INFO: task syz-executor.1:13989 blocked for more than 143 seconds. Not tainted 6.1.72-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:0 pid:13989 ppid:4258 flags:0x0000000c Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5245 [inline] __schedule+0xee4/0x1c98 kernel/sched/core.c:6558 schedule+0xc4/0x170 kernel/sched/core.c:6634 wb_wait_for_completion+0x154/0x29c fs/fs-writeback.c:191 sync_inodes_sb+0x220/0x944 fs/fs-writeback.c:2739 sync_filesystem+0x160/0x218 fs/sync.c:64 generic_shutdown_super+0x70/0x328 fs/super.c:474 kill_block_super+0x70/0xdc fs/super.c:1459 deactivate_locked_super+0xac/0x124 fs/super.c:332 deactivate_super+0xf0/0x110 fs/super.c:363 cleanup_mnt+0x394/0x41c fs/namespace.c:1186 __cleanup_mnt+0x20/0x30 fs/namespace.c:1193 task_work_run+0x240/0x2f0 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x554/0x1a88 kernel/exit.c:869 do_group_exit+0x194/0x22c kernel/exit.c:1019 get_signal+0x14a0/0x158c kernel/signal.c:2862 do_signal arch/arm64/kernel/signal.c:1076 [inline] do_notify_resume+0x3ac/0x3474 arch/arm64/kernel/signal.c:1129 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Showing all locks held in the system: 4 locks held by kworker/u4:1/11: #0: ffff0000c2e45938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff800019e27c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 #2: ffff000125b50650 (sb_internal#4){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x21c/0x10b0 fs/xfs/libxfs/xfs_bmap.c:4521 #3: ffff00013991a018 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff00013991a018 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x218/0x4e4 fs/xfs/xfs_inode.c:211 1 lock held by rcu_tasks_kthre/12: #0: ffff800015a04eb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516 1 lock held by rcu_tasks_trace/13: #0: ffff800015a056b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3} , at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516 1 lock held by khungtaskd/28: #0: ffff800015a04ce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:305 2 locks held by getty/3985: #0: ffff0000d6376098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001bca02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2188 4 locks held by kworker/1:4/4326: 2 locks held by syz-executor.1/13989: #0: ffff000125b500e0 (&type->s_umount_key#101){++++}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:362 #1: ffff0000ce3e67d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000ce3e67d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2737 3 locks held by syz-executor.5/23217: #0: ffff0000e267fa10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #0: ffff0000e267fa10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release net/socket.c:653 [inline] #0: ffff0000e267fa10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: sock_close+0x80/0x1fc net/socket.c:1400 #1: ffff800017e64650 ((netlink_chain).rwsem){++++}-{3:3}, at: blocking_notifier_call_chain+0x60/0x198 kernel/notifier.c:381 #2: ffff0000c3d49cb8 (&nft_net->commit_mutex){+.+.}-{3:3}, at: nft_rcv_nl_event+0x108/0x570 net/netfilter/nf_tables_api.c:10777 1 lock held by syz-executor.5/23220: #0: ffff0000c3d49cb8 (&nft_net->commit_mutex){+.+.}-{3:3}, at: nf_tables_valid_genid+0x3c/0xd4 net/netfilter/nf_tables_api.c:10058 =============================================