INFO: task kworker/u4:16:4949 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:16 state:D stack:0 pid:4949 ppid:2 flags:0x00000008 Workqueue: nvme-wq nvme_scan_work Call trace: __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5246 [inline] __schedule+0xdb4/0x1a6c kernel/sched/core.c:6563 schedule+0xc4/0x170 kernel/sched/core.c:6639 blk_mq_freeze_queue_wait+0xe8/0x170 block/blk-mq.c:181 blk_freeze_queue+0xc0/0xf4 block/blk-mq.c:208 blk_mq_freeze_queue+0x20/0x30 block/blk-mq.c:217 nvme_update_ns_info_block+0x1fc/0x15a0 drivers/nvme/host/core.c:2086 nvme_update_ns_info+0x88/0x520 drivers/nvme/host/core.c:-1 nvme_validate_ns drivers/nvme/host/core.c:4516 [inline] nvme_scan_ns+0xc88/0x2da8 drivers/nvme/host/core.c:4566 nvme_scan_ns_sequential drivers/nvme/host/core.c:4648 [inline] nvme_scan_work+0x7a4/0xd34 drivers/nvme/host/core.c:4709 process_one_work+0x7e4/0x13bc kernel/workqueue.c:2292 worker_thread+0x8cc/0xfe8 kernel/workqueue.c:2439 kthread+0x254/0x2e0 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850 Showing all locks held in the system: 4 locks held by kworker/u4:0/9: #0: ffff0000c2c10938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff80001dbf7c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 #2: ffff0000d96d80e0 (&type->s_umount_key#30){++++}-{3:3}, at: trylock_super+0x24/0xf4 fs/super.c:415 #3: ffff0000d96dac18 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x1b0/0x28fc fs/ext4/inode.c:2717 1 lock held by rcu_tasks_kthre/12: #0: ffff8000165f7e70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xc48 kernel/rcu/tasks.h:517 1 lock held by rcu_tasks_trace/13: #0: ffff8000165f8690 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xc48 kernel/rcu/tasks.h:517 1 lock held by khungtaskd/28: #0: ffff8000165f7500 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 2 locks held by getty/4085: #0: ffff0000d78ba098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800021a1e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2e8/0xfa8 drivers/tty/n_tty.c:2198 3 locks held by syz-executor/4317: #0: ffff0000d19e0148 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff0000d19e0148 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5320 [inline] #0: ffff0000d19e0148 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x38/0x2e0 mm/memory.c:5382 #1: ffff0000d96d8558 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1897 [inline] #1: ffff0000d96d8558 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:2001 [inline] #1: ffff0000d96d8558 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x168/0x10b0 fs/ext4/inode.c:6283 #2: ffff0000d96de990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfec/0x125c fs/jbd2/transaction.c:461 3 locks held by kworker/u4:13/4945: 3 locks held by kworker/u4:16/4949: #0: ffff0000d033b138 ((wq_completion)nvme-wq){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff800022f57c40 ((work_completion)(&ctrl->scan_work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 #2: ffff0000ce6cc440 (&ctrl->scan_lock){+.+.}-{3:3}, at: nvme_scan_work+0x2fc/0xd34 drivers/nvme/host/core.c:4707 2 locks held by kworker/u4:17/4950: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff800022f67c40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 2 locks held by rm/5823: #0: ffff0000d96d8460 (sb_writers#3){.+.+}-{0:0}, at: pick_link+0x408/0xbc8 fs/namei.c:1792 #1: ffff0000d96de990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfec/0x125c fs/jbd2/transaction.c:461 3 locks held by syz.2.390/5826: #0: ffff0000cd039f48 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff0000cd039f48 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5320 [inline] #0: ffff0000cd039f48 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x38/0x2e0 mm/memory.c:5382 #1: ffff0000d96d8558 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1897 [inline] #1: ffff0000d96d8558 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:2001 [inline] #1: ffff0000d96d8558 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x168/0x10b0 fs/ext4/inode.c:6283 #2: ffff0000d96de990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfec/0x125c fs/jbd2/transaction.c:461 3 locks held by kworker/u4:17/5827: #0: ffff0000d472f150 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1506 [inline] #0: ffff0000d472f150 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xb8/0x1588 fs/exec.c:1848 #1: ffff0000d96d8460 (sb_writers#3){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2606 [inline] #1: ffff0000d96d8460 (sb_writers#3){.+.+}-{0:0}, at: filemap_read+0x1ec4/0x20dc mm/filemap.c:2836 #2: ffff0000d96de990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfec/0x125c fs/jbd2/transaction.c:461 =============================================