INFO: task kworker/u4:0:9 blocked for more than 144 seconds. Not tainted 6.1.139-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:0 state:D stack:0 pid:9 ppid:2 flags:0x00000008 Workqueue: writeback wb_workfn (flush-7:2) Call trace: __switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xdd4/0x1b2c kernel/sched/core.c:6561 schedule+0xc4/0x170 kernel/sched/core.c:6637 rwsem_down_write_slowpath+0xb74/0x125c kernel/locking/rwsem.c:1189 __down_write_common kernel/locking/rwsem.c:1314 [inline] __down_write kernel/locking/rwsem.c:1323 [inline] down_write+0x84/0x88 kernel/locking/rwsem.c:1574 f2fs_down_write fs/f2fs/f2fs.h:2178 [inline] f2fs_balance_fs+0x3d0/0x5c4 fs/f2fs/segment.c:428 f2fs_write_inode+0x3f4/0x598 fs/f2fs/inode.c:737 write_inode fs/fs-writeback.c:1460 [inline] __writeback_single_inode+0x5e0/0x157c fs/fs-writeback.c:1677 writeback_sb_inodes+0x824/0x1404 fs/fs-writeback.c:1903 __writeback_inodes_wb+0x110/0x394 fs/fs-writeback.c:1974 wb_writeback+0x414/0xfb0 fs/fs-writeback.c:2079 wb_check_background_flush fs/fs-writeback.c:2145 [inline] wb_do_writeback fs/fs-writeback.c:2233 [inline] wb_workfn+0xac0/0xd98 fs/fs-writeback.c:2260 process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292 worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864 INFO: task syz.2.217:5434 blocked for more than 145 seconds. Not tainted 6.1.139-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.217 state:D stack:0 pid:5434 ppid:4302 flags:0x00000001 Call trace: __switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xdd4/0x1b2c kernel/sched/core.c:6561 schedule+0xc4/0x170 kernel/sched/core.c:6637 rwsem_down_write_slowpath+0xb74/0x125c kernel/locking/rwsem.c:1189 __down_write_common kernel/locking/rwsem.c:1314 [inline] __down_write kernel/locking/rwsem.c:1323 [inline] down_write+0x84/0x88 kernel/locking/rwsem.c:1574 f2fs_down_write fs/f2fs/f2fs.h:2178 [inline] f2fs_trim_fs+0x6ec/0xfe8 fs/f2fs/segment.c:3090 f2fs_ioc_fitrim fs/f2fs/file.c:2393 [inline] __f2fs_ioctl+0x3d80/0xaab8 fs/f2fs/file.c:4324 f2fs_ioctl+0x130/0x1a0 fs/f2fs/file.c:4403 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 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: ffff0000c2e4d938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff80001c817c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff0000daa2c0e0 (&type->s_umount_key#67){++++}-{3:3}, at: trylock_super+0x24/0xf4 fs/super.c:415 #3: ffff0000f15411e8 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2178 [inline] #3: ffff0000f15411e8 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x3d0/0x5c4 fs/f2fs/segment.c:428 1 lock held by rcu_tasks_kthre/12: #0: ffff8000152476b0 (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: ffff800015247ed0 (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: ffff800015246d40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 2 locks held by getty/4066: #0: ffff0000d6279098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001ce602f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xf9c drivers/tty/n_tty.c:2198 6 locks held by syz.2.217/5397: 2 locks held by syz.2.217/5434: #0: ffff0000daa2c460 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write_file+0x64/0x1e8 fs/namespace.c:437 #1: ffff0000f15411e8 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2178 [inline] #1: ffff0000f15411e8 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_trim_fs+0x6ec/0xfe8 fs/f2fs/segment.c:3090 2 locks held by kworker/u4:22/5537: 1 lock held by udevd/5612: 1 lock held by udevd/5879: 1 lock held by udevd/5887: 1 lock held by syz.1.580/7162: 2 locks held by syz.5.583/7200: 1 lock held by sed/7225: =============================================