INFO: task syz-executor.4:27768 blocked for more than 143 seconds. Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack: 0 pid:27768 ppid: 3172 flags:0x00000009 Call trace: __switch_to+0x180/0x298 arch/arm64/kernel/process.c:557 context_switch kernel/sched/core.c:5182 [inline] __schedule+0x414/0x5a0 kernel/sched/core.c:6494 schedule+0x64/0xa4 kernel/sched/core.c:6570 schedule_timeout+0x64/0x1b4 kernel/time/timer.c:1911 do_wait_for_common+0xf4/0x184 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+0x48/0x60 kernel/sched/completion.c:138 f2fs_issue_checkpoint+0x158/0x244 f2fs_sync_fs+0x8c/0xc8 fs/f2fs/super.c:1651 sync_fs_one_sb+0x64/0x90 fs/sync.c:84 iterate_supers+0xc0/0x150 fs/super.c:723 ksys_sync+0x64/0xc8 fs/sync.c:104 __arm64_sys_sync+0x14/0x24 fs/sync.c:113 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 INFO: task syz-executor.3:27771 blocked for more than 143 seconds. Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack: 0 pid:27771 ppid: 3176 flags:0x00000009 Call trace: __switch_to+0x180/0x298 arch/arm64/kernel/process.c:557 context_switch kernel/sched/core.c:5182 [inline] __schedule+0x414/0x5a0 kernel/sched/core.c:6494 schedule+0x64/0xa4 kernel/sched/core.c:6570 schedule_timeout+0x64/0x1b4 kernel/time/timer.c:1911 do_wait_for_common+0xf4/0x184 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+0x48/0x60 kernel/sched/completion.c:138 f2fs_issue_checkpoint+0x158/0x244 f2fs_sync_fs+0x8c/0xc8 fs/f2fs/super.c:1651 sync_fs_one_sb+0x64/0x90 fs/sync.c:84 iterate_supers+0xc0/0x150 fs/super.c:723 ksys_sync+0x64/0xc8 fs/sync.c:104 __arm64_sys_sync+0x14/0x24 fs/sync.c:113 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/11: #0: ffff80000d433568 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/12: #0: ffff80000d433bb8 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/27: #0: ffff80000d433440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:279 2 locks held by getty/2710: #0: ffff0000c7ceb898 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 drivers/tty/tty_ldisc.c:244 #1: ffff80000f6162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x89c drivers/tty/n_tty.c:2177 3 locks held by kworker/1:19/4894: #0: ffff0000c0010738 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262 #1: ffff8000139b3d80 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264 #2: ffff000120f9e240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x98/0x164 drivers/net/netdevsim/fib.c:1489 2 locks held by kworker/u4:34/8192: 1 lock held by syz-executor.4/27768: #0: ffff000100ac80e0 (&type->s_umount_key#74){++++}-{3:3}, at: iterate_supers+0x7c/0x150 fs/super.c:721 1 lock held by syz-executor.3/27771: #0: ffff000100ac80e0 (&type->s_umount_key#74){++++}-{3:3}, at: iterate_supers+0x7c/0x150 fs/super.c:721 2 locks held by f2fs_ckpt-7:4/27759: 1 lock held by syz-executor.4/27880: #0: ffff000100ac80e0 (&type->s_umount_key#74){++++}-{3:3}, at: iterate_supers+0x7c/0x150 fs/super.c:721 1 lock held by syz-executor.3/27888: #0: ffff000100ac80e0 (&type->s_umount_key#74){++++}-{3:3}, at: iterate_supers+0x7c/0x150 fs/super.c:721 1 lock held by syz-executor.2/27910: #0: ffff000100ac80e0 (&type->s_umount_key#74){++++}-{3:3}, at: iterate_supers+0x7c/0x150 fs/super.c:721 1 lock held by syz-executor.2/27912: #0: ffff000100ac80e0 (&type->s_umount_key#74){++++}-{3:3}, at: iterate_supers+0x7c/0x150 fs/super.c:721 1 lock held by syz-executor.2/27915: #0: ffff000100ac80e0 (&type->s_umount_key#74){++++}-{3:3}, at: iterate_supers+0x7c/0x150 fs/super.c:721 1 lock held by syz-executor.2/27919: #0: ffff000100ac80e0 (&type->s_umount_key#74){++++}-{3:3}, at: iterate_supers+0x7c/0x150 fs/super.c:721 1 lock held by syz-executor.2/27921: #0: ffff000100ac80e0 (&type->s_umount_key#74){++++}-{3:3}, at: iterate_supers+0x7c/0x150 fs/super.c:721 1 lock held by syz-executor.3/28014: #0: ffff000100ac80e0 (&type->s_umount_key#74){++++}-{3:3}, at: iterate_supers+0x7c/0x150 fs/super.c:721 =============================================