INFO: task syz.1.51:6930 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.51 state:D stack:0 pid:6930 tgid:6929 ppid:6551 task_flags:0x400140 flags:0x00000011 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5325 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7026 io_schedule+0x84/0xf0 kernel/sched/core.c:7871 folio_wait_bit_common+0x56c/0x9e0 mm/filemap.c:1330 __folio_lock+0x2c/0x3c mm/filemap.c:1706 folio_lock include/linux/pagemap.h:1141 [inline] release_metapage+0x130/0xa3c fs/jfs/jfs_metapage.c:870 discard_metapage fs/jfs/jfs_metapage.h:88 [inline] __get_metapage+0x91c/0xe8c fs/jfs/jfs_metapage.c:753 dtSplitPage+0x5c0/0x2cbc fs/jfs/jfs_dtree.c:1471 dtSplitUp fs/jfs/jfs_dtree.c:1092 [inline] dtInsert+0xccc/0x49c0 fs/jfs/jfs_dtree.c:871 jfs_mkdir+0x5a4/0x8b4 fs/jfs/namei.c:270 vfs_mkdir+0x284/0x424 fs/namei.c:4453 do_mkdirat+0x1f8/0x4c8 fs/namei.c:4486 __do_sys_mkdirat fs/namei.c:4503 [inline] __se_sys_mkdirat fs/namei.c:4501 [inline] __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:4501 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 INFO: task syz.1.51:6943 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.51 state:D stack:0 pid:6943 tgid:6929 ppid:6551 task_flags:0x400040 flags:0x00000001 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5325 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7026 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7083 rwsem_down_read_slowpath+0x578/0x86c kernel/locking/rwsem.c:1086 __down_read_common kernel/locking/rwsem.c:1261 [inline] __down_read kernel/locking/rwsem.c:1274 [inline] down_read+0x9c/0x2f8 kernel/locking/rwsem.c:1539 inode_lock_shared include/linux/fs.h:995 [inline] lookup_slow+0x4c/0x80 fs/namei.c:1832 walk_component+0x270/0x364 fs/namei.c:2151 lookup_last fs/namei.c:2652 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2676 filename_lookup+0x1ac/0x454 fs/namei.c:2705 user_path_at+0x50/0x74 fs/namei.c:3215 do_mount fs/namespace.c:4047 [inline] __do_sys_mount fs/namespace.c:4238 [inline] __se_sys_mount fs/namespace.c:4215 [inline] __arm64_sys_mount+0x3b0/0x468 fs/namespace.c:4215 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Showing all locks held in the system: 1 lock held by khungtaskd/32: #0: ffff80008f76b5a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 4 locks held by kworker/u8:2/41: #0: ffff0000c1f7b148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237 #1: ffff8000990b7be0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3237 #2: ffff0000dda200e0 (&type->s_umount_key#89){.+.+}-{4:4}, at: super_trylock_shared+0x24/0xdc fs/super.c:562 #3: ffff0000f4e02f90 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x19c/0x498 fs/jfs/inode.c:108 2 locks held by kworker/u8:5/737: 2 locks held by getty/6334: #0: ffff0000d315c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009bb2b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 4 locks held by syz.1.51/6930: #0: ffff0000dda20420 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:508 #1: ffff0000f4e03340 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1025 [inline] #1: ffff0000f4e03340 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: filename_create+0x1ac/0x32c fs/namei.c:4226 #2: ffff0000f4e02f90 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_mkdir+0x1bc/0x8b4 fs/jfs/namei.c:233 #3: ffff0000f4e04b08 (&jfs_ip->commit_mutex/1){+.+.}-{4:4}, at: jfs_mkdir+0x1cc/0x8b4 fs/jfs/namei.c:234 1 lock held by syz.1.51/6943: #0: ffff0000f4e03340 (&type->i_mutex_dir_key#13){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:995 [inline] #0: ffff0000f4e03340 (&type->i_mutex_dir_key#13){++++}-{4:4}, at: lookup_slow+0x4c/0x80 fs/namei.c:1832 =============================================