INFO: task kworker/0:2:12170 blocked for more than 143 seconds.
Not tainted 6.10.0-rc5-syzkaller-00018-g55027e689933 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2 state:D stack:24112 pid:12170 tgid:12170 ppid:2 flags:0x00004000
Workqueue: events_long bch2_fs_read_only_work
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
journal_quiesce fs/bcachefs/journal.c:474 [inline]
journal_quiesce+0x274/0x2b0 fs/bcachefs/journal.c:472
bch2_fs_journal_stop+0x186/0x400 fs/bcachefs/journal.c:1184
__bch2_fs_read_only+0x334/0x500 fs/bcachefs/super.c:291
bch2_fs_read_only+0x9b2/0xf10 fs/bcachefs/super.c:356
bch2_fs_read_only_work+0x2c/0x40 fs/bcachefs/super.c:393
process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
INFO: task syz.1.4531:27646 blocked for more than 143 seconds.
Not tainted 6.10.0-rc5-syzkaller-00018-g55027e689933 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.4531 state:D stack:20624 pid:27646 tgid:27645 ppid:25702 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
__down_write_common+0x950/0x13f0 kernel/locking/rwsem.c:1306
__bch2_fs_stop+0xf4/0x540 fs/bcachefs/super.c:614
bch2_fs_stop fs/bcachefs/super.c:674 [inline]
bch2_fs_open+0x761/0x1110 fs/bcachefs/super.c:2144
bch2_mount+0xe2c/0x1230 fs/bcachefs/fs.c:1926
legacy_get_tree+0x109/0x220 fs/fs_context.c:662
vfs_get_tree+0x8f/0x380 fs/super.c:1780
do_new_mount fs/namespace.c:3352 [inline]
path_mount+0x14e6/0x1f20 fs/namespace.c:3679
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount fs/namespace.c:3875 [inline]
__x64_sys_mount+0x297/0x320 fs/namespace.c:3875
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f71b4d771ea
RSP: 002b:00007f71b5c30e78 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f71b5c30f00 RCX: 00007f71b4d771ea
RDX: 00000000200004c0 RSI: 0000000020000100 RDI: 00007f71b5c30ec0
RBP: 00000000200004c0 R08: 00007f71b5c30f00 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000100
R13: 00007f71b5c30ec0 R14: 0000000000005d9f R15: 0000000020000380
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8dbbd0b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: raw_spin_rq_lock_nested kernel/sched/core.c:567 [inline]
#0: ffffffff8dbbd0b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:552
1 lock held by khungtaskd/30:
#0: ffffffff8dbb1920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8dbb1920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8dbb1920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
3 locks held by kworker/u8:2/35:
#0: ffff888015489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206
#1: ffffc90000ab7d80 ((work_completion)(&map->work)){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207
#2: ffffffff8dbbd0b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:323
2 locks held by getty/4840:
#0: ffff88802b1b60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211
3 locks held by kworker/0:6/5139:
#0: ffff888019ebc548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206
#1: ffffc900038ffd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207
#2: ffff888023c68190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#2: ffff888023c68190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4e20 drivers/usb/core/hub.c:5849
3 locks held by kworker/0:2/12170:
#0: ffff888015481148 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206
#1: ffffc9000368fd80 ((work_completion)(&c->read_only_work)){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207
#2: ffff88804a200278 (&c->state_lock){+.+.}-{3:3}, at: bch2_fs_read_only_work+0x24/0x40 fs/bcachefs/super.c:392
1 lock held by syz.1.4531/27646:
#0: ffff88804a200278 (&c->state_lock){+.+.}-{3:3}, at: __bch2_fs_stop+0xf4/0x540 fs/bcachefs/super.c:614
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc5-syzkaller-00018-g55027e689933 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:112