INFO: task syz-executor.5:8091 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.5 state:D stack:0 pid:8091 ppid:6042 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_convert_inline_data_nolock+0x66c/0xbc4 fs/ext4/inline.c:1254 ext4_convert_inline_data+0x38c/0x50c fs/ext4/inline.c:2065 ext4_fallocate+0x124/0x1c88 fs/ext4/extents.c:4701 vfs_fallocate+0x478/0x5b4 fs/open.c:324 ksys_fallocate fs/open.c:347 [inline] __do_sys_fallocate fs/open.c:355 [inline] __se_sys_fallocate fs/open.c:353 [inline] __arm64_sys_fallocate+0xc0/0x110 fs/open.c:353 __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: 4 locks held by kworker/u4:1/11: 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 2 locks held by kworker/0:1/14: #0: ffff0000c0021d38 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x664/0x12d4 kernel/workqueue.c:2363 #1: ffff80001a4e7c20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x12d4 kernel/workqueue.c:2365 1 lock held by khungtaskd/28: #0: ffff800015e4ef00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:326 2 locks held by getty/5669: #0: ffff0000d3a37098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001aae02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 drivers/tty/n_tty.c:2177 3 locks held by kworker/0:6/6105: #0: ffff0000c0020d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x664/0x12d4 kernel/workqueue.c:2363 #1: ffff80001e9a7c20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6a8/0x12d4 kernel/workqueue.c:2365 #2: ffff80001846dd48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:75 3 locks held by kworker/0:13/7344: #0: ffff0000c0020d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x664/0x12d4 kernel/workqueue.c:2363 #1: ffff800021ac7c20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6a8/0x12d4 kernel/workqueue.c:2365 #2: ffff80001846dd48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:75 3 locks held by kworker/u4:11/7549: 3 locks held by syz-executor.5/8091: #0: ffff0000fbbf2460 (sb_writers#3){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2505 [inline] #0: ffff0000fbbf2460 (sb_writers#3){.+.+}-{0:0}, at: vfs_fallocate+0x404/0x5b4 fs/open.c:323 #1: ffff00013172e850 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff00013172e850 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_fallocate+0x11c/0x1c88 fs/ext4/extents.c:4700 #2: ffff00013172e518 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff00013172e518 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x2dc/0x50c fs/ext4/inline.c:2063 6 locks held by syz-executor.5/9945: #0: ffff0000d8f74460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x244/0x914 fs/read_write.c:580 #1: ffff0000dcaec888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:325 #2: ffff0000cb72fbd0 (kn->active#46){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:326 #3: ffff8000177a36e8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x39c drivers/net/netdevsim/bus.c:209 #4: ffff000132d290e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #4: ffff000132d290e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1063 [inline] #4: ffff000132d290e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xbc/0x6a0 drivers/base/dd.c:1260 #5: ffff800018461fd0 (pernet_ops_rwsem){++++}-{3:3}, at: unregister_netdevice_notifier+0x98/0x3a4 net/core/dev.c:1759 =============================================