INFO: task syz-executor:5831 blocked for more than 143 seconds.
Not tainted 6.14.0-syzkaller-11270-g08733088b566 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:19840 pid:5831 tgid:5831 ppid:1 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_timeout+0xb1/0x2b0 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x32f/0x600 kernel/sched/completion.c:148
kthread_stop+0x1a1/0x640 kernel/kthread.c:791
bch2_copygc_stop+0x4f/0x150 fs/bcachefs/movinggc.c:424
__bch2_fs_read_only+0x47/0x450 fs/bcachefs/super.c:262
bch2_fs_read_only+0xd16/0x1400 fs/bcachefs/super.c:353
__bch2_fs_stop+0x107/0x5b0 fs/bcachefs/super.c:633
generic_shutdown_super+0x13b/0x2d0 fs/super.c:642
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2303
deactivate_locked_super+0xc6/0x130 fs/super.c:473
cleanup_mnt+0x422/0x4c0 fs/namespace.c:1435
task_work_run+0x253/0x310 kernel/task_work.c:227
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:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd4b018e497
RSP: 002b:00007ffd662aec18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fd4b020e08c RCX: 00007fd4b018e497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd662aecd0
RBP: 00007ffd662aecd0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd662afd60
R13: 00007fd4b020e08c R14: 0000000000018637 R15: 00007ffd662afda0
INFO: task bch-reclaim/loo:5947 blocked for more than 145 seconds.
Not tainted 6.14.0-syzkaller-11270-g08733088b566 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-reclaim/loo state:D stack:26000 pid:5947 tgid:5947 ppid:2 task_flags:0x200840 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
__mutex_lock_common kernel/locking/mutex.c:664 [inline]
__mutex_lock+0x805/0x10c0 kernel/locking/mutex.c:732
btree_write_buffer_flush_seq+0x1aec/0x1ca0 fs/bcachefs/btree_write_buffer.c:569
bch2_btree_write_buffer_journal_flush+0xc9/0x160 fs/bcachefs/btree_write_buffer.c:586
journal_flush_pins+0x89d/0xe40 fs/bcachefs/journal_reclaim.c:589
__bch2_journal_reclaim+0x789/0xda0 fs/bcachefs/journal_reclaim.c:720
bch2_journal_reclaim_thread+0x16d/0x580 fs/bcachefs/journal_reclaim.c:762
kthread+0x7b9/0x940 kernel/kthread.c:464
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
1 lock held by khungtaskd/31:
#0: ffffffff8ed3b560 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8ed3b560 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8ed3b560 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6764
2 locks held by getty/5589:
#0: ffff8880363a20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900033532f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x53d/0x16b0 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/5831:
#0: ffff88805564e0e0 (&type->s_umount_key#54){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88805564e0e0 (&type->s_umount_key#54){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88805564e0e0 (&type->s_umount_key#54){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffff888057680278 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xff/0x5b0 fs/bcachefs/super.c:632
3 locks held by bch-reclaim/loo/5947:
#0: ffff8880576cace8 (&j->reclaim_lock){+.+.}-{4:4}, at: bch2_journal_reclaim_thread+0x160/0x580 fs/bcachefs/journal_reclaim.c:761
#1: ffff888057684210 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:161 [inline]
#1: ffff888057684210 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:253 [inline]
#1: ffff888057684210 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7ed/0xd40 fs/bcachefs/btree_iter.c:3386
#2: ffff8880576845b8 (&wb->flushing.lock){+.+.}-{4:4}, at: btree_write_buffer_flush_seq+0x1aec/0x1ca0 fs/bcachefs/btree_write_buffer.c:569
3 locks held by bch-copygc/loop/5959:
#0: ffff888057684210 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:161 [inline]
#0: ffff888057684210 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:253 [inline]
#0: ffff888057684210 (&c->btree_trans_barrier){.+.+}-{0:0}, at: bch2_trans_srcu_lock+0x9a/0x1a0 fs/bcachefs/btree_iter.c:3203
#1: ffff8880576845b8 (&wb->flushing.lock){+.+.}-{4:4}, at: btree_write_buffer_flush_seq+0x1aec/0x1ca0 fs/bcachefs/btree_write_buffer.c:569
#2: ffff8880576a6550 (&c->gc_lock){++++}-{4:4}, at: bch2_btree_update_start+0x68a/0x16c0 fs/bcachefs/btree_update_interior.c:1179
5 locks held by kworker/u8:12/6694:
#0: ffff88801bef6148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88801bef6148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
#1: ffffc9000ba7fc60 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc9000ba7fc60 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
#2: ffffffff900eb090 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x17c/0xd60 net/core/net_namespace.c:608
#3: ffffffff900f7cc8 (rtnl_mutex){+.+.}-{4:4}, at: cleanup_net+0x6c1/0xd60 net/core/net_namespace.c:644
#4: ffffffff8ed40a78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline]
#4: ffffffff8ed40a78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x454/0x830 kernel/rcu/tree_exp.h:998
1 lock held by syz.4.273/7040:
#0: ffff88805564e0e0 (&type->s_umount_key#54){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805564e0e0 (&type->s_umount_key#54){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.2.526/8097:
#0: ffffffff900f7cc8 (rtnl_mutex){+.+.}-{4:4}, at: tun_detach drivers/net/tun.c:633 [inline]
#0: ffffffff900f7cc8 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x3b/0x1b0 drivers/net/tun.c:3390
1 lock held by udevadm/8106:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-syzkaller-11270-g08733088b566 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x4ab/0x4e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7b9/0x940 kernel/kthread.c:464
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5832 Comm: syz-executor Not tainted 6.14.0-syzkaller-11270-g08733088b566 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:rb_next+0xd2/0xf0 lib/rbtree.c:517
Code: 38 00 74 08 4c 89 e7 e8 5c 10 03 f6 49 8b 1c 24 48 83 e3 fc 0f 84 75 ff ff ff 48 8d 7b 08 48 89 f8 48 c1 e8 03 42 80 3c 38 00 <74> c1 e8 37 10 03 f6 eb ba 49 89 de e9 54 ff ff ff 66 66 66 66 2e
RSP: 0018:ffffc90003fc7808 EFLAGS: 00000046
RAX: 1ffff1100631e783 RBX: ffff8880318f3c10 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: ffff88802cefda80 RDI: ffff8880318f3c18
RBP: ffff8880b8739c10 R08: ffff8880b873a92f R09: ffff8880b873a920
R10: dffffc0000000000 R11: ffffffff81952f80 R12: ffff88802cefda90
R13: ffff8880b8739bc0 R14: 0000000000000000 R15: dffffc0000000000
FS: 000055555fccb500(0000) GS:ffff8881250ac000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe2f477c440 CR3: 000000005dd32000 CR4: 0000000000350ef0
Call Trace:
rb_erase_augmented_cached include/linux/rbtree_augmented.h:339 [inline]
__dequeue_entity+0x50/0xd30 kernel/sched/fair.c:861
set_next_entity+0xf9/0x530 kernel/sched/fair.c:5545
set_next_task_fair+0x7c/0x410 kernel/sched/fair.c:13304
put_prev_set_next_task kernel/sched/sched.h:2472 [inline]
pick_next_task kernel/sched/core.c:6327 [inline]
__schedule+0x4903/0x5240 kernel/sched/core.c:6720
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
do_nanosleep+0x1a3/0x660 kernel/time/hrtimer.c:2131
hrtimer_nanosleep+0x1ee/0x410 kernel/time/hrtimer.c:2178
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1407 [inline]
__se_sys_clock_nanosleep+0x362/0x3c0 kernel/time/posix-timers.c:1384
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1d5abbfa25
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 54 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f 55 ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007fff0ff085b0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000104 RCX: 00007f1d5abbfa25
RDX: 00007fff0ff085f0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fff0ff0865c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000065
R13: 000000000000001d R14: 000000000003ccef R15: 00007fff0ff086b0