab-out-of-bounds in decode_session6 net/xfrm/xfrm_policy.c:3390 [inline]
BUG: KASAN: slab-out-of-bounds in __xfrm_decode_session+0x1cfb/0x2e90 net/xfrm/xfrm_policy.c:3482
Read of size 1 at addr ffff888090f7e854 by task swapper/1/0

CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc1+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374
 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506
 kasan_report+0x12/0x20 mm/kasan/common.c:634
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/generic_report.c:129
 decode_session6 net/xfrm/xfrm_policy.c:3390 [inline]
 __xfrm_decode_session+0x1cfb/0x2e90 net/xfrm/xfrm_policy.c:3482
 xfrm_decode_session include/net/xfrm.h:1137 [inline]
 vti6_tnl_xmit+0x600/0x1c00 net/ipv6/ip6_vti.c:539
 __netdev_start_xmit include/linux/netdevice.h:4420 [inline]
 netdev_start_xmit include/linux/netdevice.h:4434 [inline]
 xmit_one net/core/dev.c:3280 [inline]
 dev_hard_start_xmit+0x1a3/0x9b0 net/core/dev.c:3296
 sch_direct_xmit+0x372/0xc30 net/sched/sch_generic.c:313
 qdisc_restart net/sched/sch_generic.c:376 [inline]
 __qdisc_run+0x577/0x1a00 net/sched/sch_generic.c:384
 __dev_xmit_skb net/core/dev.c:3537 [inline]
 __dev_queue_xmit+0x169d/0x3720 net/core/dev.c:3842
 dev_queue_xmit+0x18/0x20 net/core/dev.c:3906
 neigh_direct_output+0x16/0x20 net/core/neighbour.c:1530
 neigh_output include/net/neighbour.h:511 [inline]
 ip6_finish_output2+0x1034/0x2550 net/ipv6/ip6_output.c:116
 __ip6_finish_output+0x444/0xaa0 net/ipv6/ip6_output.c:142
 ip6_finish_output+0x38/0x1f0 net/ipv6/ip6_output.c:152
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip6_output+0x235/0x7f0 net/ipv6/ip6_output.c:175
 dst_output include/net/dst.h:436 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ndisc_send_skb+0xf29/0x14a0 net/ipv6/ndisc.c:505
 ndisc_send_rs+0x134/0x6d0 net/ipv6/ndisc.c:699
 addrconf_rs_timer+0x30f/0x680 net/ipv6/addrconf.c:3879
 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers kernel/time/timer.c:1773 [inline]
 __run_timers kernel/time/timer.c:1740 [inline]
 run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786
 __do_softirq+0x262/0x98c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x19b/0x1e0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61
Code: 08 73 67 fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d a4 76 61 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 94 76 61 00 fb f4 <c3> 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 ce e3 19 fa e8 69
RSP: 0018:ffff8880a98efd68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11e6387 RBX: ffff8880a98e0340 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a98e0bd4
RBP: ffff8880a98efd98 R08: ffff8880a98e0340 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffffff89c5b4c0 R14: 0000000000000000 R15: 0000000000000001
 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:571
 default_idle_call+0x84/0xb0 kernel/sched/idle.c:94
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x3b7/0x6e0 kernel/sched/idle.c:263
 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:355
 start_secondary+0x2f4/0x410 arch/x86/kernel/smpboot.c:264
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241

Allocated by task 8247:
 save_stack+0x23/0x90 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc mm/kasan/common.c:510 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:483
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:524
 kmem_cache_alloc_trace+0x158/0x790 mm/slab.c:3550
 kmalloc include/linux/slab.h:552 [inline]
 kzalloc include/linux/slab.h:686 [inline]
 dropmon_net_event+0x28f/0x480 net/core/drop_monitor.c:1480
 notifier_call_chain+0xc2/0x230 kernel/notifier.c:95
 __raw_notifier_call_chain kernel/notifier.c:396 [inline]
 raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:403
 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1749
 call_netdevice_notifiers_extack net/core/dev.c:1761 [inline]
 call_netdevice_notifiers net/core/dev.c:1775 [inline]
 register_netdevice+0xa5c/0x1000 net/core/dev.c:8810
 __rtnl_newlink+0x146b/0x16c0 net/core/rtnetlink.c:3208
 rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3254
 rtnetlink_rcv_msg+0x463/0xb00 net/core/rtnetlink.c:5223
 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477
 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5241
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x531/0x710 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x8a5/0xd60 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:657
 __sys_sendto+0x262/0x380 net/socket.c:1952
 __do_sys_sendto net/socket.c:1964 [inline]
 __se_sys_sendto net/socket.c:1960 [inline]
 __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1960
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 3892:
 save_stack+0x23/0x90 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 kasan_set_free_info mm/kasan/common.c:332 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/common.c:471
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:480
 __cache_free mm/slab.c:3425 [inline]
 kfree+0x10a/0x2c0 mm/slab.c:3756
 tomoyo_check_open_permission+0x19e/0x3f0 security/tomoyo/file.c:786
 tomoyo_file_open security/tomoyo/tomoyo.c:319 [inline]
 tomoyo_file_open+0xa9/0xd0 security/tomoyo/tomoyo.c:314
 security_file_open+0x71/0x300 security/security.c:1497
 do_dentry_open+0x373/0x1250 fs/open.c:784
 vfs_open+0xa0/0xd0 fs/open.c:914
 do_last fs/namei.c:3408 [inline]
 path_openat+0x10e9/0x46d0 fs/namei.c:3525
 do_filp_open+0x1a1/0x280 fs/namei.c:3555
 do_sys_open+0x3fe/0x5d0 fs/open.c:1097
 __do_sys_open fs/open.c:1115 [inline]
 __se_sys_open fs/open.c:1110 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1110
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff888090f7e800
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 20 bytes to the right of
 64-byte region [ffff888090f7e800, ffff888090f7e840)
The buggy address belongs to the page:
page:ffffea000243df80 refcount:1 mapcount:0 mapping:ffff8880aa400380 index:0x0
flags: 0x1fffc0000000200(slab)
raw: 01fffc0000000200 ffffea0002512388 ffffea0002596848 ffff8880aa400380
raw: 0000000000000000 ffff888090f7e000 0000000100000020 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888090f7e700: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888090f7e780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff888090f7e800: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
                                                 ^
 ffff888090f7e880: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888090f7e900: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
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