INFO: task syz-executor:5832 blocked for more than 144 seconds.
Not tainted 6.12.0-rc6-next-20241108-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:19888 pid:5832 tgid:5832 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6753
__schedule_loop kernel/sched/core.c:6830 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6845
bch2_fs_read_only+0xae8/0x1270 fs/bcachefs/super.c:347
__bch2_fs_stop+0x105/0x5c0 fs/bcachefs/super.c:622
generic_shutdown_super+0x139/0x2d0 fs/super.c:642
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2292
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: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/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6ad957fa47
RSP: 002b:00007fff08ed8418 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6ad957fa47
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff08ed84d0
RBP: 00007fff08ed84d0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff08ed9550
R13: 00007f6ad95f123c R14: 0000000000025f09 R15: 00007fff08ed9590
INFO: task kworker/1:5:5877 blocked for more than 145 seconds.
Not tainted 6.12.0-rc6-next-20241108-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:5 state:D stack:16944 pid:5877 tgid:5877 ppid:2 flags:0x00004000
Workqueue: bcachefs_write_ref bch2_delete_dead_snapshots_work (bcachefs-delete-dead-snapshots/)
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6753
__schedule_loop kernel/sched/core.c:6830 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6845
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
__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:1754
bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:239 [inline]
bch2_btree_update_start+0x11a5/0x14e0 fs/bcachefs/btree_update_interior.c:1263
bch2_btree_split_leaf+0x121/0x880 fs/bcachefs/btree_update_interior.c:1857
bch2_trans_commit_error+0x212/0x1390 fs/bcachefs/btree_trans_commit.c:918
__bch2_trans_commit+0x8069/0x9610 fs/bcachefs/btree_trans_commit.c:1099
bch2_trans_commit fs/bcachefs/btree_update.h:182 [inline]
bch2_delete_dead_snapshots+0x19b6/0x5ae0 fs/bcachefs/snapshot.c:1655
bch2_delete_dead_snapshots_work+0x34/0x40 fs/bcachefs/snapshot.c:1730
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
INFO: task bch-reclaim/loo:7427 blocked for more than 145 seconds.
Not tainted 6.12.0-rc6-next-20241108-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-reclaim/loo state:D stack:20816 pid:7427 tgid:7427 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6753
__schedule_loop kernel/sched/core.c:6830 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6845
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
__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:1754
bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:239 [inline]
bch2_btree_update_start+0x11a5/0x14e0 fs/bcachefs/btree_update_interior.c:1263
bch2_btree_split_leaf+0x121/0x880 fs/bcachefs/btree_update_interior.c:1857
bch2_trans_commit_error+0x212/0x1390 fs/bcachefs/btree_trans_commit.c:918
__bch2_trans_commit+0x8069/0x9610 fs/bcachefs/btree_trans_commit.c:1099
bch2_trans_commit fs/bcachefs/btree_update.h:182 [inline]
bch2_btree_write_buffer_flush_locked+0x4f72/0x5a40 fs/bcachefs/btree_write_buffer.c:429
btree_write_buffer_flush_seq+0x1a43/0x1bc0 fs/bcachefs/btree_write_buffer.c:510
bch2_btree_write_buffer_journal_flush+0x4e/0x80 fs/bcachefs/btree_write_buffer.c:525
journal_flush_pins+0x5f7/0xb20 fs/bcachefs/journal_reclaim.c:565
__bch2_journal_reclaim+0x789/0xdc0 fs/bcachefs/journal_reclaim.c:698
bch2_journal_reclaim_thread+0x17a/0x570 fs/bcachefs/journal_reclaim.c:740
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
INFO: task bch-copygc/loop:7438 blocked for more than 146 seconds.
Not tainted 6.12.0-rc6-next-20241108-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-copygc/loop state:D stack:18616 pid:7438 tgid:7438 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6753
__schedule_loop kernel/sched/core.c:6830 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6845
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
__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:1754
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:421
move_write fs/bcachefs/move.c:134 [inline]
bch2_moving_ctxt_do_pending_writes+0x44c/0x8d0 fs/bcachefs/move.c:165
bch2_move_ratelimit+0x76c/0xeb0 fs/bcachefs/move.c:501
bch2_evacuate_bucket+0x26ca/0x3630 fs/bcachefs/move.c:711
bch2_copygc+0x42c9/0x4ca0 fs/bcachefs/movinggc.c:240
bch2_copygc_thread+0x6ef/0xba0 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
INFO: task syz.2.392:7510 blocked for more than 147 seconds.
Not tainted 6.12.0-rc6-next-20241108-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.392 state:D stack:23232 pid:7510 tgid:7509 ppid:5823 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6753
__schedule_loop kernel/sched/core.c:6830 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6845
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6902
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1526
__super_lock fs/super.c:58 [inline]
super_lock+0x27c/0x400 fs/super.c:120
super_lock_shared fs/super.c:139 [inline]
iterate_supers+0x8c/0x190 fs/super.c:931
ksys_sync+0xbd/0x1c0 fs/sync.c:102
__do_sys_sync+0xe/0x20 fs/sync.c:113
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0c4d17e719
RSP: 002b:00007f0c4dfc0038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f0c4d335f80 RCX: 00007f0c4d17e719
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f0c4d1f139e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0c4d335f80 R15: 00007fff0bb3eb98
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e93c560 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e93c560 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e93c560 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
3 locks held by kworker/u8:3/51:
#0: ffff8880b863e798 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
#1: ffff8880b8628948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987
#2: ffffffff9a60f0b8 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x17f/0x580 lib/debugobjects.c:818
1 lock held by klogd/5190:
#0: ffff8880b863e798 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
2 locks held by getty/5588:
#0: ffff8880318fb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/5832:
#0: ffff88807d02c0e0 (&type->s_umount_key#114){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88807d02c0e0 (&type->s_umount_key#114){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88807d02c0e0 (&type->s_umount_key#114){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffff88804d800278 (&c->state_lock){+.+.}-{4:4}, at: __bch2_fs_stop+0xfd/0x5c0 fs/bcachefs/super.c:621
4 locks held by kworker/1:5/5877:
#0: ffff888070030d48 ((wq_completion)bcachefs_write_ref){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff888070030d48 ((wq_completion)bcachefs_write_ref){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90004047d00 ((work_completion)(&c->snapshot_delete_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90004047d00 ((work_completion)(&c->snapshot_delete_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffff88804d8043a8 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:158 [inline]
#2: ffff88804d8043a8 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:255 [inline]
#2: ffff88804d8043a8 (&c->btree_trans_barrier){.+.+}-{0:0}, at: bch2_trans_srcu_lock+0x9a/0x1a0 fs/bcachefs/btree_iter.c:3195
#3: ffff88804d826710 (&c->gc_lock){.+.+}-{4:4}, at: bch2_btree_update_start+0x682/0x14e0 fs/bcachefs/btree_update_interior.c:1191
4 locks held by bch-reclaim/loo/7427:
#0: ffff88804d84b128 (&j->reclaim_lock){+.+.}-{4:4}, at: bch2_journal_reclaim_thread+0x16d/0x570 fs/bcachefs/journal_reclaim.c:739
#1: ffff88804d8043a8 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:158 [inline]
#1: ffff88804d8043a8 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:255 [inline]
#1: ffff88804d8043a8 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7e4/0xd30 fs/bcachefs/btree_iter.c:3378
#2: ffff88804d804750 (&wb->flushing.lock){+.+.}-{4:4}, at: btree_write_buffer_flush_seq+0x1a39/0x1bc0 fs/bcachefs/btree_write_buffer.c:509
#3: ffff88804d826710 (&c->gc_lock){.+.+}-{4:4}, at: bch2_btree_update_start+0x682/0x14e0 fs/bcachefs/btree_update_interior.c:1191
1 lock held by syz.2.392/7510:
#0: ffff88807d02c0e0 (&type->s_umount_key#114){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88807d02c0e0 (&type->s_umount_key#114){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.4.583/8213:
#0: ffff88807d02c0e0 (&type->s_umount_key#114){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88807d02c0e0 (&type->s_umount_key#114){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.4.583/8223:
#0: ffff88807d02c0e0 (&type->s_umount_key#114){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88807d02c0e0 (&type->s_umount_key#114){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.4.583/8225:
#0: ffff88807d02c0e0 (&type->s_umount_key#114){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88807d02c0e0 (&type->s_umount_key#114){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc6-next-20241108-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
__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:234 [inline]
watchdog+0xffb/0x1040 kernel/hung_task.c:397
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
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 51 Comm: kworker/u8:3 Not tainted 6.12.0-rc6-next-20241108-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:3797 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3817 [inline]
RIP: 0010:validate_chain+0x1b9/0x5920 kernel/locking/lockdep.c:3872
Code: b8 eb 83 b5 80 46 86 c8 61 49 0f af c6 48 c1 e8 2d 48 8d 1c c5 c0 87 e2 93 48 89 d8 48 c1 e8 03 48 89 44 24 68 42 80 3c 20 00 <74> 08 48 89 df e8 4d 9a 8e 00 48 89 5c 24 48 48 8b 1b 48 85 db 74
RSP: 0018:ffffc90000bb7200 EFLAGS: 00000046
RAX: 1ffffffff2833521 RBX: ffffffff9419a908 RCX: ffffffff817b5b3e
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942b8880
RBP: ffffc90000bb7500 R08: ffffffff942b8887 R09: 1ffffffff2857110
R10: dffffc0000000000 R11: fffffbfff2857111 R12: dffffc0000000000
R13: ffff888021abc7a0 R14: 0925a2fabd5d1cd2 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555e27d608 CR3: 0000000033f60000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
get_partial_node+0x36/0x2a0 mm/slub.c:2823
get_partial mm/slub.c:2937 [inline]
___slab_alloc+0xc17/0x14b0 mm/slub.c:3795
__slab_alloc+0x58/0xa0 mm/slub.c:3905
__slab_alloc_node mm/slub.c:3980 [inline]
slab_alloc_node mm/slub.c:4141 [inline]
__do_kmalloc_node mm/slub.c:4282 [inline]
__kmalloc_node_track_caller_noprof+0x2e9/0x4c0 mm/slub.c:4302
kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:609
__alloc_skb+0x1f3/0x440 net/core/skbuff.c:678
alloc_skb include/linux/skbuff.h:1322 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
nsim_dev_trap_report_work+0x261/0xb50 drivers/net/netdevsim/dev.c:851
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