INFO: task syz-executor:6498 blocked for more than 144 seconds. Not tainted 6.15.0-rc5-syzkaller-gc32f8dc5aaf9 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6498 tgid:6498 ppid:6484 task_flags:0x400140 flags:0x00000018 Call trace: __switch_to+0x414/0x834 arch/arm64/kernel/process.c:734 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x13b0/0x28d4 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6860 io_schedule+0x84/0xf0 kernel/sched/core.c:7742 bit_wait_io+0x1c/0xac kernel/sched/wait_bit.c:247 __wait_on_bit kernel/sched/wait_bit.c:49 [inline] out_of_line_wait_on_bit+0x158/0x1f0 kernel/sched/wait_bit.c:64 wait_on_bit_io include/linux/wait_bit.h:105 [inline] __wait_on_buffer fs/buffer.c:123 [inline] wait_on_buffer include/linux/buffer_head.h:422 [inline] __sync_dirty_buffer+0x204/0x304 fs/buffer.c:2875 nilfs_sync_super fs/nilfs2/super.c:186 [inline] nilfs_commit_super+0x3a4/0x864 fs/nilfs2/super.c:302 nilfs_cleanup_super+0x2ac/0x368 fs/nilfs2/super.c:335 nilfs_put_super+0x8c/0x12c fs/nilfs2/super.c:513 generic_shutdown_super+0x12c/0x2b8 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1710 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1435 __cleanup_mnt+0x20/0x30 fs/namespace.c:1442 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x16c/0x1ec arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xb4/0x17c arch/arm64/kernel/entry-common.c:768 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 1 lock held by kthreadd/2: 3 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/14: 1 lock held by khungtaskd/32: #0: ffff80008f4f88a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 3 locks held by kworker/u8:2/44: 3 locks held by kworker/u8:3/45: 1 lock held by pr/ttyAMA0/46: 3 locks held by kworker/u8:4/157: 3 locks held by kworker/u8:5/305: 7 locks held by kworker/u8:6/638: 3 locks held by kworker/u8:7/2218: 3 locks held by kworker/R-ipv6_/4139: #0: ffff0000d2c34948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a0e67ba0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80009247ace8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by kworker/R-bat_e/4220: 6 locks held by kworker/u8:8/4386: 1 lock held by klogd/6093: 2 locks held by udevd/6104: 2 locks held by dhcpcd/6158: 3 locks held by dhcpcd/6159: 1 lock held by crond/6233: 2 locks held by getty/6254: #0: ffff0000d30c10a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b59e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa0 drivers/tty/n_tty.c:2222 1 lock held by syz-executor/6477: 2 locks held by udevd/6481: 1 lock held by syz-executor/6487: 2 locks held by kworker/0:3/6488: 1 lock held by syz-executor/6491: 3 locks held by syz-executor/6494: 2 locks held by syz-executor/6498: #0: ffff0000d32360e0 (&type->s_umount_key#65){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff0000d32360e0 (&type->s_umount_key#65){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff0000d32360e0 (&type->s_umount_key#65){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 #1: ffff0000daa97090 (&nilfs->ns_sem){++++}-{4:4}, at: nilfs_put_super+0x84/0x12c fs/nilfs2/super.c:512 3 locks held by syz-executor/6499: 2 locks held by kworker/0:4/6536: 4 locks held by kworker/0:5/6537: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a01d7bc0 (reg_work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80009247ace8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000d5f00768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6092 [inline] #3: ffff0000d5f00768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_process_self_managed_hints+0xc4/0x1c0 net/wireless/reg.c:3209 1 lock held by udevd/6601: #0: ffff0000c1542a30 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:877 [inline] #0: ffff0000c1542a30 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2a0/0x3dc block/fops.c:808 3 locks held by kworker/u8:9/6792: 3 locks held by kworker/u8:10/6793: =============================================