INFO: task syz.1.16:4935 blocked for more than 143 seconds. Not tainted 5.15.173-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.16 state:D stack: 0 pid: 4935 ppid: 4601 flags:0x00000009 Call trace: __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5027 [inline] __schedule+0xf10/0x1e48 kernel/sched/core.c:6373 schedule+0x11c/0x1c8 kernel/sched/core.c:6456 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6515 __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 exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 sync_fs_one_sb+0xd8/0x120 fs/sync.c:84 iterate_supers+0x124/0x1dc fs/super.c:718 ksys_sync+0xd4/0x1cc fs/sync.c:104 __arm64_sys_sync+0x14/0x24 fs/sync.c:113 __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:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 INFO: task syz.3.18:4937 blocked for more than 143 seconds. Not tainted 5.15.173-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.18 state:D stack: 0 pid: 4937 ppid: 4617 flags:0x00000009 Call trace: __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5027 [inline] __schedule+0xf10/0x1e48 kernel/sched/core.c:6373 schedule+0x11c/0x1c8 kernel/sched/core.c:6456 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6515 __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 exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 sync_fs_one_sb+0xd8/0x120 fs/sync.c:84 iterate_supers+0x124/0x1dc fs/super.c:718 ksys_sync+0xd4/0x1cc fs/sync.c:104 __arm64_sys_sync+0x14/0x24 fs/sync.c:113 __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:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 INFO: task syz.0.15:4939 blocked for more than 143 seconds. Not tainted 5.15.173-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.15 state:D stack: 0 pid: 4939 ppid: 4595 flags:0x00000009 Call trace: __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5027 [inline] __schedule+0xf10/0x1e48 kernel/sched/core.c:6373 schedule+0x11c/0x1c8 kernel/sched/core.c:6456 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6515 __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 exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 sync_fs_one_sb+0xd8/0x120 fs/sync.c:84 iterate_supers+0x124/0x1dc fs/super.c:718 ksys_sync+0xd4/0x1cc fs/sync.c:104 __arm64_sys_sync+0x14/0x24 fs/sync.c:113 __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:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 INFO: task syz.4.19:4941 blocked for more than 143 seconds. Not tainted 5.15.173-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.19 state:D stack: 0 pid: 4941 ppid: 4619 flags:0x00000009 Call trace: __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5027 [inline] __schedule+0xf10/0x1e48 kernel/sched/core.c:6373 schedule+0x11c/0x1c8 kernel/sched/core.c:6456 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6515 __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 exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 sync_fs_one_sb+0xd8/0x120 fs/sync.c:84 iterate_supers+0x124/0x1dc fs/super.c:718 ksys_sync+0xd4/0x1cc fs/sync.c:104 __arm64_sys_sync+0x14/0x24 fs/sync.c:113 __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:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 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: ffff800014c922e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311 2 locks held by kworker/u4:4/341: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283 #1: ffff80001fea7c00 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285 3 locks held by kworker/0:2/3603: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283 #1: ffff800022ba7c00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285 #2: ffff0000f7ca9240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x274/0x33c4 drivers/net/netdevsim/fib.c:1480 2 locks held by getty/3782: #0: ffff0000d3a97098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001d5fe2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1204 drivers/tty/n_tty.c:2158 3 locks held by syz-executor/4605: 3 locks held by kworker/1:11/4910: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283 #1: ffff80001fd47c00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285 #2: ffff0000f1d99240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x274/0x33c4 drivers/net/netdevsim/fib.c:1480 2 locks held by kworker/u4:7/4920: 2 locks held by syz.1.16/4935: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.3.18/4937: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.0.15/4939: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.4.19/4941: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.5.21/4967: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.8.24/5062: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.6.22/5064: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.7.23/5066: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.9.25/5068: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.2.26/5082: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.0.27/5127: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.1.28/5162: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.3.29/5164: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.4.30/5166: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.5.31/5178: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.8.32/5204: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.6.33/5283: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.7.34/5286: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.2.36/5288: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.9.35/5290: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.0.37/5307: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.1.38/5351: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.3.39/5383: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.4.40/5395: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.5.41/5397: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.8.42/5409: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.6.43/5435: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.7.44/5486: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.2.45/5509: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.9.46/5515: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.0.47/5517: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.1.48/5531: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.3.49/5546: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.4.50/5595: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 4 locks held by syz-executor/5607: 2 locks held by syz.5.51/5627: #0: ffff0000cb13e0e0 (&type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 2 locks held by syz.8.52/5631: #0: ffff0000cb13e0e0 ( &type->s_umount_key#68){.+.+}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716 #1: ffff0000dd4ce0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64 =============================================