INFO: task syz.0.213:7295 blocked for more than 143 seconds.
      Not tainted 6.13.0-rc2-syzkaller-gfac04efc5c79 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.213       state:D stack:0     pid:7295  tgid:7264  ppid:6417   flags:0x00000001
Call trace:
 __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T)
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1744/0x27f0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xbc/0x238 kernel/sched/core.c:6848
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6905
 rwsem_down_write_slowpath+0xd10/0x14c8 kernel/locking/rwsem.c:1176
 __down_write_common kernel/locking/rwsem.c:1304 [inline]
 __down_write kernel/locking/rwsem.c:1313 [inline]
 down_write+0xb4/0xc0 kernel/locking/rwsem.c:1578
 inode_lock include/linux/fs.h:818 [inline]
 bch2_write_iter+0x110/0x2304 fs/bcachefs/fs-io-buffered.c:1040
 __kernel_write_iter+0x340/0x794 fs/read_write.c:612
 __kernel_write+0x11c/0x174 fs/read_write.c:632
 do_acct_process+0xf20/0x1790 kernel/acct.c:539
 acct_pin_kill+0x34/0x180 kernel/acct.c:192
 pin_kill+0x288/0x53c fs/fs_pin.c:44
 __do_sys_acct kernel/acct.c:309 [inline]
 __se_sys_acct kernel/acct.c:291 [inline]
 __arm64_sys_acct+0x290/0x6a0 kernel/acct.c:291
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffff80008fb62560 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336
2 locks held by klogd/6022:
2 locks held by getty/6170:
 #0: ffff0000d26350a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80009b9be2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/6417:
 #0: ffff0000d705a100 (&acct->lock#3){+.+.}-{4:4}, at: acct_get kernel/acct.c:179 [inline]
 #0: ffff0000d705a100 (&acct->lock#3){+.+.}-{4:4}, at: slow_acct_process+0x228/0x4b8 kernel/acct.c:595
5 locks held by syz.0.213/7265:
 #0: ffff0000d6aaa420 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:515
 #1: ffff0000f7269048 (&sb->s_type->i_mutex_key#32){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
 #1: ffff0000f7269048 (&sb->s_type->i_mutex_key#32){++++}-{4:4}, at: do_truncate+0x1ac/0x28c fs/open.c:63
 #2: ffff0000f6d80a38 (&c->snapshot_create_lock){.+.+}-{4:4}, at: bch2_truncate+0x134/0x298 fs/bcachefs/io_misc.c:292
 #3: ffff0000f6d84398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:157
 #4: ffff0000f6da66d0 (&c->gc_lock){.+.+}-{4:4}, at: bch2_btree_update_start+0x588/0x15ac fs/bcachefs/btree_update_interior.c:1197
3 locks held by syz.0.213/7295:
 #0: ffff0000d705a100 (&acct->lock#3){+.+.}-{4:4}, at: acct_pin_kill+0x2c/0x180 kernel/acct.c:191
 #1: ffff0000d6aaa420 (sb_writers#27){.+.+}-{0:0}, at: acct_pin_kill+0x34/0x180 kernel/acct.c:192
 #2: ffff0000f7269048 (&sb->s_type->i_mutex_key#32){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
 #2: ffff0000f7269048 (&sb->s_type->i_mutex_key#32){++++}-{4:4}, at: bch2_write_iter+0x110/0x2304 fs/bcachefs/fs-io-buffered.c:1040

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