INFO: task syz-executor:9902 blocked for more than 144 seconds. Not tainted 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:9902 tgid:9902 ppid:9894 task_flags:0x400140 flags:0x00000010 Call trace: __switch_to+0x404/0x778 arch/arm64/kernel/process.c:701 (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 xlog_wait+0x114/0x1a4 fs/xfs/xfs_log_priv.h:588 xlog_wait_on_iclog+0x2f8/0x56c fs/xfs/xfs_log.c:841 xlog_force_lsn+0x470/0x720 fs/xfs/xfs_log.c:3065 xfs_log_force_seq+0x1ec/0x4ac fs/xfs/xfs_log.c:3102 __xfs_trans_commit+0x73c/0xc2c fs/xfs/xfs_trans.c:905 xfs_trans_commit+0x13c/0x1c4 fs/xfs/xfs_trans.c:954 xfs_sync_sb+0xf4/0x15c fs/xfs/libxfs/xfs_sb.c:1375 xfs_log_cover fs/xfs/xfs_log.c:1215 [inline] xfs_log_quiesce+0x268/0x4e0 fs/xfs/xfs_log.c:1024 xfs_log_clean+0xa0/0x79c fs/xfs/xfs_log.c:1031 xfs_log_unmount+0x34/0x194 fs/xfs/xfs_log.c:1046 xfs_unmountfs+0x22c/0x310 fs/xfs/xfs_mount.c:1208 xfs_fs_put_super+0x6c/0x144 fs/xfs/xfs_super.c:1234 generic_shutdown_super+0x12c/0x2b8 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1710 xfs_kill_sb+0x20/0x58 fs/xfs/xfs_super.c:2220 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+0xb0/0x150 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762 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/u8:1/13: 1 lock held by khungtaskd/32: #0: ffff80008f4e7d20 (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: 2 locks held by pr/ttyAMA0/46: 2 locks held by kworker/1:1H/83: #0: ffff0000c20b6548 ((wq_completion)kblockd){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff800097f87bc0 ((work_completion)(&q->timeout_work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 3 locks held by kworker/u8:4/255: 3 locks held by kworker/u8:5/516: 3 locks held by kworker/u8:6/557: 3 locks held by kworker/u8:7/677: 3 locks held by kworker/u8:8/741: 3 locks held by kworker/u8:9/762: 3 locks held by kworker/u8:10/801: 2 locks held by kworker/R-bat_e/4223: 2 locks held by syslogd/6091: 2 locks held by udevd/6106: 3 locks held by dhcpcd/6160: 2 locks held by getty/6244: #0: ffff0000d7a500a0 (&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/6478: 1 lock held by syz-executor/6490: 2 locks held by syz-executor/6495: 1 lock held by syz-executor/6498: #0: ffff0000d20ce308 (&xt[i].mutex){+.+.}-{4:4}, at: xt_find_table_lock+0x64/0x3c8 net/netfilter/x_tables.c:1243 3 locks held by syz-executor/7246: 4 locks held by udevd/7482: 1 lock held by syz-executor/8404: #0: ffff0000d5f0e0e0 (&type->s_umount_key#50){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff0000d5f0e0e0 (&type->s_umount_key#50){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff0000d5f0e0e0 (&type->s_umount_key#50){++++}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 1 lock held by syz-executor/9902: #0: ffff0000d80de0e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff0000d80de0e0 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff0000d80de0e0 (&type->s_umount_key#69){++++}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 2 locks held by kworker/0:6/9995: 3 locks held by kworker/u8:11/10302: 2 locks held by kworker/u8:12/10303: 2 locks held by kworker/1:2H/10305: #0: ffff0000c20b6548 ((wq_completion)kblockd){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff80009c1d7bc0 ((work_completion)(&q->timeout_work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 =============================================