IPVS: ftp: loaded support on port[0] = 21
IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready
INFO: task syz-executor2:15931 blocked for more than 120 seconds.
Not tainted 4.15.0+ #298
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2 D21744 15931 4131 0x80000006
Call Trace:
context_switch kernel/sched/core.c:2845 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3421
schedule+0xf5/0x430 kernel/sched/core.c:3480
io_schedule+0x1c/0x70 kernel/sched/core.c:5096
wait_on_page_bit_common+0x4b3/0x770 mm/filemap.c:1099
wait_on_page_bit mm/filemap.c:1132 [inline]
wait_on_page_writeback include/linux/pagemap.h:546 [inline]
__filemap_fdatawait_range+0x282/0x430 mm/filemap.c:533
filemap_fdatawait_range mm/filemap.c:558 [inline]
filemap_fdatawait include/linux/fs.h:2590 [inline]
filemap_write_and_wait+0x7a/0xd0 mm/filemap.c:624
__sync_blockdev fs/block_dev.c:448 [inline]
sync_blockdev.part.29+0x50/0x70 fs/block_dev.c:457
sync_blockdev fs/block_dev.c:444 [inline]
__blkdev_put+0x18b/0x7f0 fs/block_dev.c:1763
blkdev_put+0x85/0x4f0 fs/block_dev.c:1835
blkdev_close+0x8b/0xb0 fs/block_dev.c:1842
__fput+0x327/0x7e0 fs/file_table.c:209
____fput+0x15/0x20 fs/file_table.c:243
task_work_run+0x199/0x270 kernel/task_work.c:113
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0x9bb/0x1ad0 kernel/exit.c:865
do_group_exit+0x149/0x400 kernel/exit.c:968
get_signal+0x73a/0x16d0 kernel/signal.c:2469
do_signal+0x90/0x1e90 arch/x86/kernel/signal.c:809
exit_to_usermode_loop+0x258/0x2f0 arch/x86/entry/common.c:162
prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
syscall_return_slowpath arch/x86/entry/common.c:265 [inline]
do_syscall_64+0x6ed/0x940 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453299
RSP: 002b:00007efea734cc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000001
RAX: 0000000000003000 RBX: 000000000071bea0 RCX: 0000000000453299
RDX: 00000000fffffef1 RSI: 0000000020d3f000 RDI: 0000000000000014
RBP: 0000000000000654 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f8880
R13: 00000000ffffffff R14: 00007efea734d6d4 R15: 0000000000000000
Showing all locks held in the system:
2 locks held by khungtaskd/756:
#0: (rcu_read_lock){....}, at: [<00000000951271ec>] check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline]
#0: (rcu_read_lock){....}, at: [<00000000951271ec>] watchdog+0x1c5/0xd60 kernel/hung_task.c:249
#1: (tasklist_lock){.+.+}, at: [<000000008dd44379>] debug_show_all_locks+0xd3/0x3d0 kernel/locking/lockdep.c:4470
1 lock held by rsyslogd/3929:
#0: (&f->f_pos_lock){+.+.}, at: [<0000000024acb50a>] __fdget_pos+0x12b/0x190 fs/file.c:765
2 locks held by getty/4050:
#0: (&tty->ldisc_sem){++++}, at: [<00000000a60e0f93>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000414844e6>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131
2 locks held by getty/4051:
#0: (&tty->ldisc_sem){++++}, at: [<00000000a60e0f93>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000414844e6>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131
2 locks held by getty/4052:
#0: (&tty->ldisc_sem){++++}, at: [<00000000a60e0f93>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000414844e6>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131
2 locks held by getty/4053:
#0: (&tty->ldisc_sem){++++}, at: [<00000000a60e0f93>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000414844e6>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131
2 locks held by getty/4054:
#0: (&tty->ldisc_sem){++++}, at: [<00000000a60e0f93>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000414844e6>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131
2 locks held by getty/4055:
#0: (&tty->ldisc_sem){++++}, at: [<00000000a60e0f93>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000414844e6>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131
2 locks held by getty/4056:
#0: (&tty->ldisc_sem){++++}, at: [<00000000a60e0f93>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000414844e6>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131
3 locks held by kworker/u4:10/11585:
#0: ((wq_completion)"writeback"){+.+.}, at: [<00000000441e169d>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
#1: ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: [<00000000532158a4>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
#2: (&type->s_umount_key#27){.+.+}, at: [<00000000395cd791>] trylock_super+0x20/0x100 fs/super.c:395
1 lock held by syz-executor2/15931:
#0: (&bdev->bd_mutex){+.+.}, at: [<00000000384bcfab>] __blkdev_put+0xbc/0x7f0 fs/block_dev.c:1757
1 lock held by syz-executor2/16117:
#0: (&bdev->bd_mutex){+.+.}, at: [<00000000b5035b8c>] __blkdev_get+0x158/0x10e0 fs/block_dev.c:1439
1 lock held by syz-executor2/16118:
#0: (&bdev->bd_mutex){+.+.}, at: [<00000000b5035b8c>] __blkdev_get+0x158/0x10e0 fs/block_dev.c:1439
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 756 Comm: khungtaskd Not tainted 4.15.0+ #298
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103
nmi_trigger_cpumask_backtrace+0x122/0x180 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline]
check_hung_task kernel/hung_task.c:132 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:190 [inline]
watchdog+0x90c/0xd60 kernel/hung_task.c:249
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54