Buffer I/O error on dev loop0, logical block 9, lost async page write
Buffer I/O error on dev loop0, logical block 10, lost async page write
bond0 (unregistering): Released all slaves
buffer_io_error: 5 callbacks suppressed
Buffer I/O error on dev loop0, logical block 16, async page read
INFO: task syz-executor6:28165 blocked for more than 120 seconds.
Not tainted 4.16.0+ #14
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor6 D20768 28165 19529 0x00000006
Call Trace:
context_switch kernel/sched/core.c:2848 [inline]
__schedule+0x8fb/0x1ef0 kernel/sched/core.c:3490
schedule+0xf5/0x430 kernel/sched/core.c:3549
io_schedule+0x1c/0x70 kernel/sched/core.c:5169
wait_on_page_bit_common mm/filemap.c:1099 [inline]
__lock_page+0x574/0x720 mm/filemap.c:1272
lock_page include/linux/pagemap.h:483 [inline]
write_cache_pages+0xb33/0x14b0 mm/page-writeback.c:2206
generic_writepages+0xe9/0x150 mm/page-writeback.c:2325
blkdev_writepages+0x1d/0x30 fs/block_dev.c:1954
do_writepages+0xff/0x170 mm/page-writeback.c:2340
__filemap_fdatawrite_range+0x32f/0x460 mm/filemap.c:444
file_write_and_wait_range+0x8a/0x100 mm/filemap.c:752
blkdev_fsync+0x67/0xb0 fs/block_dev.c:623
vfs_fsync_range+0x110/0x260 fs/sync.c:201
generic_write_sync include/linux/fs.h:2680 [inline]
blkdev_write_iter+0x2e6/0x3e0 fs/block_dev.c:1910
call_write_iter include/linux/fs.h:1782 [inline]
do_iter_readv_writev+0x55c/0x830 fs/read_write.c:680
do_iter_write+0x154/0x540 fs/read_write.c:959
vfs_iter_write+0x77/0xb0 fs/read_write.c:972
iter_file_splice_write+0x7db/0xf30 fs/splice.c:749
do_splice_from fs/splice.c:851 [inline]
direct_splice_actor+0x125/0x180 fs/splice.c:1018
splice_direct_to_actor+0x2c1/0x820 fs/splice.c:973
do_splice_direct+0x29b/0x3c0 fs/splice.c:1061
do_sendfile+0x5c9/0xe80 fs/read_write.c:1440
SYSC_sendfile64 fs/read_write.c:1495 [inline]
SyS_sendfile64+0xbd/0x160 fs/read_write.c:1487
do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4552d9
RSP: 002b:00007ff5137aec68 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007ff5137af6d4 RCX: 00000000004552d9
RDX: 00000000200ddff8 RSI: 0000000000000014 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000102000001 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000004c5 R14: 00000000006fa318 R15: 0000000000000000
Showing all locks held in the system:
3 locks held by kworker/u4:3/93:
#0: 000000002f82f44d ((wq_completion)"writeback"){+.+.}, at: __write_once_size include/linux/compiler.h:215 [inline]
#0: 000000002f82f44d ((wq_completion)"writeback"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: 000000002f82f44d ((wq_completion)"writeback"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline]
#0: 000000002f82f44d ((wq_completion)"writeback"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:57 [inline]
#0: 000000002f82f44d ((wq_completion)"writeback"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: 000000002f82f44d ((wq_completion)"writeback"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: 000000002f82f44d ((wq_completion)"writeback"){+.+.}, at: process_one_work+0xb83/0x1c40 kernel/workqueue.c:2116
#1: 0000000086ccbc77 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0xbd9/0x1c40 kernel/workqueue.c:2120
#2: 00000000019c8bd1 (&type->s_umount_key#35){++++}, at: trylock_super+0x20/0x100 fs/super.c:395
2 locks held by khungtaskd/876:
#0: 00000000c37ccd24 (rcu_read_lock){....}, at: check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline]
#0: 00000000c37ccd24 (rcu_read_lock){....}, at: watchdog+0x1d6/0xd70 kernel/hung_task.c:249
#1: 00000000f225bed4 (tasklist_lock){.+.+}, at: debug_show_all_locks+0xd3/0x3d0 kernel/locking/lockdep.c:4470
2 locks held by getty/4439:
#0: 00000000f01c1d4c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 000000001de4b7b7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131
2 locks held by getty/4440:
#0: 00000000f13b8005 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 000000002be1f11b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131
2 locks held by getty/4441:
#0: 00000000acad0806 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 00000000f259074b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131
2 locks held by getty/4442:
#0: 0000000036e84f33 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 00000000d7ad501b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131
2 locks held by getty/4443:
#0: 00000000ab15b8a8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 000000008e2d425a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131
2 locks held by getty/4444:
#0: 00000000dd640e09 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 00000000a186b747 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131
2 locks held by getty/4445:
#0: 00000000defc591f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 00000000c2b0f89b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131
2 locks held by syz-executor6/28201:
#0: 00000000017a0074 (&lo->lo_ctl_mutex/1){+.+.}, at: lo_ioctl+0x8b/0x1b70 drivers/block/loop.c:1355
#1: 000000009e4cfc6e (&bdev->bd_mutex){+.+.}, at: blkdev_reread_part+0x1e/0x40 block/ioctl.c:192
1 lock held by syz-executor6/28203:
#0: 000000009e4cfc6e (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x176/0x13b0 fs/block_dev.c:1458
1 lock held by syz-executor6/28210:
#0: 00000000017a0074 (&lo->lo_ctl_mutex/1){+.+.}, at: lo_ioctl+0x8b/0x1b70 drivers/block/loop.c:1355
1 lock held by syz-executor6/28211:
#0: 00000000017a0074 (&lo->lo_ctl_mutex/1){+.+.}, at: lo_ioctl+0x8b/0x1b70 drivers/block/loop.c:1355
1 lock held by blkid/28173:
#0: 000000009e4cfc6e (&bdev->bd_mutex){+.+.}, at: blkdev_put+0x2a/0x4f0 fs/block_dev.c:1808
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 876 Comm: khungtaskd Not tainted 4.16.0+ #14
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+0x1a7/0x27d lib/dump_stack.c:53
nmi_cpu_backtrace+0x1e0/0x220 lib/nmi_backtrace.c:103
nmi_trigger_cpumask_backtrace+0x123/0x180 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+0x969/0xd70 kernel/hung_task.c:249
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411
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