INFO: task syz-executor.1:4092 blocked for more than 143 seconds. Not tainted 5.15.106-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack: 0 pid: 4092 ppid: 1 flags:0x00000009 Call trace: __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5026 [inline] __schedule+0xf10/0x1e38 kernel/sched/core.c:6372 schedule+0x11c/0x1c8 kernel/sched/core.c:6455 rwsem_down_write_slowpath+0xca8/0x1340 kernel/locking/rwsem.c:1157 __down_write_common kernel/locking/rwsem.c:1284 [inline] __down_write kernel/locking/rwsem.c:1293 [inline] down_write+0x25c/0x260 kernel/locking/rwsem.c:1542 unregister_shrinker+0x78/0x2e4 mm/vmscan.c:678 deactivate_locked_super+0x98/0x13c fs/super.c:334 deactivate_super+0x108/0x128 fs/super.c:366 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150 task_work_run+0x130/0x1e4 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:597 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 INFO: task syz-executor.5:7010 blocked for more than 143 seconds. Not tainted 5.15.106-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack: 0 pid: 7010 ppid: 4845 flags:0x00000009 Call trace: __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5026 [inline] __schedule+0xf10/0x1e38 kernel/sched/core.c:6372 schedule+0x11c/0x1c8 kernel/sched/core.c:6455 schedule_timeout+0xb8/0x344 kernel/time/timer.c:1860 do_wait_for_common+0x214/0x388 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x4c/0x64 kernel/sched/completion.c:138 xfs_buf_iowait+0x16c/0x704 fs/xfs/xfs_buf.c:1573 xfs_buf_delwri_pushbuf+0x330/0x5e4 fs/xfs/xfs_buf.c:2251 xfs_qm_flush_one+0x1fc/0x2cc fs/xfs/xfs_qm.c:1249 xfs_qm_dquot_walk+0x1f0/0x424 fs/xfs/xfs_qm.c:86 xfs_qm_quotacheck+0x288/0x56c fs/xfs/xfs_qm.c:1335 xfs_qm_mount_quotas+0x2ac/0x578 fs/xfs/xfs_qm.c:1441 xfs_mountfs+0x11e4/0x1778 fs/xfs/xfs_mount.c:904 xfs_fs_fill_super+0xd64/0xf60 fs/xfs/xfs_super.c:1658 get_tree_bdev+0x360/0x54c fs/super.c:1303 xfs_fs_get_tree+0x28/0x38 fs/xfs/xfs_super.c:1705 vfs_get_tree+0x90/0x274 fs/super.c:1508 do_new_mount+0x25c/0x8c8 fs/namespace.c:2994 path_mount+0x590/0x104c fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount fs/namespace.c:3522 [inline] __arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3522 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 INFO: task syz-executor.2:7014 blocked for more than 143 seconds. Not tainted 5.15.106-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack: 0 pid: 7014 ppid: 4094 flags:0x00000009 Call trace: __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5026 [inline] __schedule+0xf10/0x1e38 kernel/sched/core.c:6372 schedule+0x11c/0x1c8 kernel/sched/core.c:6455 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6514 __mutex_lock_common+0xba0/0x2154 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743 xfs_qm_dqfree_one+0x74/0x1b0 fs/xfs/xfs_qm.c:1607 xfs_qm_shrink_scan+0x280/0x354 fs/xfs/xfs_qm.c:523 do_shrink_slab+0x4b4/0x10b0 mm/vmscan.c:758 shrink_slab+0x1f8/0x894 mm/vmscan.c:918 drop_slab_node+0xcc/0x170 mm/vmscan.c:953 drop_slab+0x98/0x140 mm/vmscan.c:963 drop_caches_sysctl_handler+0x178/0x394 fs/drop_caches.c:66 proc_sys_call_handler+0x4cc/0x7cc fs/proc/proc_sysctl.c:587 proc_sys_write+0x2c/0x3c fs/proc/proc_sysctl.c:613 do_iter_readv_writev+0x420/0x5f8 do_iter_write+0x1b8/0x664 fs/read_write.c:855 vfs_iter_write+0x88/0xac fs/read_write.c:896 iter_file_splice_write+0x618/0xc48 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0xe4/0x1c0 fs/splice.c:936 splice_direct_to_actor+0x408/0x9a0 fs/splice.c:891 do_splice_direct+0x1f4/0x334 fs/splice.c:979 do_sendfile+0x4bc/0xc70 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1311 [inline] __se_sys_sendfile64 fs/read_write.c:1303 [inline] __arm64_sys_sendfile64+0x264/0x408 fs/read_write.c:1303 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffff800014aa1660 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:268 3 locks held by kworker/u4:1/136: 2 locks held by getty/3734: #0: ffff0000d281b098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff800018e102e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1200 drivers/tty/n_tty.c:2147 2 locks held by syz-executor.1/4092: #0: ffff0000dbbbc0e0 (&type->s_umount_key#48){+.+.}-{3:3}, at: deactivate_super+0x100/0x128 fs/super.c:365 #1: ffff800014b325f0 (shrinker_rwsem){++++}-{3:3}, at: unregister_shrinker+0x78/0x2e4 mm/vmscan.c:678 3 locks held by syz-executor.5/7010: #0: ffff0000dc66c0e0 (&type->s_umount_key#54/1){+.+.}-{3:3}, at: alloc_super+0x1b8/0x844 fs/super.c:229 #1: ffff0001368db158 (&qinf->qi_tree_lock){+.+.}-{3:3}, at: xfs_qm_dquot_walk+0x130/0x424 fs/xfs/xfs_qm.c:73 #2: ffff00011d3a95d8 (&dqp->q_qlock){+.+.}-{3:3}, at: xfs_dqlock fs/xfs/xfs_dquot.h:133 [inline] #2: ffff00011d3a95d8 (&dqp->q_qlock){+.+.}-{3:3}, at: xfs_qm_flush_one+0xc8/0x2cc fs/xfs/xfs_qm.c:1225 3 locks held by syz-executor.2/7014: #0: ffff0000d4c7c460 (sb_writers#4){.+.+}-{0:0}, at: do_sendfile+0x4a0/0xc70 fs/read_write.c:1248 #1: ffff800014b325f0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x10c/0x894 mm/vmscan.c:908 #2: ffff0001368db158 (&qinf->qi_tree_lock){+.+.}-{3:3}, at: xfs_qm_dqfree_one+0x74/0x1b0 fs/xfs/xfs_qm.c:1607 3 locks held by syz-executor.4/7070: #0: ffff0000c5078660 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: mount_bdev+0x8c/0x368 fs/super.c:1345 #1: ffff00011108a0e0 (&type->s_umount_key#26/1){+.+.}-{3:3}, at: alloc_super+0x1b8/0x844 fs/super.c:229 #2: ffff800014b325f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline] #2: ffff800014b325f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xa4/0x75c mm/vmscan.c:620 3 locks held by syz-executor.3/7071: #0: ffff0000c5077020 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: mount_bdev+0x8c/0x368 fs/super.c:1345 #1: ffff00011301c0e0 (&type->s_umount_key#50/1){+.+.}-{3:3}, at: alloc_super+0x1b8/0x844 fs/super.c:229 #2: ffff800014b325f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline] #2: ffff800014b325f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xa4/0x75c mm/vmscan.c:620 2 locks held by syz-executor.5/7087: #0: ffff000136f180e0 (&type->s_umount_key#22/1){+.+.}-{3:3}, at: alloc_super+0x1b8/0x844 fs/super.c:229 #1: ffff800014b325f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline] #1: ffff800014b325f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xa4/0x75c mm/vmscan.c:620 2 locks held by syz-executor.2/7091: #0: ffff000136b0a0e0 (&type->s_umount_key#22/1){+.+.}-{3:3}, at: alloc_super+0x1b8/0x844 fs/super.c:229 #1: ffff800014b325f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline] #1: ffff800014b325f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xa4/0x75c mm/vmscan.c:620 2 locks held by syz-executor.5/7094: #0: ffff0001211760e0 (&type->s_umount_key#22/1){+.+.}-{3:3}, at: alloc_super+0x1b8/0x844 fs/super.c:229 #1: ffff800014b325f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline] #1: ffff800014b325f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xa4/0x75c mm/vmscan.c:620 2 locks held by syz-executor.2/7099: #0: ffff0000c89c20e0 (&type->s_umount_key#22/1){+.+.}-{3:3}, at: alloc_super+0x1b8/0x844 fs/super.c:229 #1: ffff800014b325f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_memcg_shrinker mm/vmscan.c:359 [inline] #1: ffff800014b325f0 (shrinker_rwsem){++++}-{3:3}, at: prealloc_shrinker+0xa4/0x75c mm/vmscan.c:620 =============================================