binder: 13288:13292 ERROR: BC_REGISTER_LOOPER called without request
==================================================================
BUG: KASAN: use-after-free in ip6_dst_idev include/net/ip6_fib.h:141 [inline]
BUG: KASAN: use-after-free in ip6_xmit+0x1776/0x1a00 net/ipv6/ip6_output.c:237
Read of size 8 at addr ffff8801d212cc98 by task syz-executor0/13296

CPU: 0 PID: 13296 Comm: syz-executor0 Not tainted 4.4.141-g1b37d68 #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 b6e6c4b1762254c9 ffff8800a12cf548 ffffffff81e0e18d
 ffffea0007484b00 ffff8801d212cc98 0000000000000000 ffff8801d212cc98
 0000000000001200 ffff8800a12cf580 ffffffff81515a86 ffff8801d212cc98
Call Trace:
 [<ffffffff81e0e18d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81e0e18d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81515a86>] print_address_description+0x6c/0x216 mm/kasan/report.c:252
 [<ffffffff81515da5>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff81515da5>] kasan_report.cold.7+0x175/0x2f7 mm/kasan/report.c:408
 [<ffffffff814f9894>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff8342caa6>] ip6_dst_idev include/net/ip6_fib.h:141 [inline]
 [<ffffffff8342caa6>] ip6_xmit+0x1776/0x1a00 net/ipv6/ip6_output.c:237
 [<ffffffff834ec925>] inet6_csk_xmit+0x245/0x490 net/ipv6/inet6_connection_sock.c:176
 [<ffffffff8359be1b>] l2tp_xmit_core net/l2tp/l2tp_core.c:1084 [inline]
 [<ffffffff8359be1b>] l2tp_xmit_skb+0xbeb/0xeb0 net/l2tp/l2tp_core.c:1179
 [<ffffffff835a8350>] pppol2tp_sendmsg+0x4e0/0x7d0 net/l2tp/l2tp_ppp.c:355
 [<ffffffff82f1e2fc>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1e2fc>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1fac1>] ___sys_sendmsg+0x441/0x880 net/socket.c:1962
 [<ffffffff82f22144>] __sys_sendmmsg+0x1d4/0x2e0 net/socket.c:2040
 [<ffffffff8300bc02>] C_SYSC_sendmmsg net/compat.c:728 [inline]
 [<ffffffff8300bc02>] compat_SyS_sendmmsg+0x32/0x40 net/compat.c:725
 [<ffffffff81006d96>] do_syscall_32_irqs_on arch/x86/entry/common.c:393 [inline]
 [<ffffffff81006d96>] do_fast_syscall_32+0x326/0x8b0 arch/x86/entry/common.c:460
 [<ffffffff838c456a>] sysenter_flags_fixed+0xd/0x17

Allocated by task 11716:
 [<ffffffff81033c86>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814f8943>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814f8c27>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814f8c27>] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814f91f2>] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:554
 [<ffffffff814f4cee>] slab_post_alloc_hook mm/slub.c:1349 [inline]
 [<ffffffff814f4cee>] slab_alloc_node mm/slub.c:2615 [inline]
 [<ffffffff814f4cee>] slab_alloc mm/slub.c:2623 [inline]
 [<ffffffff814f4cee>] kmem_cache_alloc+0xbe/0x2a0 mm/slub.c:2628
 [<ffffffff82f9c945>] dst_alloc+0xb5/0x1a0 net/core/dst.c:210
 [<ffffffff831e9a88>] rt_dst_alloc+0x78/0x430 net/ipv4/route.c:1478
 [<ffffffff831f2f4c>] __mkroute_output net/ipv4/route.c:2132 [inline]
 [<ffffffff831f2f4c>] __ip_route_output_key_hash+0x9ac/0x2380 net/ipv4/route.c:2344
 [<ffffffff831f53f9>] __ip_route_output_key include/net/route.h:124 [inline]
 [<ffffffff831f53f9>] ip_route_output_flow+0x29/0xa0 net/ipv4/route.c:2431
 [<ffffffff832d12b0>] udp_sendmsg+0x1480/0x1c70 net/ipv4/udp.c:1040
 [<ffffffff8349677d>] udpv6_sendmsg+0x12cd/0x24c0 net/ipv6/udp.c:1173
 [<ffffffff83301113>] inet_sendmsg+0x203/0x4d0 net/ipv4/af_inet.c:755
 [<ffffffff82f1e2fc>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1e2fc>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1fac1>] ___sys_sendmsg+0x441/0x880 net/socket.c:1962
 [<ffffffff82f22144>] __sys_sendmmsg+0x1d4/0x2e0 net/socket.c:2040
 [<ffffffff8300bc02>] C_SYSC_sendmmsg net/compat.c:728 [inline]
 [<ffffffff8300bc02>] compat_SyS_sendmmsg+0x32/0x40 net/compat.c:725
 [<ffffffff81006d96>] do_syscall_32_irqs_on arch/x86/entry/common.c:393 [inline]
 [<ffffffff81006d96>] do_fast_syscall_32+0x326/0x8b0 arch/x86/entry/common.c:460
 [<ffffffff838c456a>] sysenter_flags_fixed+0xd/0x17

Freed by task 5955:
 [<ffffffff81033c86>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814f8943>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814f9272>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814f9272>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f63fe>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f63fe>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f63fe>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f63fe>] kmem_cache_free+0xbe/0x340 mm/slub.c:2881
 [<ffffffff82f9bbf5>] dst_destroy.part.6+0x1f5/0x330 net/core/dst.c:270
 [<ffffffff82f9c275>] dst_destroy net/core/dst.c:252 [inline]
 [<ffffffff82f9c275>] dst_destroy_rcu+0x15/0x40 net/core/dst.c:295
 [<ffffffff81285d67>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff81285d67>] rcu_do_batch kernel/rcu/tree.c:2705 [inline]
 [<ffffffff81285d67>] invoke_rcu_callbacks kernel/rcu/tree.c:2973 [inline]
 [<ffffffff81285d67>] __rcu_process_callbacks kernel/rcu/tree.c:2940 [inline]
 [<ffffffff81285d67>] rcu_process_callbacks+0x927/0x1440 kernel/rcu/tree.c:2957
 [<ffffffff838c60ec>] __do_softirq+0x22c/0xa1a kernel/softirq.c:273

The buggy address belongs to the object at ffff8801d212cc80
 which belongs to the cache ip_dst_cache of size 208
The buggy address is located 24 bytes inside of
 208-byte region [ffff8801d212cc80, ffff8801d212cd50)
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: 1 PID: 3900 Comm: syz-executor0 Not tainted 4.4.141-g1b37d68 #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800abf9e000 task.stack: ffff8801d9048000
RIP: 0010:[<ffffffff811a613d>]  [<ffffffff811a613d>] task_curr kernel/sched/core.c:1025 [inline]
RIP: 0010:[<ffffffff811a613d>]  [<ffffffff811a613d>] kick_process+0xdd/0x1c0 kernel/sched/core.c:1567
RSP: 0018:ffff8801d904fa18  EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 000000000001f4c0 RCX: 0000000000000000
RDX: 00000000743ecc48 RSI: ffffffff81e6dcdb RDI: 00000003a1f66240
RBP: ffff8801d904fa38 R08: ffffffff8531ca50 R09: 0000000000000001
R10: 0000000000000000 R11: ffff8800abf9e000 R12: ffff8800b2730000
R13: 0000000083aaa220 R14: 0000000083aaa220 R15: ffff8800b57f9140
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000009fc04ae8 CR3: 000000000440c000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8800b2730000 0000000000000080 ffff8801d7151800 0000000000000100
 ffff8801d904fa58 ffffffff81155b3f ffff8800b2730000 dffffc0000000000
 ffff8801d904fab0 ffffffff811561bb ffff880100000000 0000000000000000
Call Trace:
 [<ffffffff81155b3f>] signal_wake_up_state+0x5f/0x70 kernel/signal.c:660
 [<ffffffff811561bb>] signal_wake_up include/linux/sched.h:3323 [inline]
 [<ffffffff811561bb>] complete_signal+0x62b/0x790 kernel/signal.c:942
 [<ffffffff81157705>] __send_signal+0x4d5/0x11b0 kernel/signal.c:1080
 [<ffffffff8115842a>] send_signal+0x4a/0xc0 kernel/signal.c:1096
 [<ffffffff8115ab14>] do_send_sig_info+0xa4/0x130 kernel/signal.c:1151
 [<ffffffff8115abd3>] send_sig_info+0x33/0x50 kernel/signal.c:1436
 [<ffffffff81326c0d>] zap_pid_ns_processes+0x28d/0x690 kernel/pid_namespace.c:223
 [<ffffffff81136511>] find_child_reaper kernel/exit.c:477 [inline]
 [<ffffffff81136511>] forget_original_parent kernel/exit.c:563 [inline]
 [<ffffffff81136511>] exit_notify kernel/exit.c:599 [inline]
 [<ffffffff81136511>] do_exit+0x1c21/0x26b0 kernel/exit.c:776
 [<ffffffff8113b211>] do_group_exit+0x111/0x330 kernel/exit.c:885
 [<ffffffff8113b44d>] SYSC_exit_group kernel/exit.c:896 [inline]
 [<ffffffff8113b44d>] SyS_exit_group+0x1d/0x20 kernel/exit.c:894
 [<ffffffff81006d96>] do_syscall_32_irqs_on arch/x86/entry/common.c:393 [inline]
 [<ffffffff81006d96>] do_fast_syscall_32+0x326/0x8b0 arch/x86/entry/common.c:460
 [<ffffffff838c456a>] sysenter_flags_fixed+0xd/0x17
Code: 04 02 84 c0 74 08 3c 03 0f 8e b4 00 00 00 48 b8 00 00 00 00 00 fc ff df 45 8b 6d 10 4a 8d 3c ed 40 51 a1 84 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ae 00 00 00 4a 03 1c ed 40 51 a1 84 48 b8 00 
RIP  [<ffffffff811a613d>] task_curr kernel/sched/core.c:1025 [inline]
RIP  [<ffffffff811a613d>] kick_process+0xdd/0x1c0 kernel/sched/core.c:1567
 RSP <ffff8801d904fa18>
---[ end trace 5c4bbd1e9510e03a ]---