INFO: task syz.0.41:6241 blocked for more than 143 seconds.
      Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.41        state:D stack:15984 pid:6241  tgid:6240  ppid:5833   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0x185a/0x4b70 kernel/sched/core.c:6690
 __schedule_loop kernel/sched/core.c:6767 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6782
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839
 rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
 __down_write_common kernel/locking/rwsem.c:1304 [inline]
 __down_write kernel/locking/rwsem.c:1313 [inline]
 down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
 inode_lock include/linux/fs.h:815 [inline]
 vfs_unlink+0xe4/0x650 fs/namei.c:4458
 do_unlinkat+0x4ae/0x830 fs/namei.c:4533
 __do_sys_unlinkat fs/namei.c:4576 [inline]
 __se_sys_unlinkat fs/namei.c:4569 [inline]
 __x64_sys_unlinkat+0xcc/0xf0 fs/namei.c:4569
 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: 0033:0x7f795c57e719
RSP: 002b:00007f795d375038 EFLAGS: 00000246 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 00007f795c735f80 RCX: 00007f795c57e719
RDX: 0000000000000000 RSI: 0000000020000380 RDI: ffffffffffffff9c
RBP: 00007f795c5f132e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f795c735f80 R15: 00007ffc35b22778
 </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/u8:2/35:
 #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: ffffc90000ab7d00 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc90000ab7d00 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
2 locks held by getty/5582:
 #0: ffff8880352820a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by syz.0.41/6241:
 #0: ffff88807ee76420 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
 #1: ffff888054eb8148 (&sb->s_type->i_mutex_key#28/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline]
 #1: ffff888054eb8148 (&sb->s_type->i_mutex_key#28/1){+.+.}-{3:3}, at: do_unlinkat+0x26a/0x830 fs/namei.c:4520
 #2: ffff888054eb88c8 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
 #2: ffff888054eb88c8 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: vfs_unlink+0xe4/0x650 fs/namei.c:4458
5 locks held by syz.0.41/6289:
 #0: ffff88807ee76420 (sb_writers#22){.+.+}-{0:0}, at: do_ftruncate+0x28b/0x580 fs/open.c:178
 #1: ffff888054eb88c8 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
 #1: ffff888054eb88c8 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: do_truncate fs/open.c:63 [inline]
 #1: ffff888054eb88c8 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: do_ftruncate+0x44e/0x580 fs/open.c:181
 #2: ffff88805ce00a38 (&c->snapshot_create_lock){.+.+}-{3:3}, at: bch2_truncate+0x166/0x2d0 fs/bcachefs/io_misc.c:292
 #3: ffff88805ce04398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
 #3: ffff88805ce04398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
 #3: ffff88805ce04398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7de/0xd20 fs/bcachefs/btree_iter.c:3215
 #4: ffff88805ce266d0 (&c->gc_lock){.+.+}-{3:3}, at: bch2_btree_update_start+0x682/0x14e0 fs/bcachefs/btree_update_interior.c:1202

=============================================

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5185 Comm: syslogd Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:lock_is_held_type+0x9/0x190 kernel/locking/lockdep.c:5882
Code: e8 2c fc ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 <41> 55 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24
RSP: 0018:ffffc9000331f1c8 EFLAGS: 00000082
RAX: 0000000000000000 RBX: ffff88807b08bc00 RCX: ffffffff8165acb9
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8880b863ea58
RBP: 0000000000000000 R08: ffffffff901bd6af R09: 1ffffffff2037ad5
R10: dffffc0000000000 R11: fffffbfff2037ad6 R12: ffffffff8e309a50
R13: ffff8880b863ea58 R14: dffffc0000000000 R15: 1ffffffff1c6134a
FS:  00007fe20cb9a380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056035ac18d88 CR3: 00000000346d0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lock_is_held include/linux/lockdep.h:249 [inline]
 lockdep_assert_rq_held kernel/sched/sched.h:1496 [inline]
 cpuacct_charge+0xf8/0x330 kernel/sched/cpuacct.c:339
 cgroup_account_cputime include/linux/cgroup.h:716 [inline]
 update_curr_task+0xf3/0x370 kernel/sched/fair.c:1161
 update_curr+0x532/0xdb0 kernel/sched/fair.c:1237
 dequeue_entity+0x28/0x1a70 kernel/sched/fair.c:5480
 dequeue_entities+0x234/0xfa0 kernel/sched/fair.c:7107
 dequeue_task_fair+0xdc/0x1e0 kernel/sched/fair.c:7196
 block_task kernel/sched/core.c:2090 [inline]
 __schedule+0x5e8/0x4b70 kernel/sched/core.c:6638
 __schedule_loop kernel/sched/core.c:6767 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6782
 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2591
 __skb_wait_for_more_packets+0x399/0x600 net/core/datagram.c:121
 __unix_dgram_recvmsg+0x34a/0x12f0 net/unix/af_unix.c:2448
 sock_recvmsg_nosec net/socket.c:1051 [inline]
 sock_recvmsg+0x22f/0x280 net/socket.c:1073
 sock_read_iter+0x2c4/0x3d0 net/socket.c:1143
 new_sync_read fs/read_write.c:488 [inline]
 vfs_read+0x991/0xb70 fs/read_write.c:569
 ksys_read+0x183/0x2b0 fs/read_write.c:712
 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: 0033:0x7fe20cceeb6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff648617d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fe20cceeb6a
RDX: 00000000000000ff RSI: 000055d487853950 RDI: 0000000000000000
RBP: 000055d487853910 R08: 0000000000000001 R09: 0000000000000000
R10: 00007fe20ce8d3a3 R11: 0000000000000246 R12: 000055d48785399d
R13: 000055d487853950 R14: 0000000000000000 R15: 00007fe20ced1a80
 </TASK>