INFO: task syz-executor.5:7590 blocked for more than 143 seconds. Not tainted 6.3.0-rc5-syzkaller-g9a03cbd79d3a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:0 pid:7590 ppid:6024 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_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+0x58/0x168 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: ffff800015e5f250 (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: ffff800015e5fa50 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510 2 locks held by kworker/1:1/24: #0: ffff0000c0021d38 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x664/0x12d4 kernel/workqueue.c:2363 #1: ffff80001a597c20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x12d4 kernel/workqueue.c:2365 1 lock held by khungtaskd/28: #0: ffff800015e5f080 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:326 1 lock held by udevd/5519: 2 locks held by getty/5668: #0: ffff0000d9100098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001aad02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 drivers/tty/n_tty.c:2177 1 lock held by syz-executor.1/6039: #0: ffff800015e644f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline] #0: ffff800015e644f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3ac/0x728 kernel/rcu/tree_exp.h:989 3 locks held by syz-executor.5/7590: #0: ffff0000d33de460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:394 #1: ffff00012de79810 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff00012de79810 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: open_last_lookups fs/namei.c:3481 [inline] #1: ffff00012de79810 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: path_openat+0x5f0/0x27f8 fs/namei.c:3712 #2: ffff00012de794d8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff00012de794d8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_add_inline_entry+0xdc/0xd90 fs/ext4/inline.c:1288 2 locks held by syz-executor.0/10896: #0: ffff80001847dbc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline] #0: ffff80001847dbc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x700/0xdb8 net/core/rtnetlink.c:6171 #1: ffff800015e644f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #1: ffff800015e644f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x37c/0x728 kernel/rcu/tree_exp.h:989 2 locks held by syz-executor.0/10906: 1 lock held by syz-executor.2/10899: 2 locks held by syz-executor.3/10902: 3 locks held by syz-executor.5/10904: =============================================