INFO: task syz.2.3553:22374 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.3553      state:D stack:28744 pid:22374 tgid:22368 ppid:19481  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5257 [inline]
 __schedule+0x14bc/0x5030 kernel/sched/core.c:6864
 __schedule_loop kernel/sched/core.c:6946 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6961
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7018
 rwsem_down_read_slowpath+0x5fd/0x8f0 kernel/locking/rwsem.c:1086
 __down_read_common kernel/locking/rwsem.c:1261 [inline]
 __down_read kernel/locking/rwsem.c:1274 [inline]
 down_read+0x98/0x2e0 kernel/locking/rwsem.c:1539
 inode_lock_shared include/linux/fs.h:1042 [inline]
 lookup_slow+0x46/0x70 fs/namei.c:1871
 walk_component+0x2d2/0x400 fs/namei.c:2190
 lookup_last fs/namei.c:2691 [inline]
 path_lookupat+0x163/0x430 fs/namei.c:2715
 filename_lookup+0x212/0x570 fs/namei.c:2744
 user_path_at+0x3a/0x60 fs/namei.c:3536
 inotify_find_inode fs/notify/inotify/inotify_user.c:377 [inline]
 __do_sys_inotify_add_watch fs/notify/inotify/inotify_user.c:771 [inline]
 __se_sys_inotify_add_watch+0x182/0xf10 fs/notify/inotify/inotify_user.c:729
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc61ed8f749
RSP: 002b:00007fc61fc3e038 EFLAGS: 00000246 ORIG_RAX: 00000000000000fe
RAX: ffffffffffffffda RBX: 00007fc61efe6180 RCX: 00007fc61ed8f749
RDX: 0000000020000051 RSI: 0000200000000280 RDI: 0000000000000004
RBP: 00007fc61ee13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc61efe6218 R14: 00007fc61efe6180 R15: 00007ffebf8c5448
 </TASK>
INFO: task syz.2.3553:22375 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.3553      state:D stack:28744 pid:22375 tgid:22368 ppid:19481  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5257 [inline]
 __schedule+0x14bc/0x5030 kernel/sched/core.c:6864
 __schedule_loop kernel/sched/core.c:6946 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6961
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7018
 rwsem_down_read_slowpath+0x5fd/0x8f0 kernel/locking/rwsem.c:1086
 __down_read_common kernel/locking/rwsem.c:1261 [inline]
 __down_read kernel/locking/rwsem.c:1274 [inline]
 down_read+0x98/0x2e0 kernel/locking/rwsem.c:1539
 inode_lock_shared include/linux/fs.h:1042 [inline]
 lookup_slow+0x46/0x70 fs/namei.c:1871
 walk_component+0x2d2/0x400 fs/namei.c:2190
 lookup_last fs/namei.c:2691 [inline]
 path_lookupat+0x163/0x430 fs/namei.c:2715
 filename_lookup+0x212/0x570 fs/namei.c:2744
 user_path_at+0x3a/0x60 fs/namei.c:3536
 do_mount fs/namespace.c:4054 [inline]
 __do_sys_mount fs/namespace.c:4246 [inline]
 __se_sys_mount+0x2d4/0x410 fs/namespace.c:4223
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc61ed8f749
RSP: 002b:00007fc61fc1d038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fc61efe6270 RCX: 00007fc61ed8f749
RDX: 0000200000000000 RSI: 0000200000000080 RDI: 0000000000000000
RBP: 00007fc61ee13f91 R08: 00002000000002c0 R09: 0000000000000000
R10: 0000000000010000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc61efe6308 R14: 00007fc61efe6270 R15: 00007ffebf8c5448
 </TASK>

Showing all locks held in the system:
4 locks held by kworker/0:1/10:
 #0: ffff8880b863a918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:647
 #1: ffff8880b8624588 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880 kernel/sched/psi.c:933
 #2: ffff88801e7b88a8 (&vb->wakeup_lock){-.-.}-{3:3}, at: spin_lock_irq include/linux/spinlock.h:376 [inline]
 #2: ffff88801e7b88a8 (&vb->wakeup_lock){-.-.}-{3:3}, at: finish_wakeup_event drivers/virtio/virtio_balloon.c:168 [inline]
 #2: ffff88801e7b88a8 (&vb->wakeup_lock){-.-.}-{3:3}, at: update_balloon_stats_func+0x170/0x2e0 drivers/virtio/virtio_balloon.c:549
 #3: ffff888144ede1f8 (&dev->power.lock){-.-.}-{3:3}, at: pm_relax+0x35/0x100 drivers/base/power/wakeup.c:744
1 lock held by khungtaskd/31:
 #0: ffffffff8df3d980 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #0: ffffffff8df3d980 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
 #0: ffffffff8df3d980 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by getty/5590:
 #0: ffff88803537f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
3 locks held by syz.2.3553/22370:
1 lock held by syz.2.3553/22374:
 #0: ffff8880446fdaf8 (&type->i_mutex_dir_key#15){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1042 [inline]
 #0: ffff8880446fdaf8 (&type->i_mutex_dir_key#15){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1871
1 lock held by syz.2.3553/22375:
 #0: ffff8880446fdaf8 (&type->i_mutex_dir_key#15){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1042 [inline]
 #0: ffff8880446fdaf8 (&type->i_mutex_dir_key#15){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1871

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
 watchdog+0xfb5/0x1000 kernel/hung_task.c:515
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 70 0c 00 f3 0f 1e fa fb f4 <e9> c8 f2 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6
RAX: 9ae9df1159ec5400 RBX: ffffffff8197acb7 RCX: 9ae9df1159ec5400
RDX: 0000000000000001 RSI: ffffffff8d78f71d RDI: ffffffff8bbf81e0
RBP: ffffc90000197f10 R08: ffff8880b87336db R09: 1ffff110170e66db
R10: dffffc0000000000 R11: ffffed10170e66dc R12: ffffffff8f7deb70
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff11003a56b70
FS:  0000000000000000(0000) GS:ffff888125fba000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000031000 CR3: 0000000030b90000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:190 [inline]
 do_idle+0x1e7/0x510 kernel/sched/idle.c:330
 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x147
 </TASK>