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:2756 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:1151 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 INFO: task syz-executor:4325 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:4325 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:2756 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:1151 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 INFO: task syz-executor:4332 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:4332 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:2756 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:1151 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: 4 locks held by kworker/u4:0/9: #0: ffff0000c2c10938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff80001c9b7c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff0000f72e4650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000f72e4650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x27c/0x12c0 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000e00bd658 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff0000e00bd658 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x480 fs/xfs/xfs_inode.c:211 4 locks held by kworker/u4:1/11: #0: ffff0000c2c10938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff80001c9d7c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff0000f3d8a650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000f3d8a650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x27c/0x12c0 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000e00bb758 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff0000e00bb758 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x480 fs/xfs/xfs_inode.c:211 1 lock held by rcu_tasks_kthre/12: #0: ffff8000153e7c30 (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: ffff8000153e8450 (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: ffff8000153e72c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 4 locks held by kworker/u4:2/39: #0: ffff0000c2c10938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff80001ced7c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff0000ddcc2650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000ddcc2650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x27c/0x12c0 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000f5ffaf98 ( &xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] &xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x480 fs/xfs/xfs_inode.c:211 4 locks held by kworker/u4:4/1574: #0: ffff0000c2c10938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff8000251e7c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff0000cebec650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000cebec650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x27c/0x12c0 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000e03bde18 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff0000e03bde18 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x480 fs/xfs/xfs_inode.c:211 2 locks held by getty/4078: #0: ffff0000d6f11098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001cfd62f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xfa0 drivers/tty/n_tty.c:2198 2 locks held by syz-executor/4320: #0: ffff0000f3d8a0e0 ( &type->s_umount_key #52){++++}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff0000cec0a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cec0a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x178/0x844 fs/fs-writeback.c:2754 2 locks held by syz-executor/4321: #0: ffff0000f72e40e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff0000cebe87d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cebe87d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x178/0x844 fs/fs-writeback.c:2754 2 locks held by syz-executor/4325: #0: ffff0000cea120e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff0000ceb4a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000ceb4a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x178/0x844 fs/fs-writeback.c:2754 2 locks held by syz-executor/4331: #0: ffff0000cc5040e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff0000cec047d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cec047d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x178/0x844 fs/fs-writeback.c:2754 2 locks held by syz-executor/4332: #0: ffff0000ddcc20e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff0000cebee7d0 ( &bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] &bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x178/0x844 fs/fs-writeback.c:2754 2 locks held by kworker/1:6/4368: 3 locks held by kworker/0:6/4370: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff800020c77c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff0000dec19240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1d0/0x27cc drivers/net/netdevsim/fib.c:1491 3 locks held by kworker/0:7/4403: #0: ffff0000d62e7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff800021247c20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff80001787f188 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 4 locks held by kworker/u4:7/4414: #0: ffff0000c2c10938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff800021347c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff0000cea12650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000cea12650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x27c/0x12c0 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000e00b9858 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff0000e00b9858 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x480 fs/xfs/xfs_inode.c:211 4 locks held by kworker/u4:8/4473: #0: ffff0000c2c10938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff800020d37c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff0000f4c46650 ( sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x27c/0x12c0 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000f5ffed98 ( &xfs_nondir_ilock_class ){++++}-{3:3} , at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] , at: xfs_ilock+0x210/0x480 fs/xfs/xfs_inode.c:211 4 locks held by kworker/u4:11/4536: #0: ffff0000c2c10938 ( (wq_completion)writeback ){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff800020d87c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff0000d00d6650 (sb_internal#2){.+.+}-{0:0} , at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] , at: xfs_bmapi_convert_delalloc+0x27c/0x12c0 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000f5ff88d8 (&xfs_nondir_ilock_class ){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] ){++++}-{3:3}, at: xfs_ilock+0x210/0x480 fs/xfs/xfs_inode.c:211 4 locks held by kworker/u4:12/4600: #0: ffff0000c2c10938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff800021097c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff0000ccdf4650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000ccdf4650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x27c/0x12c0 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000e03be5d8 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff0000e03be5d8 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x480 fs/xfs/xfs_inode.c:211 4 locks held by kworker/u4:15/4603: #0: ffff0000c2c10938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff8000210c7c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff0000cc504650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000cc504650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x27c/0x12c0 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000f5ffd658 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff0000f5ffd658 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x480 fs/xfs/xfs_inode.c:211 2 locks held by syz-executor/4616: #0: ffff0000f4c460e0 ( &type->s_umount_key #52){++++}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff0000ceca87d0 ( &bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] &bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x178/0x844 fs/fs-writeback.c:2754 2 locks held by syz-executor/4776: #0: ffff0000d00d60e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff0000cecc47d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cecc47d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x178/0x844 fs/fs-writeback.c:2754 2 locks held by syz-executor/4998: #0: ffff0000cebec0e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff0000ced027d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000ced027d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x178/0x844 fs/fs-writeback.c:2754 2 locks held by syz-executor/5195: #0: ffff0000ccdf40e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff0000ced287d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000ced287d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x178/0x844 fs/fs-writeback.c:2754 2 locks held by kworker/u4:18/5494: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff8000239f7c20 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 1 lock held by syz.0.277/5742: #0: ffff0000cea120e0 (&type->s_umount_key#52){++++}-{3:3}, at: user_get_super+0x118/0x234 fs/super.c:889 2 locks held by dhcpcd/5790: #0: ffff0000e03ed610 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: __sock_release net/socket.c:653 [inline] (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: sock_close+0x7c/0x1f8 net/socket.c:1399 #1: ffff8000153ecf78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline] #1: ffff8000153ecf78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3fc/0x77c kernel/rcu/tree_exp.h:962 1 lock held by syz.1.336/6090: #0: ffff0000f72e40e0 (&type->s_umount_key#52){++++}-{3:3}, at: user_get_super+0xd4/0x234 fs/super.c:887 1 lock held by syz.4.348/6129: #0: ffff0000f3d8a0e0 (&type->s_umount_key#52){++++}-{3:3}, at: user_get_super+0xd4/0x234 fs/super.c:887 2 locks held by kworker/u4:23/6147: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff800023ac7c20 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 1 lock held by syz.3.354/6159: #0: ffff0000cc5040e0 (&type->s_umount_key#52){++++}-{3:3}, at: user_get_super+0xd4/0x234 fs/super.c:887 3 locks held by syz-executor/6348: 3 locks held by kworker/u4:29/6557: 5 locks held by syz.5.434/6707: 1 lock held by syz.7.435/6727: 1 lock held by rm/6757: =============================================