INFO: task syz-executor:4320 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:4320 ppid:1 flags:0x00000009 Call trace: __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5245 [inline] __schedule+0xdd0/0x1b0c kernel/sched/core.c:6562 schedule+0xc4/0x170 kernel/sched/core.c:6638 wb_wait_for_completion+0x150/0x29c fs/fs-writeback.c:191 sync_inodes_sb+0x190/0x844 fs/fs-writeback.c:2750 sync_filesystem+0x160/0x218 fs/sync.c:64 generic_shutdown_super+0x70/0x324 fs/super.c:474 kill_block_super+0x70/0xdc fs/super.c:1470 deactivate_locked_super+0xac/0x120 fs/super.c:332 deactivate_super+0xe4/0x104 fs/super.c:363 cleanup_mnt+0x390/0x418 fs/namespace.c:1191 __cleanup_mnt+0x20/0x30 fs/namespace.c:1198 task_work_run+0x1ec/0x278 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x1fa0/0x2aa4 arch/arm64/kernel/signal.c:1137 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+0x98/0x128 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: 1 lock held by rcu_tasks_kthre/12: #0: ffff8000153d7c30 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517 1 lock held by rcu_tasks_trace/13: #0: ffff8000153d8450 ( rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517 1 lock held by khungtaskd/28: #0: ffff8000153d72c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 4 locks held by kworker/u4:3/260: #0: ffff0000c2c2c138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff800020ea7c20 ( (work_completion)(&(&wb->dwork)->work) ){+.+.}-{0:0} , at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff0000fd80c650 ( sb_internal#4){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] sb_internal#4){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x27c/0x12c0 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000e30e3f18 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff0000e30e3f18 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x480 fs/xfs/xfs_inode.c:211 3 locks held by kworker/0:2/1513: #0: ffff0000d646c538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff800025467c20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff80001786e888 ( rtnl_mutex ){+.+.}-{3:3} , at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 4 locks held by kworker/u4:4/1620: #0: ffff0000c2c2c138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff800025627c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff0000d1ab2650 (sb_internal#4){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000d1ab2650 (sb_internal#4){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x27c/0x12c0 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000f6541098 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff0000f6541098 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x480 fs/xfs/xfs_inode.c:211 2 locks held by getty/4078: #0: ffff0000d67ae098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000207bb2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xfa0 drivers/tty/n_tty.c:2198 1 lock held by udevd/4314: 1 lock held by syz-executor/4321: #0: ffff8000153dcf78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline] #0: ffff8000153dcf78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2b8/0x77c kernel/rcu/tree_exp.h:962 2 locks held by syz-executor/4320: #0: ffff0000d1ab20e0 (&type->s_umount_key#56){++++}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff0000cedb47d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cedb47d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x178/0x844 fs/fs-writeback.c:2748 2 locks held by syz-executor/4323: #0: ffff0000f81ce0e0 (&type->s_umount_key#56){++++}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff0000ced3e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000ced3e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x178/0x844 fs/fs-writeback.c:2748 2 locks held by syz-executor/4324: #0: ffff0000fd80c0e0 (&type->s_umount_key#56){++++}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff0000cedca7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cedca7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x178/0x844 fs/fs-writeback.c:2748 2 locks held by kworker/u4:7/4446: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff8000216f7c20 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 4 locks held by kworker/u4:10/4449: #0: ffff0000c2c2c138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff800021707c20 ( (work_completion)(&(&wb->dwork)->work) ){+.+.}-{0:0} , at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff000105e32650 (sb_internal#4){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] (sb_internal#4){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x27c/0x12c0 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff000104455e18 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff000104455e18 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x480 fs/xfs/xfs_inode.c:211 4 locks held by kworker/u4:14/4571: #0: ffff0000c2c2c138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff8000216d7c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff0000f81ce650 (sb_internal#4){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000f81ce650 (sb_internal#4){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x27c/0x12c0 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000f6717558 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] ffff0000f6717558 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x480 fs/xfs/xfs_inode.c:211 1 lock held by udevd/4612: 5 locks held by kworker/1:14/4616: 2 locks held by kworker/0:14/4649: #0: ffff0000c0021938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff800021b37c20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 2 locks held by kworker/0:15/4655: 3 locks held by kworker/u4:15/5171: #0: ffff0000c63f1938 ((wq_completion)cfg80211){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff8000220b7c20 ((work_completion)(&(&rdev->dfs_update_channels_wk)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff80001786e888 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 2 locks held by syz-executor/5404: #0: ffff000105e320e0 (&type->s_umount_key#56){++++}-{3:3} , at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff0000cedd87d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cedd87d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x178/0x844 fs/fs-writeback.c:2748 2 locks held by kworker/u4:21/5967: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff800021a27c20 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 3 locks held by kworker/u4:22/7208: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff8000218e7c20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff80001786e888 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 1 lock held by syz-executor/7867: #0: ffff8000153dcf78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline] #0: ffff8000153dcf78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2b8/0x77c kernel/rcu/tree_exp.h:962 3 locks held by syz.6.978/8220: #0: ffff8000178ca770 (cb_lock){++++}-{3:3}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:860 #1: ffff80001786e888 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 #2: ffff0000f83007c8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5693 [inline] #2: ffff0000f83007c8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: nl80211_pre_doit+0x238/0x758 net/wireless/nl80211.c:16442 2 locks held by syz.6.978/8221: #0: ffff8000178ca770 (cb_lock){++++}-{3:3}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:860 #1: ffff80001786e888 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 1 lock held by syz.1.988/8246: #0: ffff0000fe4380e0 (&type->s_umount_key#53/1){+.+.}-{3:3}, at: alloc_super+0x1a4/0x800 fs/super.c:228 =============================================