IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
==================================================================
BUG: KASAN: slab-out-of-bounds in ip6_dst_idev include/net/ip6_fib.h:141 [inline]
BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x177c/0x1a00 net/ipv6/ip6_output.c:237
Read of size 8 at addr ffff8801d2ca8f18 by task syz-executor7/8742

CPU: 1 PID: 8742 Comm: syz-executor7 Not tainted 4.4.145-g2241aa9 #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 e5b65ae149c9eb3c ffff8800adb8f548 ffffffff81e123cd
 ffffea00074b2a00 ffff8801d2ca8f18 0000000000000000 ffff8801d2ca8f18
 0000000000001200 ffff8800adb8f580 ffffffff81517d66 ffff8801d2ca8f18
Call Trace:
 [<ffffffff81e123cd>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81e123cd>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81517d66>] print_address_description+0x6c/0x216 mm/kasan/report.c:252
 [<ffffffff81518085>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff81518085>] kasan_report.cold.7+0x175/0x2f7 mm/kasan/report.c:408
 [<ffffffff814fbb74>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff8343200c>] ip6_dst_idev include/net/ip6_fib.h:141 [inline]
 [<ffffffff8343200c>] ip6_xmit+0x177c/0x1a00 net/ipv6/ip6_output.c:237
 [<ffffffff834f2055>] inet6_csk_xmit+0x245/0x490 net/ipv6/inet6_connection_sock.c:176
 [<ffffffff835a169b>] l2tp_xmit_core net/l2tp/l2tp_core.c:1084 [inline]
 [<ffffffff835a169b>] l2tp_xmit_skb+0xbeb/0xeb0 net/l2tp/l2tp_core.c:1179
 [<ffffffff835adbd0>] pppol2tp_sendmsg+0x4e0/0x7d0 net/l2tp/l2tp_ppp.c:355
 [<ffffffff82f22e1c>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f22e1c>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f245e1>] ___sys_sendmsg+0x441/0x880 net/socket.c:1962
 [<ffffffff82f26c64>] __sys_sendmmsg+0x1d4/0x2e0 net/socket.c:2040
 [<ffffffff83010662>] C_SYSC_sendmmsg net/compat.c:728 [inline]
 [<ffffffff83010662>] compat_SyS_sendmmsg+0x32/0x40 net/compat.c:725
 [<ffffffff81006d94>] do_syscall_32_irqs_on arch/x86/entry/common.c:393 [inline]
 [<ffffffff81006d94>] do_fast_syscall_32+0x324/0x8b0 arch/x86/entry/common.c:460
 [<ffffffff838c9e43>] sysenter_flags_fixed+0xd/0x1a

Allocated by task 6724:
 [<ffffffff81034676>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fac23>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814faf07>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814faf07>] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814fb4d2>] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:554
 [<ffffffff814f6fce>] slab_post_alloc_hook mm/slub.c:1349 [inline]
 [<ffffffff814f6fce>] slab_alloc_node mm/slub.c:2615 [inline]
 [<ffffffff814f6fce>] slab_alloc mm/slub.c:2623 [inline]
 [<ffffffff814f6fce>] kmem_cache_alloc+0xbe/0x2a0 mm/slub.c:2628
 [<ffffffff82fa1375>] dst_alloc+0xb5/0x1a0 net/core/dst.c:210
 [<ffffffff831ee4c8>] rt_dst_alloc+0x78/0x430 net/ipv4/route.c:1478
 [<ffffffff831f798c>] __mkroute_output net/ipv4/route.c:2132 [inline]
 [<ffffffff831f798c>] __ip_route_output_key_hash+0x9ac/0x2380 net/ipv4/route.c:2344
 [<ffffffff831f9e39>] __ip_route_output_key include/net/route.h:124 [inline]
 [<ffffffff831f9e39>] ip_route_output_flow+0x29/0xa0 net/ipv4/route.c:2431
 [<ffffffff832c3dc3>] ip_route_connect include/net/route.h:304 [inline]
 [<ffffffff832c3dc3>] __ip4_datagram_connect+0x663/0xfe0 net/ipv4/datagram.c:51
 [<ffffffff834e2fb5>] __ip6_datagram_connect+0x5b5/0x1960 net/ipv6/datagram.c:59
 [<ffffffff834e438f>] ip6_datagram_connect+0x2f/0x50 net/ipv6/datagram.c:223
 [<ffffffff832feed7>] inet_dgram_connect+0x117/0x200 net/ipv4/af_inet.c:550
 [<ffffffff82f23798>] SYSC_connect+0x1b8/0x300 net/socket.c:1557
 [<ffffffff82f260d4>] SyS_connect+0x24/0x30 net/socket.c:1538
 [<ffffffff81006d94>] do_syscall_32_irqs_on arch/x86/entry/common.c:393 [inline]
 [<ffffffff81006d94>] do_fast_syscall_32+0x324/0x8b0 arch/x86/entry/common.c:460
 [<ffffffff838c9e43>] sysenter_flags_fixed+0xd/0x1a

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8801d2ca8dc0
 which belongs to the cache ip_dst_cache of size 208
The buggy address is located 136 bytes to the right of
 208-byte region [ffff8801d2ca8dc0, ffff8801d2ca8e90)
The buggy address belongs to the page:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.145-g2241aa9 #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffffffff84417840 task.stack: ffffffff84400000
RIP: 0010:[<ffffffff810e96a6>]  [<ffffffff810e96a6>] write_cr3 arch/x86/include/asm/paravirt.h:86 [inline]
RIP: 0010:[<ffffffff810e96a6>]  [<ffffffff810e96a6>] load_new_mm_cr3+0x56/0xa0 arch/x86/mm/tlb.c:68
RSP: 0018:ffffffff84407d20  EFLAGS: 00010046
RAX: 0000000000000000 RBX: 00006200074b2a00 RCX: 0000000000000049
RDX: 0000000000000000 RSI: ffffffff81e71efb RDI: 00006200074b2a00
RBP: ffffffff84407d28 R08: ffffffff83a456e0 R09: ffffffff84a16c38
R10: dffffc0000000000 R11: ffffffff84417840 R12: ffff8800b1e4f700
R13: 0000000000000000 R14: ffff8800ad56ad00 R15: 0000000000000c84
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f7726db0 CR3: 00000000bb085000 CR4: 00000000001606f0
Stack:
 ffff8800ad56ad00 ffffffff84407d70 ffffffff810ea3a8 ffff8801db21fe68
 ffffffff83a456e0 ffff8801db21f540 ffff8800b1e4f700 ffff8800ad56ad00
 ffffffff84417ce0 ffffffff83a456e0 ffffffff84407df8 ffffffff838b8c3a
Call Trace:
 [<ffffffff810ea3a8>] switch_mm_irqs_off+0x148/0xd20 arch/x86/mm/tlb.c:172
 [<ffffffff838b8c3a>] context_switch kernel/sched/core.c:2788 [inline]
 [<ffffffff838b8c3a>] __schedule+0x6fa/0x1d70 kernel/sched/core.c:3326
 [<ffffffff838ba4aa>] schedule+0x7a/0x1b0 kernel/sched/core.c:3355
 [<ffffffff838bac43>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3388
 [<ffffffff8121e252>] cpu_idle_loop kernel/sched/idle.c:279 [inline]
 [<ffffffff8121e252>] cpu_startup_entry+0x2c2/0x780 kernel/sched/idle.c:301
 [<ffffffff838b5611>] rest_init+0x188/0x18e init/main.c:410
 [<ffffffff84a4d8a1>] start_kernel+0x6b3/0x6e7 init/main.c:682
 [<ffffffff84a4c30f>] x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:196
 [<ffffffff84a4c450>] x86_64_start_kernel+0x13f/0x162 arch/x86/kernel/head64.c:185
Code: a1 84 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 1e 8b 05 71 d5 92 03 85 c0 75 0d 48 89 df <0f> 22 df 0f 1f 40 00 5b 5d c3 e8 9b 4f 00 00 eb ec e8 84 24 41 
RIP  [<ffffffff810e96a6>] write_cr3 arch/x86/include/asm/paravirt.h:86 [inline]
RIP  [<ffffffff810e96a6>] load_new_mm_cr3+0x56/0xa0 arch/x86/mm/tlb.c:68
 RSP <ffffffff84407d20>
---[ end trace 5ec7f89f6897b67d ]---