INFO: task kworker/u8:6:1154 blocked for more than 143 seconds.
Not tainted 6.12.0-rc7-syzkaller-00070-g0a9b9d17f3a7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:6 state:D stack:16944 pid:1154 tgid:1154 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-bcachefs-18)
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x17fa/0x4bd0 kernel/sched/core.c:6693
__schedule_loop kernel/sched/core.c:6770 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6785
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
__closure_sync_timeout+0x2d8/0x450 lib/closure.c:217
closure_sync_timeout include/linux/closure.h:206 [inline]
__bch2_wait_on_allocator+0x11a/0x250 fs/bcachefs/alloc_foreground.c:1812
bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:239 [inline]
__bch2_write+0x562a/0x5dd0 fs/bcachefs/io_write.c:1501
bch2_write+0x9b5/0x1760 fs/bcachefs/io_write.c:1631
closure_queue include/linux/closure.h:270 [inline]
closure_call include/linux/closure.h:432 [inline]
bch2_writepage_do_io fs/bcachefs/fs-io-buffered.c:449 [inline]
bch2_writepages+0x27d/0x380 fs/bcachefs/fs-io-buffered.c:641
do_writepages+0x35d/0x870 mm/page-writeback.c:2683
__writeback_single_inode+0x14f/0x10d0 fs/fs-writeback.c:1658
writeback_sb_inodes+0x80c/0x1370 fs/fs-writeback.c:1954
wb_writeback+0x41b/0xbd0 fs/fs-writeback.c:2134
wb_do_writeback fs/fs-writeback.c:2281 [inline]
wb_workfn+0x410/0x1090 fs/fs-writeback.c:2321
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
INFO: task syz-executor:6371 blocked for more than 144 seconds.
Not tainted 6.12.0-rc7-syzkaller-00070-g0a9b9d17f3a7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:19768 pid:6371 tgid:6371 ppid:1 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x17fa/0x4bd0 kernel/sched/core.c:6693
__schedule_loop kernel/sched/core.c:6770 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6785
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:216
__writeback_inodes_sb_nr+0x2d2/0x380 fs/fs-writeback.c:2713
sync_filesystem+0xa4/0x230 fs/sync.c:54
generic_shutdown_super+0x72/0x2d0 fs/super.c:621
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2278
deactivate_locked_super+0xc4/0x130 fs/super.c:473
cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
task_work_run+0x24f/0x310 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8e74f7fa47
RSP: 002b:00007ffd5a1bfcd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f8e74f7fa47
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd5a1bfd90
RBP: 00007ffd5a1bfd90 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd5a1c0e10
R13: 00007f8e74ff15fc R14: 000000000002329f R15: 00007ffd5a1c0e50
</TASK>
INFO: task bch-copygc/loop:7217 blocked for more than 145 seconds.
Not tainted 6.12.0-rc7-syzkaller-00070-g0a9b9d17f3a7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-copygc/loop state:D stack:20112 pid:7217 tgid:7217 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x17fa/0x4bd0 kernel/sched/core.c:6693
__schedule_loop kernel/sched/core.c:6770 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6785
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
__closure_sync_timeout+0x2d8/0x450 lib/closure.c:217
closure_sync_timeout include/linux/closure.h:206 [inline]
__bch2_wait_on_allocator+0x11a/0x250 fs/bcachefs/alloc_foreground.c:1812
bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:239 [inline]
__bch2_write+0x562a/0x5dd0 fs/bcachefs/io_write.c:1501
bch2_write+0x9b5/0x1760 fs/bcachefs/io_write.c:1631
closure_queue include/linux/closure.h:270 [inline]
closure_call include/linux/closure.h:432 [inline]
bch2_data_update_read_done+0x22e/0x330 fs/bcachefs/data_update.c:426
move_write fs/bcachefs/move.c:133 [inline]
bch2_moving_ctxt_do_pending_writes+0x44c/0x8d0 fs/bcachefs/move.c:164
bch2_move_ratelimit+0x76c/0xeb0 fs/bcachefs/move.c:492
bch2_evacuate_bucket+0x26b3/0x3620 fs/bcachefs/move.c:702
bch2_copygc+0x42c9/0x4ca0 fs/bcachefs/movinggc.c:240
bch2_copygc_thread+0x737/0xc20 fs/bcachefs/movinggc.c:381
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by kworker/u8:6/1154:
#0: ffff8881416db948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff8881416db948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90004337d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90004337d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
2 locks held by getty/5592:
#0: ffff8880313cf0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900032232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/6371:
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
3 locks held by kworker/u8:8/6654:
1 lock held by syz.9.250/8087:
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.9.250/8090:
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.9.250/8095:
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.9.250/8097:
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.9.250/8099:
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.9.250/8101:
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.9.250/8103:
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.9.250/8104:
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.9.250/8105:
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.9.250/8107:
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.9.250/8111:
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.9.250/8113:
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.7.288/8571:
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888034dba0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz-executor/9134:
#0: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#0: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
1 lock held by syz.7.396/9706:
1 lock held by syz.9.397/9713:
#0: ffff888062d680e0 (&type->s_umount_key#60/1){+.+.}-{3:3}, at: alloc_super+0x221/0x9d0 fs/super.c:344
3 locks held by dhcpcd-run-hook/9728:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc7-syzkaller-00070-g0a9b9d17f3a7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 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+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 9706 Comm: syz.7.396 Not tainted 6.12.0-rc7-syzkaller-00070-g0a9b9d17f3a7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0033:0x7f163a6418db
Code: cd 48 01 c1 49 39 4f 08 72 4c 8d 4d ff 85 ed 74 33 66 0f 1f 44 00 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 47 0f b6 0c 08 <45> 84 c9 74 08 45 88 0c 00 49 8b 47 10 48 83 c0 01 49 89 47 10 83
RSP: 002b:00007f163b4cd4a0 EFLAGS: 00000202
RAX: 00000000001c614d RBX: 00007f163b4cd540 RCX: 0000000000000092
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007f163b4cd5e0
RBP: 0000000000000102 R08: 00007f1630600000 R09: 0000000000000000
R10: 0000000000000000 R11: 00007f163b4cd550 R12: 0000000000000001
R13: 00007f163a805fc0 R14: 0000000000000000 R15: 00007f163b4cd5e0
FS: 00007f163b4ce6c0 GS: 0000000000000000