IPVS: ip_vs_svc_hash(): request for already hashed, called from do_ip_vs_set_ctl+0xae8/0xbb0 net/netfilter/ipvs/ip_vs_ctl.c:2462
bridge_slave_0: FDB only supports static addresses
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=36212 sclass=netlink_route_socket pig=21817 comm=syz-executor5
INFO: task syz-executor3:21769 blocked for more than 120 seconds.
      Not tainted 4.9.109-ga4230be #51
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor3   D23944 21769   3828 0x00000004
 ffff8801c8e88000 ffff8801ca129f80 ffff8801ca128fc0 ffff880186a64800
 ffff8801db221c18 ffff880198f17890 ffffffff839e8a8d 1ffff100331e2f06
 ffffffff855802b0 0000000041b58ab3 00ffffff843c2288 ffff8801db2224e8
Call Trace:
 [<ffffffff839ea08f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3557
 [<ffffffff839f64a1>] schedule_timeout+0x861/0xf70 kernel/time/timer.c:1768
 [<ffffffff839e826a>] io_schedule_timeout+0x1ba/0x390 kernel/sched/core.c:5180
 [<ffffffff839eb4d9>] io_schedule include/linux/sched.h:460 [inline]
 [<ffffffff839eb4d9>] bit_wait_io+0x19/0xa0 kernel/sched/wait.c:582
 [<ffffffff839ead7e>] __wait_on_bit_lock+0xce/0x1c0 kernel/sched/wait.c:421
 [<ffffffff8143451f>] __lock_page+0xff/0x160 mm/filemap.c:934
 [<ffffffff8143a2e9>] lock_page include/linux/pagemap.h:454 [inline]
 [<ffffffff8143a2e9>] pagecache_get_page+0x409/0x720 mm/filemap.c:1216
 [<ffffffff8146bbe6>] find_lock_page include/linux/pagemap.h:284 [inline]
 [<ffffffff8146bbe6>] truncate_inode_pages_range+0xca6/0x1290 mm/truncate.c:320
 [<ffffffff8163288d>] blkdev_fallocate+0x21d/0x440 fs/block_dev.c:1817
 [<ffffffff815686b9>] vfs_fallocate+0x359/0x600 fs/open.c:329
 [<ffffffff8156b5c3>] SYSC_fallocate fs/open.c:352 [inline]
 [<ffffffff8156b5c3>] SyS_fallocate+0x53/0x90 fs/open.c:346
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f9993>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Showing all locks held in the system:
2 locks held by khungtaskd/519:
 #0:  (rcu_read_lock){......}, at: [<ffffffff8136662c>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8136662c>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff81425cb7>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
2 locks held by getty/3775:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff839f7b32>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff8211fce2>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2133
1 lock held by syz-executor3/21769:
 #0:  (sb_writers){.+.+.+}, at: [<ffffffff8156865b>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers){.+.+.+}, at: [<ffffffff8156865b>] vfs_fallocate+0x2fb/0x600 fs/open.c:328
1 lock held by syz-executor3/21828:
 #0:  (sb_writers){.+.+.+}, at: [<ffffffff8156865b>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers){.+.+.+}, at: [<ffffffff8156865b>] vfs_fallocate+0x2fb/0x600 fs/open.c:328

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.109-ga4230be #51
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d86d7d08 ffffffff81eb3e29 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff810b9580 ffff8801d86d7d40
 ffffffff81ebf127 0000000000000001 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81eb3e29>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb3e29>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81ebf127>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81ebf0ba>] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60
 [<ffffffff810b9684>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff81366bc4>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff81366bc4>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81366bc4>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81366bc4>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
 [<ffffffff8119d04d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff839f9b5c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3677 Comm: rs:main Q:Reg Not tainted 4.9.109-ga4230be #51
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c3911800 task.stack: ffff8801c4ce0000
RIP: 0010:[<ffffffff8107b84b>] 
c [<ffffffff8107b84b>] __save_stack_trace+0xb/0xf0 arch/x86/kernel/stacktrace.c:34
RSP: 0018:ffff8801c4ce72b8  EFLAGS: 00000246
RAX: ffff8801c4ce7300 RBX: 0000000002408040 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8801c3911800 RDI: ffff8801c4ce72e8
RBP: ffff8801c4ce72c8 R08: 0000000000000005 R09: ffffed0037419cd6
R10: 0000000000000000 R11: 1ffff1003872242c R12: ffff8801d49e9b40
R13: ffff8801ba0ce6b0 R14: ffff8801c3911800 R15: ffff8801ba0ce6af
FS:  00007fa590cb3700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000131eb10 CR3: 00000001d87c8000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801ba0ce6b0
c 0000000000000000
c ffff8801c4ce72d8
c ffffffff8107b946
c
 ffff8801c4ce7508
c ffffffff8153aa73
c 0000004000000000
c ffff8801c4ce7300
c
 0000000000000000
c ffff8801c4ce7398
c ffffffff81ec0b43
c ffff8801b7b703f8
c
Call Trace:
 [<ffffffff8107b946>] save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57
 [<ffffffff8153aa73>] save_stack+0x43/0xd0 mm/kasan/kasan.c:505
 [<ffffffff8153ae57>] set_track mm/kasan/kasan.c:517 [inline]
 [<ffffffff8153ae57>] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:609
 [<ffffffff8153b422>] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:547
 [<ffffffff81536d4e>] slab_post_alloc_hook mm/slab.h:417 [inline]
 [<ffffffff81536d4e>] slab_alloc_node mm/slub.c:2715 [inline]
 [<ffffffff81536d4e>] slab_alloc mm/slub.c:2723 [inline]
 [<ffffffff81536d4e>] kmem_cache_alloc+0xbe/0x290 mm/slub.c:2728
 [<ffffffff81885527>] kmem_cache_zalloc include/linux/slab.h:626 [inline]
 [<ffffffff81885527>] jbd2_alloc_handle include/linux/jbd2.h:1419 [inline]
 [<ffffffff81885527>] new_handle fs/jbd2/transaction.c:397 [inline]
 [<ffffffff81885527>] jbd2__journal_start+0x147/0x8b0 fs/jbd2/transaction.c:441
 [<ffffffff818061fc>] __ext4_journal_start_sb+0x10c/0x460 fs/ext4/ext4_jbd2.c:76
 [<ffffffff81754264>] __ext4_journal_start fs/ext4/ext4_jbd2.h:318 [inline]
 [<ffffffff81754264>] ext4_truncate+0x434/0x12c0 fs/ext4/inode.c:4233
 [<ffffffff817569db>] ext4_truncate_failed_write fs/ext4/truncate.h:15 [inline]
 [<ffffffff817569db>] ext4_da_write_begin+0x4eb/0x1020 fs/ext4/inode.c:3015
 [<ffffffff81435c91>] generic_perform_write+0x301/0x510 mm/filemap.c:2740
 [<ffffffff8143d722>] __generic_file_write_iter+0x352/0x540 mm/filemap.c:2865
 [<ffffffff8172cf33>] ext4_file_write_iter+0x463/0xd90 fs/ext4/file.c:165
 [<ffffffff8156eb60>] new_sync_write fs/read_write.c:496 [inline]
 [<ffffffff8156eb60>] __vfs_write+0x3e0/0x580 fs/read_write.c:509
 [<ffffffff81572957>] vfs_write+0x187/0x530 fs/read_write.c:557
 [<ffffffff81576789>] SYSC_write fs/read_write.c:604 [inline]
 [<ffffffff81576789>] SyS_write+0xd9/0x1c0 fs/read_write.c:596
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f9993>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
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c