binder: 12779:12784 transaction failed 29189/-22, size 0-0 line 3014
binder: 12779:12784 ioctl c0306201 20000440 returned -14
binder: 12779:12784 transaction failed 29189/-22, size 0-0 line 3014
==================================================================
BUG: KASAN: use-after-free in selinux_socket_connect+0x48d/0x4b0 security/selinux/hooks.c:4232
Read of size 8 at addr ffff8801d72847f8 by task syz-executor5/12798

CPU: 1 PID: 12798 Comm: syz-executor5 Not tainted 4.4.145-g2241aa9 #78
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 e16f14bc1d892050 ffff8801c8fffb50 ffffffff81e123cd
 ffffea00075ca000 ffff8801d72847f8 0000000000000000 ffff8801d72847f8
 ffff8801c8fffe38 ffff8801c8fffb88 ffffffff81517d66 ffff8801d72847f8
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
 [<ffffffff81c72cad>] selinux_socket_connect+0x48d/0x4b0 security/selinux/hooks.c:4232
 [<ffffffff81c53313>] security_socket_connect+0x83/0xc0 security/security.c:1216
 [<ffffffff82f236e3>] SYSC_connect+0x103/0x300 net/socket.c:1553
 [<ffffffff82f260d4>] SyS_connect+0x24/0x30 net/socket.c:1538
 [<ffffffff838c84e5>] entry_SYSCALL_64_fastpath+0x22/0x9e

Allocated by task 12788:
 [<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
 [<ffffffff814f7624>] __kmalloc+0x124/0x310 mm/slub.c:3613
 [<ffffffff82f2a444>] kmalloc include/linux/slab.h:481 [inline]
 [<ffffffff82f2a444>] sk_prot_alloc+0x204/0x300 net/core/sock.c:1354
 [<ffffffff82f2fe1a>] sk_alloc+0x3a/0x3a0 net/core/sock.c:1419
 [<ffffffff835a9353>] pppol2tp_create+0x33/0x1f0 net/l2tp/l2tp_ppp.c:551
 [<ffffffff828f5f76>] pppox_create+0xf6/0x200 drivers/net/ppp/pppox.c:121
 [<ffffffff82f252a0>] __sock_create+0x2f0/0x5f0 net/socket.c:1177
 [<ffffffff82f257d0>] sock_create net/socket.c:1217 [inline]
 [<ffffffff82f257d0>] SYSC_socket net/socket.c:1247 [inline]
 [<ffffffff82f257d0>] SyS_socket+0xf0/0x1b0 net/socket.c:1227
 [<ffffffff838c84e5>] entry_SYSCALL_64_fastpath+0x22/0x9e

Freed by task 12784:
 [<ffffffff81034676>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fac23>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fb552>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fb552>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f8a54>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f8a54>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f8a54>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f8a54>] kfree+0xf4/0x310 mm/slub.c:3749
 [<ffffffff82f342d7>] sk_prot_free net/core/sock.c:1391 [inline]
 [<ffffffff82f342d7>] sk_destruct+0x407/0x4c0 net/core/sock.c:1472
 [<ffffffff82f343df>] __sk_free+0x4f/0x220 net/core/sock.c:1480
 [<ffffffff82f345e0>] sk_free+0x30/0x40 net/core/sock.c:1491
 [<ffffffff835ac90f>] sock_put include/net/sock.h:1639 [inline]
 [<ffffffff835ac90f>] pppol2tp_session_sock_put+0x5f/0x70 net/l2tp/l2tp_ppp.c:286
 [<ffffffff835a518c>] l2tp_tunnel_closeall+0x23c/0x350 net/l2tp/l2tp_core.c:1277
 [<ffffffff835a5d1b>] l2tp_udp_encap_destroy+0x8b/0xf0 net/l2tp/l2tp_core.c:1300
 [<ffffffff832d1528>] udp_destroy_sock+0x118/0x1a0 net/ipv4/udp.c:2056
 [<ffffffff82f3465d>] sk_common_release+0x6d/0x300 net/core/sock.c:2680
 [<ffffffff832cf535>] udp_lib_close+0x15/0x20 include/net/udp.h:190
 [<ffffffff832fe2cf>] inet_release+0xff/0x1d0 net/ipv4/af_inet.c:435
 [<ffffffff82f1ed76>] sock_release+0x96/0x1c0 net/socket.c:586
 [<ffffffff82f1eeb6>] sock_close+0x16/0x20 net/socket.c:1037
 [<ffffffff81525155>] __fput+0x235/0x6f0 fs/file_table.c:208
 [<ffffffff81525695>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff8118e00f>] task_work_run+0x10f/0x190 kernel/task_work.c:115
 [<ffffffff8100362d>] tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 [<ffffffff8100362d>] exit_to_usermode_loop+0x13d/0x160 arch/x86/entry/common.c:253
 [<ffffffff81006535>] prepare_exit_to_usermode arch/x86/entry/common.c:284 [inline]
 [<ffffffff81006535>] syscall_return_slowpath+0x1b5/0x1f0 arch/x86/entry/common.c:349
 [<ffffffff838c8675>] int_ret_from_sys_call+0x25/0xa3

The buggy address belongs to the object at ffff8801d7284400
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 1016 bytes inside of
 2048-byte region [ffff8801d7284400, ffff8801d7284c00)
The buggy address belongs to the page:
kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
BUG: unable to handle kernel paging request at ffff8801d7284400
IP: [<ffff8801d7284400>] 0xffff8801d7284400
PGD 6330067 PUD 80000001c00001e3 
Oops: 0011 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 12784 Comm: syz-executor5 Not tainted 4.4.145-g2241aa9 #78
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800a1156000 task.stack: ffff8801d69c8000
RIP: 0010:[<ffff8801d7284400>]  [<ffff8801d7284400>] 0xffff8801d7284400
RSP: 0018:ffff8801db207e60  EFLAGS: 00010246
RAX: 0000000000000001 RBX: ffff8801c6572358 RCX: 0000000000000000
RDX: ffff8801d7284400 RSI: 0000000000000000 RDI: ffff8801c6572358
RBP: ffff8801db207ee8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: ffff8801d7284400 R12: ffffffff83aaad60
R13: 0000000000000008 R14: dffffc0000000000 R15: ffff8801c6572360
FS:  00007fdee57b4700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8801d7284400 CR3: 00000000b5500000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff81287fb7 ffffffff812880a2 fffffbfff0748adc ffff8801db2201c0
 ffffffff844bff80 ffff8801db220280 ffff8801d8295600 0000000000000008
 000000000000000a ffff8801d7284400 ffff8801db2201f8 ffff8801db220200
Call Trace:
 <IRQ> 
 [<ffffffff838cb9fc>] __do_softirq+0x22c/0xa1a kernel/softirq.c:273
 [<ffffffff81141a8d>] invoke_softirq kernel/softirq.c:350 [inline]
 [<ffffffff81141a8d>] irq_exit+0x10d/0x140 kernel/softirq.c:391
 [<ffffffff838cb161>] exiting_irq arch/x86/include/asm/apic.h:652 [inline]
 [<ffffffff838cb161>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:926
 [<ffffffff838ca0a0>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:741
 <EOI> 
 [<ffffffff8125f7de>] vprintk_emit+0x51e/0x840 kernel/printk/printk.c:1832
 [<ffffffff8125fb28>] vprintk+0x28/0x30 kernel/printk/printk.c:1843
 [<ffffffff8125fb4d>] vprintk_default+0x1d/0x30 kernel/printk/printk.c:1844
 [<ffffffff81417618>] printk+0xaf/0xd7 kernel/printk/printk.c:1922
 [<ffffffff82dd3cab>] binder_transaction.cold.77+0x129b/0x1a02 drivers/android/binder.c:3431
 [<ffffffff82d7f58a>] binder_thread_write+0x66a/0x2250 drivers/android/binder.c:3700
 [<ffffffff82d8133d>] binder_ioctl_write_read.isra.43+0x1cd/0x930 drivers/android/binder.c:4629
 [<ffffffff82d82294>] binder_ioctl+0x7f4/0x1210 drivers/android/binder.c:4768
 [<ffffffff8155bfdf>] vfs_ioctl fs/ioctl.c:43 [inline]
 [<ffffffff8155bfdf>] file_ioctl fs/ioctl.c:470 [inline]
 [<ffffffff8155bfdf>] do_vfs_ioctl+0x63f/0xf40 fs/ioctl.c:605
 [<ffffffff8155c96f>] SYSC_ioctl fs/ioctl.c:622 [inline]
 [<ffffffff8155c96f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:613
 [<ffffffff838c84e5>] entry_SYSCALL_64_fastpath+0x22/0x9e
Code: 5f 74 6f 5f 62 6f 6e 64 00 00 00 08 00 0d 00 e8 03 00 00 05 00 10 00 03 00 00 00 05 00 11 00 00 00 00 00 08 00 04 00 dc 05 00 00 <80> 2c 0d ad 00 88 ff ff 00 00 00 00 00 00 00 00 18 00 01 40 00 
RIP  [<ffff8801d7284400>] 0xffff8801d7284400
 RSP <ffff8801db207e60>
CR2: ffff8801d7284400
---[ end trace ed9a6b3d6f82f3e6 ]---