INFO: task syz-executor.2:6320 blocked for more than 145 seconds.
      Not tainted 6.3.0-rc6-syzkaller-g7920df21c1b7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:0     pid:6320  ppid:6032   flags:0x00000009
Call trace:
 __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556
 context_switch kernel/sched/core.c:5307 [inline]
 __schedule+0x1048/0x1e38 kernel/sched/core.c:6625
 schedule+0xc4/0x170 kernel/sched/core.c:6701
 io_schedule+0x8c/0x120 kernel/sched/core.c:8887
 bit_wait_io+0x1c/0xac kernel/sched/wait_bit.c:209
 __wait_on_bit_lock+0xcc/0x1e8 kernel/sched/wait_bit.c:90
 out_of_line_wait_on_bit_lock+0x194/0x21c kernel/sched/wait_bit.c:117
 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline]
 __lock_buffer fs/buffer.c:70 [inline]
 lock_buffer+0xf8/0x14c include/linux/buffer_head.h:400
 __sync_dirty_buffer+0x6c/0x300 fs/buffer.c:2780
 sync_dirty_buffer+0x24/0x34 fs/buffer.c:2806
 __ext4_handle_dirty_metadata+0x188/0x714 fs/ext4/ext4_jbd2.c:387
 ext4_convert_inline_data_nolock+0x66c/0xbc4 fs/ext4/inline.c:1254
 ext4_convert_inline_data+0x38c/0x50c fs/ext4/inline.c:2065
 ext4_page_mkwrite+0x198/0x1124 fs/ext4/inode.c:6235
 do_page_mkwrite+0x144/0x37c mm/memory.c:2925
 wp_page_shared mm/memory.c:3274 [inline]
 do_wp_page+0x364/0x2898 mm/memory.c:3356
 handle_pte_fault mm/memory.c:4941 [inline]
 __handle_mm_fault mm/memory.c:5065 [inline]
 handle_mm_fault+0x1b24/0x3dec mm/memory.c:5211
 __do_page_fault arch/arm64/mm/fault.c:512 [inline]
 do_page_fault+0x634/0xac4 arch/arm64/mm/fault.c:612
 do_mem_abort+0x74/0x200 arch/arm64/mm/fault.c:831
 el0_da+0x70/0x184 arch/arm64/kernel/entry-common.c:515
 el0t_64_sync_handler+0xcc/0xf0 arch/arm64/kernel/entry-common.c:658
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffff800015e4f0d0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
 #0: ffff800015e4f8d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
 #0: ffff800015e4ef00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:326
4 locks held by kworker/u4:2/39:
1 lock held by udevd/5520:
2 locks held by getty/5673:
 #0: ffff0000d8d20098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80001aac02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 drivers/tty/n_tty.c:2177
3 locks held by syz-fuzzer/6156:
4 locks held by syz-executor.2/6320:
 #0: ffff0000da825e88 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
 #0: ffff0000da825e88 (&mm->mmap_lock){++++}-{3:3}, at: do_page_fault+0x2dc/0xac4 arch/arm64/mm/fault.c:593
 #1: ffff0000d4ae2558 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1477 [inline]
 #1: ffff0000d4ae2558 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1581 [inline]
 #1: ffff0000d4ae2558 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x168/0x1124 fs/ext4/inode.c:6230
 #2: ffff0001330d69f0 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline]
 #2: ffff0001330d69f0 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_page_mkwrite+0x190/0x1124 fs/ext4/inode.c:6233
 #3: ffff0001330d6518 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
 #3: ffff0001330d6518 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x2dc/0x50c fs/ext4/inline.c:2063
1 lock held by udevd/6483:
1 lock held by syz-executor.1/9849:
1 lock held by syz-executor.2/9870:

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