device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
INFO: task syz-executor0:10662 blocked for more than 140 seconds.
b_state=0x00000029, b_size=512
Not tainted 4.20.0-rc1+ #107
device loop0 blocksize: 4096
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
syz-executor0 D20488 10662 5851 0x00000004
device loop0 blocksize: 4096
Call Trace:
__find_get_block_slow() failed. block=1, b_blocknr=8
context_switch kernel/sched/core.c:2831 [inline]
__schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
schedule+0xfe/0x460 kernel/sched/core.c:3516
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
io_schedule+0x1c/0x70 kernel/sched/core.c:5137
b_state=0x00000029, b_size=512
wait_on_page_bit_common+0x75b/0x13d0 mm/filemap.c:1088
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
wait_on_page_bit+0x43/0x50 mm/filemap.c:1127
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
wait_on_page_writeback include/linux/pagemap.h:546 [inline]
truncate_inode_pages_range+0x153f/0x2d50 mm/truncate.c:447
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
truncate_inode_pages mm/truncate.c:475 [inline]
truncate_pagecache+0x66/0x90 mm/truncate.c:798
b_state=0x00000029, b_size=512
truncate_setsize+0x70/0xb0 mm/truncate.c:823
device loop0 blocksize: 4096
fat_setattr+0xc16/0xe20 fs/fat/file.c:540
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
notify_change+0xbde/0x1110 fs/attr.c:334
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
do_truncate+0x1bd/0x2d0 fs/open.c:63
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
handle_truncate fs/namei.c:3008 [inline]
do_last fs/namei.c:3424 [inline]
path_openat+0x375f/0x5150 fs/namei.c:3534
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
do_filp_open+0x255/0x380 fs/namei.c:3564
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
do_sys_open+0x568/0x700 fs/open.c:1063
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
ksys_open include/linux/syscalls.h:1279 [inline]
__do_sys_creat fs/open.c:1121 [inline]
__se_sys_creat fs/open.c:1119 [inline]
__x64_sys_creat+0x61/0x80 fs/open.c:1119
__find_get_block_slow() failed. block=1, b_blocknr=8
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
Code: Bad RIP value.
device loop0 blocksize: 4096
RSP: 002b:00007f7bae5cdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
__find_get_block_slow() failed. block=1, b_blocknr=8
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457569
b_state=0x00000029, b_size=512
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180
device loop0 blocksize: 4096
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
__find_get_block_slow() failed. block=1, b_blocknr=8
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7bae5ce6d4
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
R13: 00000000004bdb2f R14: 00000000004cc908 R15: 00000000ffffffff
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
Showing all locks held in the system:
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
6 locks held by kworker/u4:2/45:
__find_get_block_slow() failed. block=1, b_blocknr=8
1 lock held by khungtaskd/1008:
b_state=0x00000029, b_size=512
#0: 000000005103b310 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379
device loop0 blocksize: 4096
1 lock held by rsyslogd/5687:
__find_get_block_slow() failed. block=1, b_blocknr=8
#0: 000000006ca14412 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766
b_state=0x00000029, b_size=512
2 locks held by getty/5810:
device loop0 blocksize: 4096
#0: 00000000513bcf64 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
__find_get_block_slow() failed. block=1, b_blocknr=8
#1: 00000000119b7e88 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
b_state=0x00000029, b_size=512
2 locks held by getty/5811:
device loop0 blocksize: 4096
#0: 0000000098c7f5d4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
__find_get_block_slow() failed. block=1, b_blocknr=8
#1: 00000000e3755468 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
b_state=0x00000029, b_size=512
2 locks held by getty/5812:
device loop0 blocksize: 4096
#0: 0000000033becc32 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
__find_get_block_slow() failed. block=1, b_blocknr=8
#1: 00000000ae870e8d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
2 locks held by getty/5813:
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
#0: 00000000ba18d40e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
b_state=0x00000029, b_size=512
#1: 0000000051c0eb82 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
2 locks held by getty/5814:
b_state=0x00000029, b_size=512
#0: 000000005e44d5d2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
device loop0 blocksize: 4096
#1: 000000007b853ac5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
__find_get_block_slow() failed. block=1, b_blocknr=8
2 locks held by getty/5815:
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
#0: 000000003082f085 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
b_state=0x00000029, b_size=512
#1: 0000000075319905 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
2 locks held by getty/5816:
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
#0: 000000000ce69b45 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
b_state=0x00000029, b_size=512
#1: 0000000042803500 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
device loop0 blocksize: 4096
3 locks held by syz-executor0/10662:
__find_get_block_slow() failed. block=1, b_blocknr=8
#0: 00000000229682b0 (sb_writers#19){.+.+}, at: sb_start_write include/linux/fs.h:1597 [inline]
#0: 00000000229682b0 (sb_writers#19){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360
b_state=0x00000029, b_size=512
#1: 0000000002f72ec4 (&sb->s_type->i_mutex_key#27){+.+.}, at: inode_lock include/linux/fs.h:757 [inline]
#1: 0000000002f72ec4 (&sb->s_type->i_mutex_key#27){+.+.}, at: do_truncate+0x1b0/0x2d0 fs/open.c:61
device loop0 blocksize: 4096
#2: 00000000256032fe (&ei->truncate_lock){+.+.}, at: fat_setattr+0xbef/0xe20 fs/fat/file.c:539
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
=============================================
NMI backtrace for cpu 0
b_state=0x00000029, b_size=512
CPU: 0 PID: 1008 Comm: khungtaskd Not tainted 4.20.0-rc1+ #107
device loop0 blocksize: 4096
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x244/0x39d lib/dump_stack.c:113
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
nmi_cpu_backtrace.cold.2+0x5c/0xa1 lib/nmi_backtrace.c:101
device loop0 blocksize: 4096
nmi_trigger_cpumask_backtrace+0x1e8/0x22a 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:144 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
watchdog+0xb51/0x1060 kernel/hung_task.c:289
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
kthread+0x35a/0x440 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1:
device loop0 blocksize: 4096
NMI backtrace for cpu 1
CPU: 1 PID: 45 Comm: kworker/u4:2 Not tainted 4.20.0-rc1+ #107
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:__sanitizer_cov_trace_switch+0x40/0x90 kernel/kcov.c:224
Code: 6b 76 4a 48 83 f8 20 74 5b 48 83 f8 40 41 be 07 00 00 00 75 2d 4c 8b 3e 31 db 49 89 f4 49 89 fd 4d 85 ff 74 1d 49 8b 74 dc 10 <4c> 89 ea 4c 89 f7 48 83 c3 01 48 8b 4d 08 e8 ed fd ff ff 49 39 df
RSP: 0018:ffff8801d95bdac0 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff87ca4c79
RDX: 0000000000000075 RSI: 0000000000000063 RDI: 0000000000000001
RBP: ffff8801d95bdae8 R08: ffff8801d95b4400 R09: ffffed003b2b7bab
R10: ffffed003b2b7bab R11: 0000000000000003 R12: ffffffff88d60c20
R13: 0000000000000075 R14: 0000000000000001 R15: 000000000000000a
FS: 0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000001bea67000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
format_decode+0x3a9/0xaf0 lib/vsprintf.c:2107
vsnprintf+0x185/0x1b60 lib/vsprintf.c:2248
snprintf+0xae/0xe0 lib/vsprintf.c:2429
print_time kernel/printk/printk.c:1226 [inline]
print_prefix+0x38e/0x3f0 kernel/printk/printk.c:1251
msg_print_text+0x83/0x1d0 kernel/printk/printk.c:1274
console_unlock+0x4e6/0x1190 kernel/printk/printk.c:2388
vprintk_emit+0x391/0x990 kernel/printk/printk.c:1922
vprintk_default+0x28/0x30 kernel/printk/printk.c:1964
vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398
printk+0xa7/0xcf kernel/printk/printk.c:1997
__find_get_block_slow fs/buffer.c:237 [inline]
__find_get_block.cold.57+0xd8/0xff fs/buffer.c:1294
__getblk_slow fs/buffer.c:1039 [inline]
__getblk_gfp+0x2b3/0xd50 fs/buffer.c:1320
__bread_gfp+0x2d/0x310 fs/buffer.c:1354
sb_bread include/linux/buffer_head.h:307 [inline]
__fat_write_inode+0x347/0xb60 fs/fat/inode.c:859
fat_write_inode+0x97/0x180 fs/fat/inode.c:908
write_inode fs/fs-writeback.c:1176 [inline]
__writeback_single_inode+0xf56/0x1660 fs/fs-writeback.c:1375
writeback_sb_inodes+0x71f/0x1210 fs/fs-writeback.c:1580
__writeback_inodes_wb+0x1b9/0x340 fs/fs-writeback.c:1649
wb_writeback+0xa73/0xfc0 fs/fs-writeback.c:1758
wb_check_background_flush fs/fs-writeback.c:1826 [inline]
wb_do_writeback fs/fs-writeback.c:1914 [inline]
wb_workfn+0xd65/0x1790 fs/fs-writeback.c:1942
process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153
worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
kthread+0x35a/0x440 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352