binder: release 6624:6633 transaction 6 out, still active
l2tp_core: tunl 4: fd 19 wrong protocol, got 1, expected 17
binder: undelivered TRANSACTION_COMPLETE
binder: send failed reply for transaction 6, target dead
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x387e/0x4b50 kernel/locking/lockdep.c:3092
Read of size 8 at addr ffff8801d75944a0 by task syz-executor2/6659

CPU: 1 PID: 6659 Comm: syz-executor2 Not tainted 4.4.119-g855ea74 #28
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 a38c51d4856668ec ffff8800b44b7620 ffffffff81d0402d
 ffffea00075d6400 ffff8801d75944a0 0000000000000000 ffff8801d75944a0
 0000000000000000 ffff8800b44b7658 ffffffff814fe103 ffff8801d75944a0
Call Trace:
 [<ffffffff81d0402d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0402d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fe103>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fe615>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fe615>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fe774>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff8123ac8e>] __lock_acquire+0x387e/0x4b50 kernel/locking/lockdep.c:3092
 [<ffffffff8123d7ce>] lock_acquire+0x15e/0x460 kernel/locking/lockdep.c:3592
 [<ffffffff8377290a>] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:137 [inline]
 [<ffffffff8377290a>] _raw_spin_lock_bh+0x3a/0x50 kernel/locking/spinlock.c:175
 [<ffffffff82df4103>] spin_lock_bh include/linux/spinlock.h:307 [inline]
 [<ffffffff82df4103>] lock_sock_nested+0x43/0x120 net/core/sock.c:2451
 [<ffffffff83465c80>] lock_sock include/net/sock.h:1493 [inline]
 [<ffffffff83465c80>] pppol2tp_release+0x50/0x310 net/l2tp/l2tp_ppp.c:493
 [<ffffffff82de79fd>] sock_release+0x8d/0x1e0 net/socket.c:586
 [<ffffffff82de7b66>] sock_close+0x16/0x20 net/socket.c:1037
 [<ffffffff815235c3>] __fput+0x233/0x6d0 fs/file_table.c:208
 [<ffffffff81523ae5>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff8118b984>] task_work_run+0x104/0x180 kernel/task_work.c:115
 [<ffffffff81132f2a>] exit_task_work include/linux/task_work.h:21 [inline]
 [<ffffffff81132f2a>] do_exit+0x82a/0x2a10 kernel/exit.c:755
 [<ffffffff811393c8>] do_group_exit+0x108/0x320 kernel/exit.c:885
 [<ffffffff8115c822>] get_signal+0x4f2/0x1550 kernel/signal.c:2317
 [<ffffffff8100e7fb>] do_signal+0x8b/0x1d40 arch/x86/kernel/signal.c:712
 [<ffffffff810035fa>] exit_to_usermode_loop+0x11a/0x160 arch/x86/entry/common.c:248
 [<ffffffff81007084>] prepare_exit_to_usermode arch/x86/entry/common.c:283 [inline]
 [<ffffffff81007084>] syscall_return_slowpath arch/x86/entry/common.c:348 [inline]
 [<ffffffff81007084>] do_syscall_32_irqs_on arch/x86/entry/common.c:398 [inline]
 [<ffffffff81007084>] do_fast_syscall_32+0x614/0x8a0 arch/x86/entry/common.c:459
 [<ffffffff83774fea>] sysenter_flags_fixed+0xd/0x17

Allocated by task 6669:
 [<ffffffff81035d96>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fd173>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fd43d>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fd43d>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814f9724>] __kmalloc+0x124/0x320 mm/slub.c:3613
 [<ffffffff82df2f1c>] kmalloc include/linux/slab.h:481 [inline]
 [<ffffffff82df2f1c>] sk_prot_alloc+0x18c/0x310 net/core/sock.c:1354
 [<ffffffff82df923a>] sk_alloc+0x3a/0x3a0 net/core/sock.c:1419
 [<ffffffff83461a63>] pppol2tp_create+0x33/0x1f0 net/l2tp/l2tp_ppp.c:551
 [<ffffffff827fdce1>] pppox_create+0xf1/0x200 drivers/net/ppp/pppox.c:121
 [<ffffffff82dede6c>] __sock_create+0x3ac/0x640 net/socket.c:1177
 [<ffffffff82dee330>] sock_create net/socket.c:1217 [inline]
 [<ffffffff82dee330>] SYSC_socket net/socket.c:1247 [inline]
 [<ffffffff82dee330>] SyS_socket+0xf0/0x1b0 net/socket.c:1227
 [<ffffffff81006d91>] do_syscall_32_irqs_on arch/x86/entry/common.c:392 [inline]
 [<ffffffff81006d91>] do_fast_syscall_32+0x321/0x8a0 arch/x86/entry/common.c:459
 [<ffffffff83774fea>] sysenter_flags_fixed+0xd/0x17

Freed by task 6659:
 [<ffffffff81035d96>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fd173>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fda92>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fda92>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814fa52c>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814fa52c>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814fa52c>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814fa52c>] kfree+0xfc/0x300 mm/slub.c:3749
 [<ffffffff82dfce07>] sk_prot_free net/core/sock.c:1391 [inline]
 [<ffffffff82dfce07>] sk_destruct+0x3f7/0x4c0 net/core/sock.c:1472
 [<ffffffff82dfcf27>] __sk_free+0x57/0x230 net/core/sock.c:1480
 [<ffffffff82dfd130>] sk_free+0x30/0x40 net/core/sock.c:1491
 [<ffffffff8346506f>] sock_put include/net/sock.h:1639 [inline]
 [<ffffffff8346506f>] pppol2tp_session_sock_put+0x5f/0x70 net/l2tp/l2tp_ppp.c:286
 [<ffffffff8345da64>] l2tp_tunnel_closeall+0x254/0x3b0 net/l2tp/l2tp_core.c:1277
 [<ffffffff8345e64b>] l2tp_udp_encap_destroy+0x8b/0xf0 net/l2tp/l2tp_core.c:1300
 [<ffffffff8336ca41>] udpv6_destroy_sock+0xb1/0xd0 net/ipv6/udp.c:1421
 [<ffffffff82dfeafb>] sk_common_release+0x6b/0x300 net/core/sock.c:2680
 [<ffffffff8336b9f5>] udp_lib_close+0x15/0x20 include/net/udp.h:190
 [<ffffffff831cfbfa>] inet_release+0xfa/0x1d0 net/ipv4/af_inet.c:435
 [<ffffffff832f53c0>] inet6_release+0x50/0x70 net/ipv6/af_inet6.c:424
 [<ffffffff82de79fd>] sock_release+0x8d/0x1e0 net/socket.c:586
 [<ffffffff82de7b66>] sock_close+0x16/0x20 net/socket.c:1037
 [<ffffffff815235c3>] __fput+0x233/0x6d0 fs/file_table.c:208
 [<ffffffff81523ae5>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff8118b984>] task_work_run+0x104/0x180 kernel/task_work.c:115
 [<ffffffff8100361d>] tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 [<ffffffff8100361d>] exit_to_usermode_loop+0x13d/0x160 arch/x86/entry/common.c:252
 [<ffffffff81007084>] prepare_exit_to_usermode arch/x86/entry/common.c:283 [inline]
 [<ffffffff81007084>] syscall_return_slowpath arch/x86/entry/common.c:348 [inline]
 [<ffffffff81007084>] do_syscall_32_irqs_on arch/x86/entry/common.c:398 [inline]
 [<ffffffff81007084>] do_fast_syscall_32+0x614/0x8a0 arch/x86/entry/common.c:459
 [<ffffffff83774fea>] sysenter_flags_fixed+0xd/0x17

The buggy address belongs to the object at ffff8801d7594400
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 160 bytes inside of
 2048-byte region [ffff8801d7594400, ffff8801d7594c00)
The buggy address belongs to the page:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 160 Comm: kworker/u4:2 Not tainted 4.4.119-g855ea74 #28
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: binder binder_deferred_func
task: ffff8801d9208000 task.stack: ffff8801d9210000
RIP: 0010:[<ffffffff81d65fa6>]  [<ffffffff81d65fa6>] lookup_object lib/debugobjects.c:120 [inline]
RIP: 0010:[<ffffffff81d65fa6>]  [<ffffffff81d65fa6>] debug_object_deactivate+0x1a6/0x3c0 lib/debugobjects.c:465
RSP: 0018:ffff8801db207d20  EFLAGS: 00010003
RAX: 0000000000000092 RBX: 00000000f6fa609c RCX: ffff8801d3cc7b50
RDX: 000000001edf4c16 RSI: ffffffff842c35a0 RDI: 00000000f6fa60b4
RBP: ffff8801db207df0 R08: 1ffff10015e830ab R09: 0000000000000000
R10: ffffed0043fffa01 R11: 0000000000000001 R12: 1ffff1003b640fa8
R13: 00000000001427d9 R14: dffffc0000000000 R15: ffffffff85813588
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f6ed5db0 CR3: 000000000420c000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 ffffffff842c35a0 ffff8801d3cc7b50 0000000000000092
 0000000041b58ab3 ffffffff83fce929 ffffffff81d65e00 ffff8801c689fe08
 ffff8801db207db0 ffffffff81d21995 ffff8801db219c58 ffff8801db219710
Call Trace:
 <IRQ> 
 [<ffffffff812a2b86>] debug_timer_deactivate kernel/time/timer.c:618 [inline]
 [<ffffffff812a2b86>] debug_deactivate kernel/time/timer.c:670 [inline]
 [<ffffffff812a2b86>] detach_timer kernel/time/timer.c:716 [inline]
 [<ffffffff812a2b86>] detach_expired_timer kernel/time/timer.c:727 [inline]
 [<ffffffff812a2b86>] __run_timers kernel/time/timer.c:1253 [inline]
 [<ffffffff812a2b86>] run_timer_softirq+0x336/0xbb0 kernel/time/timer.c:1444
 [<ffffffff83776b57>] __do_softirq+0x227/0xa38 kernel/softirq.c:273
 [<ffffffff8113daa9>] invoke_softirq kernel/softirq.c:350 [inline]
 [<ffffffff8113daa9>] irq_exit+0x119/0x140 kernel/softirq.c:391
 [<ffffffff837762bb>] exiting_irq arch/x86/include/asm/apic.h:653 [inline]
 [<ffffffff837762bb>] smp_apic_timer_interrupt+0x7b/0xa0 arch/x86/kernel/apic/apic.c:926
 [<ffffffff83775210>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:737
 <EOI> 
 [<ffffffff8126a5ae>] vprintk_emit+0x55e/0x850 kernel/printk/printk.c:1832
 [<ffffffff8126a8c8>] vprintk+0x28/0x30 kernel/printk/printk.c:1843
 [<ffffffff8126a8ed>] vprintk_default+0x1d/0x30 kernel/printk/printk.c:1844
 [<ffffffff8141b73d>] printk+0xb7/0xe2 kernel/printk/printk.c:1922
 [<ffffffff82c7647b>] binder_send_failed_reply+0x25b/0x3a0 drivers/android/binder.c:2161
 [<ffffffff82c76692>] binder_cleanup_transaction+0xd2/0x140 drivers/android/binder.c:2189
 [<ffffffff82c76892>] binder_release_work+0x192/0x260 drivers/android/binder.c:4366
 [<ffffffff82c7bf6a>] binder_deferred_release drivers/android/binder.c:5143 [inline]
 [<ffffffff82c7bf6a>] binder_deferred_func+0x9aa/0xd10 drivers/android/binder.c:5177
 [<ffffffff8117fd37>] process_one_work+0x7d7/0x16e0 kernel/workqueue.c:2064
 [<ffffffff81180d19>] worker_thread+0xd9/0xfc0 kernel/workqueue.c:2196
 [<ffffffff81190788>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff83773a85>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:506
Code: eb 1a 48 89 da 48 c1 ea 03 42 80 3c 32 00 0f 85 86 01 00 00 48 8b 1b 48 85 db 74 7a 48 8d 7b 18 41 83 c5 01 48 89 fa 48 c1 ea 03 <42> 80 3c 32 00 0f 85 3c 01 00 00 48 3b 4b 18 75 c6 48 8d 7b 10 
RIP  [<ffffffff81d65fa6>] lookup_object lib/debugobjects.c:120 [inline]
RIP  [<ffffffff81d65fa6>] debug_object_deactivate+0x1a6/0x3c0 lib/debugobjects.c:465
 RSP <ffff8801db207d20>
---[ end trace 32d8449927fddd8c ]---