IPVS: set_ctl: invalid protocol: 0 224.0.0.1:0 dh
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x387e/0x4b50 kernel/locking/lockdep.c:3092
Read of size 8 at addr ffff8800b314cd20 by task syz-executor7/7139

CPU: 1 PID: 7139 Comm: syz-executor7 Not tainted 4.4.125-g38f41ec #63
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 4429824135b6dd8d ffff8800b5ddf670 ffffffff81d067bd
 ffffea0002cc5200 ffff8800b314cd20 0000000000000000 ffff8800b314cd20
 0000000000000000 ffff8800b5ddf6a8 ffffffff814fea83 ffff8800b314cd20
Call Trace:
 [<ffffffff81d067bd>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d067bd>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fea83>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fef95>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fef95>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814ff0f4>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff8123b16e>] __lock_acquire+0x387e/0x4b50 kernel/locking/lockdep.c:3092
IPVS: set_ctl: invalid protocol: 0 224.0.0.1:0 dh
 [<ffffffff8123dcae>] lock_acquire+0x15e/0x460 kernel/locking/lockdep.c:3592
 [<ffffffff83778c2a>] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:137 [inline]
 [<ffffffff83778c2a>] _raw_spin_lock_bh+0x3a/0x50 kernel/locking/spinlock.c:175
 [<ffffffff82df9f03>] spin_lock_bh include/linux/spinlock.h:307 [inline]
 [<ffffffff82df9f03>] lock_sock_nested+0x43/0x120 net/core/sock.c:2451
 [<ffffffff8346bd60>] lock_sock include/net/sock.h:1493 [inline]
 [<ffffffff8346bd60>] pppol2tp_release+0x50/0x310 net/l2tp/l2tp_ppp.c:493
 [<ffffffff82ded7fd>] sock_release+0x8d/0x1e0 net/socket.c:586
 [<ffffffff82ded966>] sock_close+0x16/0x20 net/socket.c:1037
 [<ffffffff81523f43>] __fput+0x233/0x6d0 fs/file_table.c:208
 [<ffffffff81524465>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff8118bd44>] task_work_run+0x104/0x180 kernel/task_work.c:115
 [<ffffffff8113321a>] exit_task_work include/linux/task_work.h:21 [inline]
 [<ffffffff8113321a>] do_exit+0x82a/0x2a10 kernel/exit.c:759
 [<ffffffff811396b8>] do_group_exit+0x108/0x320 kernel/exit.c:889
 [<ffffffff8115cb22>] 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
 [<ffffffff81006535>] prepare_exit_to_usermode arch/x86/entry/common.c:283 [inline]
 [<ffffffff81006535>] syscall_return_slowpath+0x1b5/0x1f0 arch/x86/entry/common.c:348
 [<ffffffff83779af5>] int_ret_from_sys_call+0x25/0xa3

Allocated by task 7114:
 [<ffffffff81035d76>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fdaf3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fddbd>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fddbd>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814fa0a4>] __kmalloc+0x124/0x320 mm/slub.c:3613
 [<ffffffff82df8d1c>] kmalloc include/linux/slab.h:481 [inline]
 [<ffffffff82df8d1c>] sk_prot_alloc+0x18c/0x310 net/core/sock.c:1354
 [<ffffffff82dff03a>] sk_alloc+0x3a/0x3a0 net/core/sock.c:1419
 [<ffffffff83467b43>] pppol2tp_create+0x33/0x1f0 net/l2tp/l2tp_ppp.c:551
 [<ffffffff82800cc1>] pppox_create+0xf1/0x200 drivers/net/ppp/pppox.c:121
 [<ffffffff82df3c6c>] __sock_create+0x3ac/0x640 net/socket.c:1177
 [<ffffffff82df4130>] sock_create net/socket.c:1217 [inline]
 [<ffffffff82df4130>] SYSC_socket net/socket.c:1247 [inline]
 [<ffffffff82df4130>] SyS_socket+0xf0/0x1b0 net/socket.c:1227
 [<ffffffff83779965>] entry_SYSCALL_64_fastpath+0x22/0x9e

Freed by task 7114:
 [<ffffffff81035d76>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fdaf3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fe412>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fe412>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814faeac>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814faeac>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814faeac>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814faeac>] kfree+0xfc/0x300 mm/slub.c:3749
 [<ffffffff82e02c07>] sk_prot_free net/core/sock.c:1391 [inline]
 [<ffffffff82e02c07>] sk_destruct+0x3f7/0x4c0 net/core/sock.c:1472
 [<ffffffff82e02d27>] __sk_free+0x57/0x230 net/core/sock.c:1480
 [<ffffffff82e02f30>] sk_free+0x30/0x40 net/core/sock.c:1491
 [<ffffffff8346c536>] sock_put include/net/sock.h:1639 [inline]
 [<ffffffff8346c536>] pppol2tp_sendmsg+0x516/0x7f0 net/l2tp/l2tp_ppp.c:366
 [<ffffffff82df168a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82df168a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82df3261>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82df52b3>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82df539d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82df539d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83779965>] entry_SYSCALL_64_fastpath+0x22/0x9e

The buggy address belongs to the object at ffff8800b314cc80
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 160 bytes inside of
 2048-byte region [ffff8800b314cc80, ffff8800b314d480)
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 4.4.125-g38f41ec #63
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffffffff84217840 task.stack: ffffffff84200000
RIP: 0010:[<ffffffff81d68776>]  [<ffffffff81d68776>] lookup_object lib/debugobjects.c:120 [inline]
RIP: 0010:[<ffffffff81d68776>]  [<ffffffff81d68776>] debug_object_deactivate+0x1a6/0x3c0 lib/debugobjects.c:465
RSP: 0018:ffff8801db207d20  EFLAGS: 00010002
RAX: 0000000000000092 RBX: 4000000000004080 RCX: ffff8800ba67fdf8
RDX: 0800000000000813 RSI: ffffffff842c6460 RDI: 4000000000004098
RBP: ffff8801db207de8 R08: 1ffff10016a70fa0 R09: ffffffff8510de30
R10: 0000000000000001 R11: 1ffff1003b640f6a R12: 1ffff1003b640fa8
R13: 0000000000000003 R14: dffffc0000000000 R15: ffffffff8582d948
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f69e1fa0db8 CR3: 00000001a34c8000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 0000000000000000 ffffffff842c6460 ffff8800ba67fdf8
 0000000041b58ab3 ffffffff83fd0441 ffffffff81d685d0 ffffffff84217840
 fffffbfff0843023 ffff8801db219658 ffffffff84218120 0000000000000000
Call Trace:
 <IRQ> 
 [<ffffffff812ae032>] debug_hrtimer_deactivate kernel/time/hrtimer.c:415 [inline]
 [<ffffffff812ae032>] debug_deactivate kernel/time/hrtimer.c:461 [inline]
 [<ffffffff812ae032>] __run_hrtimer kernel/time/hrtimer.c:1229 [inline]
 [<ffffffff812ae032>] __hrtimer_run_queues+0x492/0xfe0 kernel/time/hrtimer.c:1324
 [<ffffffff812b0386>] hrtimer_interrupt+0x1a6/0x440 kernel/time/hrtimer.c:1358
 [<ffffffff810b0e5a>] local_apic_timer_interrupt+0x6a/0xb0 arch/x86/kernel/apic/apic.c:901
 [<ffffffff8377c576>] smp_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:925
 [<ffffffff8377b4d0>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:741
 <EOI> 
 [<ffffffff81027e65>] arch_safe_halt arch/x86/include/asm/paravirt.h:117 [inline]
 [<ffffffff81027e65>] default_idle+0x55/0x3c0 arch/x86/kernel/process.c:290
 [<ffffffff810293da>] arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:281
 [<ffffffff81221948>] default_idle_call+0x48/0x70 kernel/sched/idle.c:93
 [<ffffffff8122204d>] cpuidle_idle_call kernel/sched/idle.c:157 [inline]
 [<ffffffff8122204d>] cpu_idle_loop kernel/sched/idle.c:253 [inline]
 [<ffffffff8122204d>] cpu_startup_entry+0x5fd/0x8f0 kernel/sched/idle.c:301
 [<ffffffff837667b9>] rest_init+0x189/0x190 init/main.c:410
 [<ffffffff84823811>] start_kernel+0x6b9/0x6ee init/main.c:682
 [<ffffffff84822312>] x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:196
 [<ffffffff84822454>] x86_64_start_kernel+0x140/0x163 arch/x86/kernel/head64.c:185
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  [<ffffffff81d68776>] lookup_object lib/debugobjects.c:120 [inline]
RIP  [<ffffffff81d68776>] debug_object_deactivate+0x1a6/0x3c0 lib/debugobjects.c:465
 RSP <ffff8801db207d20>
---[ end trace 0e979ffe3f5e8a5b ]---