INFO: task syz-executor.2:12842 blocked for more than 143 seconds.
Not tainted 6.4.0-rc7-syzkaller-00019-g99ec1ed7c2ed #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:20864 pid:12842 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x187b/0x4900 kernel/sched/core.c:6669
schedule+0xc3/0x180 kernel/sched/core.c:6745
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:192
sync_inodes_sb+0x297/0xab0 fs/fs-writeback.c:2730
sync_filesystem+0x16f/0x220 fs/sync.c:64
generic_shutdown_super+0x6f/0x340 fs/super.c:473
kill_block_super+0x84/0xf0 fs/super.c:1407
deactivate_locked_super+0xa4/0x110 fs/super.c:331
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177
task_work_run+0x24a/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9dfb48d7f7
RSP: 002b:00007ffe9aebbc28 EFLAGS: 00000246
ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f9dfb48d7f7
RDX: 00007ffe9aebbcf9 RSI: 000000000000000a RDI: 00007ffe9aebbcf0
RBP: 00007ffe9aebbcf0 R08: 00000000ffffffff R09: 00007ffe9aebbac0
R10: 00005555561d1893 R11: 0000000000000246 R12: 00007f9dfb4d643b
R13: 00007ffe9aebcdb0 R14: 00005555561d1810 R15: 00007ffe9aebcdf0
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0:
ffffffff8cf276f0
(
rcu_tasks.tasks_gp_mutex
){+.+.}-{3:3}
, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8cf27ab0
(
rcu_tasks_trace.tasks_gp_mutex
){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
#0: ffffffff8cf27520
(
rcu_read_lock
){....}-{1:2}
, at: rcu_lock_acquire+0x0/0x30
6 locks held by kworker/0:3/4738:
2 locks held by getty/4751:
#0: ffff88814b0db098 (&tty->ldisc_sem){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1:
ffffc900015902f0
(
&ldata->atomic_read_lock
){+.+.}-{3:3}
, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2176
4 locks held by kworker/u4:15/10991:
#0:
ffff888019264138
(
(wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378
#1: ffffc90004e4fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380
#2: ffff8881482b4650 (sb_internal#3){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x267/0x1310 fs/xfs/libxfs/xfs_bmap.c:4526
#3: ffff88803da0ed98 (&xfs_nondir_ilock_class#3){++++}-{3:3}, at: xfs_bmapi_convert_delalloc+0x295/0x1310 fs/xfs/libxfs/xfs_bmap.c:4531
2 locks held by syz-executor.2/12842:
#0:
ffff8881482b40e0
(&type->s_umount_key#53){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:361
#1: ffff888140fe47d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
#1: ffff888140fe47d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x278/0xab0 fs/fs-writeback.c:2728
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc7-syzkaller-00019-g99ec1ed7c2ed #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xec2/0xf00 kernel/hung_task.c:379
kthread+0x2b8/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5085 Comm: kworker/0:5 Not tainted 6.4.0-rc7-syzkaller-00019-g99ec1ed7c2ed #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Workqueue: xfs-buf/loop2 xfs_buf_ioend_work
RIP: 0010:put_dec+0x21/0xe0 lib/vsprintf.c:290
Code: 66 0f 1f 84 00 00 00 00 00 41 57 41 56 41 55 41 54 53 48 89 f3 49 89 fe e8 fc 98 e1 f6 bf ff e0 f5 05 48 89 de e8 2f 9d e1 f6 <48> 81 fb ff e0 f5 05 0f 86 86 00 00 00 49 bd fd ce 61 84 11 77 cc
RSP: 0018:ffffc90004b8f050 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000075cd4 RCX: ffff88802d400000
RDX: 0000000000000000 RSI: 0000000000075cd4 RDI: 0000000005f5e0ff
RBP: ffffc90004b8f190 R08: ffffffff8aa9e6b1 R09: 0000000000000000
R10: ffffc90004b8f100 R11: dffffc0000000001 R12: 00000000ffff0a00
R13: dffffc0000000000 R14: ffffc90004b8f100 R15: ffffc90004b8f4e7
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000010c2470 CR3: 000000002d0fb000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
number+0x337/0xf90 lib/vsprintf.c:509
vsnprintf+0x153d/0x1d80 lib/vsprintf.c:2883
sprintf+0xda/0x120 lib/vsprintf.c:3021
print_time kernel/printk/printk.c:1327 [inline]
info_print_prefix+0x16b/0x300 kernel/printk/printk.c:1353
record_print_text kernel/printk/printk.c:1402 [inline]
printk_get_next_message+0x408/0xce0 kernel/printk/printk.c:2809
console_emit_next_record kernel/printk/printk.c:2844 [inline]
console_flush_all+0x3aa/0xd70 kernel/printk/printk.c:2933
console_unlock+0xff/0x270 kernel/printk/printk.c:3007
vprintk_emit+0xd5/0x1f0 kernel/printk/printk.c:2307
_printk+0xd5/0x120 kernel/printk/printk.c:2328
__xfs_printk fs/xfs/xfs_message.c:24 [inline]
_xfs_alert_tag+0x1d4/0x2f0 fs/xfs/xfs_message.c:74
xfs_buf_verifier_error+0x152/0x2a0 fs/xfs/xfs_error.c:449
xfs_allocbt_read_verify+0x5a/0xd0
xfs_buf_ioend+0x270/0x6f0 fs/xfs/xfs_buf.c:1302
process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405
worker_thread+0xa63/0x1210 kernel/workqueue.c:2552
kthread+0x2b8/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308