INFO: task syz.1.155:8067 blocked for more than 143 seconds.
      Not tainted 6.16.0-rc7-syzkaller-g82af5ea7c611 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.155       state:D stack:0     pid:8067  tgid:7954  ppid:6564   task_flags:0x440140 flags:0x00000019
Call trace:
 __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T)
 context_switch kernel/sched/core.c:5397 [inline]
 __schedule+0x141c/0x2a14 kernel/sched/core.c:6786
 __schedule_loop kernel/sched/core.c:6864 [inline]
 schedule+0xb4/0x230 kernel/sched/core.c:6879
 __closure_sync+0x160/0x278 lib/closure.c:146
 closure_sync include/linux/closure.h:195 [inline]
 __bch2_wait_on_allocator+0x19c/0x214 fs/bcachefs/alloc_foreground.c:1682
 bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:315 [inline]
 __bch2_write+0x2874/0x2e78 fs/bcachefs/io_write.c:1593
 bch2_write+0x73c/0x106c fs/bcachefs/io_write.c:1722
 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:486 [inline]
 bch2_writepages+0x1e4/0x294 fs/bcachefs/fs-io-buffered.c:668
 do_writepages+0x270/0x468 mm/page-writeback.c:2636
 filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
 __filemap_fdatawrite_range mm/filemap.c:419 [inline]
 filemap_write_and_wait_range+0x1ac/0x29c mm/filemap.c:691
 bchfs_truncate+0x55c/0xa40 fs/bcachefs/fs-io.c:-1
 bch2_setattr+0x198/0x20c fs/bcachefs/fs.c:1241
 notify_change+0x9a4/0xc50 fs/attr.c:552
 do_truncate+0x198/0x210 fs/open.c:68
 vfs_truncate+0x398/0x444 fs/open.c:118
 do_sys_truncate+0xe4/0x1a8 fs/open.c:141
 __do_sys_truncate fs/open.c:153 [inline]
 __se_sys_truncate fs/open.c:151 [inline]
 __arm64_sys_truncate+0x5c/0x74 fs/open.c:151
 __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+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

Showing all locks held in the system:
1 lock held by khungtaskd/32:
 #0: ffff80008f869980 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330
2 locks held by getty/6294:
 #0: ffff0000d20b50a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80009ba3e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222
4 locks held by kworker/u8:9/6879:
2 locks held by syz.1.155/8067:
 #0: ffff0000d32cc428 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:557
 #1: ffff0000f39388e0 (&sb->s_type->i_mutex_key#26){++++}-{4:4}, at: inode_lock_killable include/linux/fs.h:874 [inline]
 #1: ffff0000f39388e0 (&sb->s_type->i_mutex_key#26){++++}-{4:4}, at: do_truncate+0x164/0x210 fs/open.c:63

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