INFO: task syz-executor.0:32315 blocked for more than 143 seconds. Not tainted 5.15.148-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:24992 pid:32315 ppid: 3536 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5030 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376 schedule+0x11b/0x1f0 kernel/sched/core.c:6459 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6518 rwsem_down_read_slowpath+0x605/0xb40 kernel/locking/rwsem.c:1047 __down_read_common kernel/locking/rwsem.c:1231 [inline] __down_read kernel/locking/rwsem.c:1244 [inline] down_read+0x9a/0x2e0 kernel/locking/rwsem.c:1490 iterate_supers+0xac/0x1e0 fs/super.c:703 quota_sync_all fs/quota/quota.c:68 [inline] __do_sys_quotactl fs/quota/quota.c:936 [inline] __se_sys_quotactl+0x347/0x770 fs/quota/quota.c:915 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f8de8db0da9 RSP: 002b:00007f8de73310c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3 RAX: ffffffffffffffda RBX: 00007f8de8edef80 RCX: 00007f8de8db0da9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102 RBP: 00007f8de8dfd47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f8de8edef80 R15: 00007fff5d2b83d8 INFO: task syz-executor.0:32355 blocked for more than 144 seconds. Not tainted 5.15.148-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28736 pid:32355 ppid: 3536 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5030 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376 schedule+0x11b/0x1f0 kernel/sched/core.c:6459 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6518 rwsem_down_read_slowpath+0x605/0xb40 kernel/locking/rwsem.c:1047 __down_read_common kernel/locking/rwsem.c:1231 [inline] __down_read kernel/locking/rwsem.c:1244 [inline] down_read+0x9a/0x2e0 kernel/locking/rwsem.c:1490 iterate_supers+0xac/0x1e0 fs/super.c:703 ksys_sync+0xb9/0x1c0 fs/sync.c:102 __do_sys_sync+0xa/0x10 fs/sync.c:113 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f8de8db0da9 RSP: 002b:00007f8de73100c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f8de8edf050 RCX: 00007f8de8db0da9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f8de8dfd47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f8de8edf050 R15: 00007fff5d2b83d8 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8c91f220 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by getty/3258: #0: ffff888024a9b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc90002bab2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158 1 lock held by syz-executor.4/3534: 1 lock held by syz-executor.2/3546: 1 lock held by syz-executor.3/13549: 3 locks held by kworker/u4:9/855: 1 lock held by syz-executor.0/32315: #0: ffff88803f1340e0 (&type->s_umount_key#93){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:703 1 lock held by syz-executor.0/32355: #0: ffff88803f1340e0 (&type->s_umount_key#93){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:703 1 lock held by syz-executor.0/6043: #0: ffff88803f1340e0 (&type->s_umount_key#93){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:703 1 lock held by syz-executor.0/6063: #0: ffff88803f1340e0 (&type->s_umount_key#93){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:703 1 lock held by syz-executor.0/13019: #0: ffff88803f1340e0 (&type->s_umount_key#93){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:703 1 lock held by syz-executor.0/13029: #0: ffff88803f1340e0 (&type->s_umount_key#93){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:703 1 lock held by syz-executor.4/24612: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.148-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xe72/0xeb0 kernel/hung_task.c:295 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4785 Comm: syz-fuzzer Not tainted 5.15.148-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0033:0x72d5d2 Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 4c 8d a4 24 00 ff ff ff 4d 3b 66 10 0f 86 e4 06 00 00 <55> 48 89 e5 48 81 ec 78 01 00 00 48 89 84 24 88 01 00 00 48 89 9c RSP: 002b:000000c02fc510e8 EFLAGS: 00000206 RAX: 0000000000dba2f8 RBX: 000000c0332a7120 RCX: 000000c03764f380 RDX: 000000c037869260 RSI: 0000000000dba2f8 RDI: 000000c02fc51188 RBP: 000000c02fc51138 R08: 0000000000000003 R09: 0000000000000000 R10: 000000000001b279 R11: ffffffffffffffff R12: 000000c02fc50fe8 R13: 1300131313131313 R14: 000000c0003edba0 R15: 000000000000004e FS: 000000c02d58f890 GS: 0000000000000000