syzbot

INFO: task syz-executor.2:11156 blocked for more than 143 seconds.
      Not tainted 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:0     pid:11156 ppid:6004   flags:0x00000009
Call trace:
 __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556
 context_switch kernel/sched/core.c:5307 [inline]
 __schedule+0x103c/0x1e2c 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_handle_dirty_dirblock+0x2d0/0x5c0 fs/ext4/namei.c:438
 ext4_finish_convert_inline_dir+0x4d0/0x684 fs/ext4/inline.c:1180
 ext4_convert_inline_data_nolock+0x5c4/0xbc4 fs/ext4/inline.c:1257
 ext4_try_add_inline_entry+0x928/0xd90 fs/ext4/inline.c:1330
 ext4_add_entry+0x430/0xcc8 fs/ext4/namei.c:2384
 ext4_add_nondir+0x98/0x22c fs/ext4/namei.c:2771
 ext4_create+0x314/0x480 fs/ext4/namei.c:2816
 lookup_open fs/namei.c:3416 [inline]
 open_last_lookups fs/namei.c:3484 [inline]
 path_openat+0xf80/0x27f8 fs/namei.c:3712
 do_filp_open+0x1bc/0x3cc fs/namei.c:3742
 do_sys_openat2+0x128/0x3d8 fs/open.c:1348
 do_sys_open fs/open.c:1364 [inline]
 __do_sys_openat fs/open.c:1380 [inline]
 __se_sys_openat fs/open.c:1375 [inline]
 __arm64_sys_openat+0x1f0/0x240 fs/open.c:1375
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 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: ffff800015f3f4d0 (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: ffff800015f3fcd0 (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: ffff800015f3f300 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:326
2 locks held by getty/5683:
 #0: ffff0000d488a098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80001ac902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 drivers/tty/n_tty.c:2177
2 locks held by kworker/u4:10/7625:
 #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x664/0x12d4 kernel/workqueue.c:2363
 #1: ffff80001f5f7c20 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x12d4 kernel/workqueue.c:2365
3 locks held by syz-executor.2/11156:
 #0: ffff0001361b2460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:394
 #1: ffff0001355a7258 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #1: ffff0001355a7258 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: open_last_lookups fs/namei.c:3481 [inline]
 #1: ffff0001355a7258 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: path_openat+0x5f0/0x27f8 fs/namei.c:3712
 #2: ffff0001355a6f20 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
 #2: ffff0001355a6f20 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_add_inline_entry+0xdc/0xd90 fs/ext4/inline.c:1288
1 lock held by syz-executor.0/17510:
 #0: ffff00013df1ac10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #0: ffff00013df1ac10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:652 [inline]
 #0: ffff00013df1ac10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x80/0x1fc net/socket.c:1395
2 locks held by syz-executor.1/17514:
 #0: ffff800018632108 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline]
 #0: ffff800018632108 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x700/0xdb8 net/core/rtnetlink.c:6178
 #1: ffff800015f44778 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
 #1: ffff800015f44778 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3ac/0x728 kernel/rcu/tree_exp.h:989
1 lock held by syz-executor.1/17520:
 #0: ffff800018632108 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline]
 #0: ffff800018632108 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x700/0xdb8 net/core/rtnetlink.c:6178
1 lock held by syz-executor.5/17525:

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