INFO: task syz.0.31:6780 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.31        state:D stack:0     pid:6780  tgid:6779  ppid:6542   task_flags:0x400140 flags:0x00000011
Call trace:
 __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T)
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x13b0/0x2864 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0xb4/0x230 kernel/sched/core.c:7058
 bch2_fs_read_only+0x23c/0x960 fs/bcachefs/super.c:358
 bch2_fs_reconfigure+0x154/0x358 fs/bcachefs/fs.c:2671
 reconfigure_super+0x1d4/0x6f0 fs/super.c:1077
 do_remount fs/namespace.c:3324 [inline]
 path_mount+0xb34/0xde0 fs/namespace.c:4115
 do_mount fs/namespace.c:4136 [inline]
 __do_sys_mount fs/namespace.c:4347 [inline]
 __se_sys_mount fs/namespace.c:4324 [inline]
 __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4324
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 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+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 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: ffff80008fa49aa0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330
2 locks held by pr/ttyAMA-1/43:
2 locks held by getty/6325:
 #0: ffff0000d75e10a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff800099f5e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222
2 locks held by syz.0.31/6780:
 #0: ffff0000cdaba0e0 (&type->s_umount_key#52){++++}-{4:4}, at: do_remount fs/namespace.c:3321 [inline]
 #0: ffff0000cdaba0e0 (&type->s_umount_key#52){++++}-{4:4}, at: path_mount+0xafc/0xde0 fs/namespace.c:4115
 #1: ffff0000f8980278 (&c->state_lock){++++}-{4:4}, at: bch2_fs_reconfigure+0x12c/0x358 fs/bcachefs/fs.c:2668

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