INFO: task syz-executor:4564 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:4564 ppid:1 flags:0x00000009 Call trace: __switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xddc/0x1b18 kernel/sched/core.c:6561 schedule+0xc4/0x170 kernel/sched/core.c:6637 wb_wait_for_completion+0x150/0x298 fs/fs-writeback.c:191 sync_inodes_sb+0x188/0x824 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/0x124 fs/super.c:332 deactivate_super+0xe8/0x108 fs/super.c:363 cleanup_mnt+0x37c/0x404 fs/namespace.c:1191 __cleanup_mnt+0x20/0x30 fs/namespace.c:1198 task_work_run+0x1ec/0x270 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2038/0x2b28 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+0x98/0x138 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: ffff0000c0c48938 ( (wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff80001c887c20 ( (work_completion)(&(&wb->dwork)->work) ){+.+.}-{0:0} , at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff0000ea528650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000ea528650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x26c/0x1234 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000e03a46d8 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff0000e03a46d8 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x484 fs/xfs/xfs_inode.c:211 1 lock held by rcu_tasks_kthre/12: #0: ffff800015297870 (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: ffff800015298090 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517 3 locks held by kworker/1:0/22: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff80001c947c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff0000d9e49240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1c8/0x263c drivers/net/netdevsim/fib.c:1491 1 lock held by khungtaskd/28: #0: ffff800015296f00 (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: ffff0000c0c48938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff80001cd87c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff0000f9fe4650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000f9fe4650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x26c/0x1234 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000e52fa7d8 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff0000e52fa7d8 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x484 fs/xfs/xfs_inode.c:211 4 locks held by kworker/u4:3/226: #0: ffff0000c0c48938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff80001ce97c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff0000ef468650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] ffff0000ef468650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x26c/0x1234 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000e532d658 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff0000e532d658 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x484 fs/xfs/xfs_inode.c:211 4 locks held by kworker/u4:4/488: #0: ffff0000c0c48938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff800020b27c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff0000ceb00650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000ceb00650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x26c/0x1234 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000e52ced98 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff0000e52ced98 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x484 fs/xfs/xfs_inode.c:211 2 locks held by getty/4078: #0: ffff0000d63b3098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000207eb2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xf9c drivers/tty/n_tty.c:2198 2 locks held by kworker/0:18/4436: 4 locks held by kworker/u4:6/4474: #0: ffff0000c0c48938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff8000212c7c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff0000ca840650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000ca840650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x26c/0x1234 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000e52fe5d8 ( &xfs_nondir_ilock_class ){++++}-{3:3} , at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] , at: xfs_ilock+0x210/0x484 fs/xfs/xfs_inode.c:211 2 locks held by kworker/1:5/4475: 4 locks held by kworker/u4:7/4556: #0: ffff0000c0c48938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff800021727c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff0000eab6c650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000eab6c650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x26c/0x1234 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000e52faf98 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff0000e52faf98 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x484 fs/xfs/xfs_inode.c:211 2 locks held by syz-executor/4564: #0: ffff0000dd10a0e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0xe0/0x108 fs/super.c:362 #1: ffff0000cefc47d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cefc47d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x170/0x824 fs/fs-writeback.c:2748 4 locks held by kworker/u4:8/4591: #0: ffff0000c0c48938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff800021c07c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff0000dd10a650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000dd10a650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x26c/0x1234 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000e52cb758 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff0000e52cb758 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x484 fs/xfs/xfs_inode.c:211 2 locks held by syz-executor/4696: #0: ffff0000ceb000e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0xe0/0x108 fs/super.c:362 #1: ffff0000cefda7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cefda7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x170/0x824 fs/fs-writeback.c:2748 2 locks held by syz-executor/4890: #0: ffff0000eab6c0e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0xe0/0x108 fs/super.c:362 #1: ffff0000cf0487d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cf0487d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x170/0x824 fs/fs-writeback.c:2748 2 locks held by syz-executor/4932: #0: ffff0000ca8400e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0xe0/0x108 fs/super.c:362 #1: ffff0000cf04e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cf04e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x170/0x824 fs/fs-writeback.c:2748 4 locks held by kworker/u4:10/4964: #0: ffff0000c0c48938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff8000228b7c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff0000c63ae650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4571 [inline] #2: ffff0000c63ae650 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x26c/0x1234 fs/xfs/libxfs/xfs_bmap.c:4698 #3: ffff0000e03a1098 (&xfs_nondir_ilock_class){++++}-{3:3}, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline] #3: ffff0000e03a1098 (&xfs_nondir_ilock_class){++++}-{3:3}, at: xfs_ilock+0x210/0x484 fs/xfs/xfs_inode.c:211 2 locks held by syz-executor/4981: #0: ffff0000ef4680e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0xe0/0x108 fs/super.c:362 #1: ffff0000cf0647d0 ( &bdi->wb_switch_rwsem ){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] ){+.+.}-{3:3}, at: sync_inodes_sb+0x170/0x824 fs/fs-writeback.c:2748 2 locks held by syz-executor/5283: #0: ffff0000c63ae0e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0xe0/0x108 fs/super.c:362 #1: ffff0000cf0827d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cf0827d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x170/0x824 fs/fs-writeback.c:2748 2 locks held by syz-executor/5329: #0: ffff0000f9fe40e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0xe0/0x108 fs/super.c:362 #1: ffff0000cf1107d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cf1107d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x170/0x824 fs/fs-writeback.c:2748 2 locks held by syz-executor/5529: #0: ffff0000ea5280e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0xe0/0x108 fs/super.c:362 #1: ffff0000cef527d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cef527d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x170/0x824 fs/fs-writeback.c:2748 2 locks held by sed/5795: =============================================