INFO: task syz.2.17:5122 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.17 state:D stack:14328 pid:5122 tgid:5120 ppid:4981 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x6dd/0x1660 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0xac/0x140 kernel/sched/core.c:7026
schedule_preempt_disabled+0x32/0x60 kernel/sched/core.c:7083
rwsem_down_write_slowpath+0x2e2/0x6f0 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write_nested+0x65/0x90 kernel/locking/rwsem.c:1707
inode_lock_nested include/linux/fs.h:1108 [inline]
lock_rename fs/namei.c:3360 [inline]
do_renameat2+0x2b8/0x5e0 fs/namei.c:5311
__do_sys_rename fs/namei.c:5411 [inline]
__se_sys_rename fs/namei.c:5409 [inline]
__x64_sys_rename+0x3b/0x50 fs/namei.c:5409
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x8f/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f447658f749
RSP: 002b:00007f4477377038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f44767e6090 RCX: 00007f447658f749
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000200000000340
RBP: 00007f4476613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f44767e6128 R14: 00007f44767e6090 R15: 00007ffefa8d7d98
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff851f5f30 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff851f5f30 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff851f5f30 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x2e/0x100 kernel/locking/lockdep.c:6775
2 locks held by getty/4321:
#0: ffff88810cf890a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243
#1: ffffc9000b6c32f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x1c3/0x6e0 drivers/tty/n_tty.c:2222
3 locks held by syz.2.17/5121:
2 locks held by syz.2.17/5122:
#0: ffff888117b11420 (sb_writers#12){....}-{0:0}, at: do_renameat2+0x210/0x5e0 fs/namei.c:5306
#1: ffff888115c9e2f8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1108 [inline]
#1: ffff888115c9e2f8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: lock_rename fs/namei.c:3360 [inline]
#1: ffff888115c9e2f8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: do_renameat2+0x2b8/0x5e0 fs/namei.c:5311
3 locks held by syz.3.18/5265:
2 locks held by syz.3.18/5266:
#0: ffff888117b15420 (sb_writers#12){....}-{0:0}, at: do_renameat2+0x210/0x5e0 fs/namei.c:5306
#1: ffff888115c7e2f8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1108 [inline]
#1: ffff888115c7e2f8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: lock_rename fs/namei.c:3360 [inline]
#1: ffff888115c7e2f8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: do_renameat2+0x2b8/0x5e0 fs/namei.c:5311
3 locks held by syz.4.19/5411:
2 locks held by syz.4.19/5412:
#0: ffff88812760b420 (sb_writers#12){....}-{0:0}, at: do_renameat2+0x210/0x5e0 fs/namei.c:5306
#1: ffff8881269d1138 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1108 [inline]
#1: ffff8881269d1138 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: lock_rename fs/namei.c:3360 [inline]
#1: ffff8881269d1138 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: do_renameat2+0x2b8/0x5e0 fs/namei.c:5311
5 locks held by syz.5.20/5557:
2 locks held by syz.5.20/5558:
#0: ffff888116484420 (sb_writers#12){....}-{0:0}, at: do_renameat2+0x210/0x5e0 fs/namei.c:5306
#1: ffff8881269d5558 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1108 [inline]
#1: ffff8881269d5558 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: lock_rename fs/namei.c:3360 [inline]
#1: ffff8881269d5558 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: do_renameat2+0x2b8/0x5e0 fs/namei.c:5311
3 locks held by syz.6.21/5700:
2 locks held by syz.6.21/5701:
#0: ffff888109058420 (sb_writers#12){....}-{0:0}, at: do_renameat2+0x210/0x5e0 fs/namei.c:5306
#1: ffff888115c7ba18 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1108 [inline]
#1: ffff888115c7ba18 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: lock_rename fs/namei.c:3360 [inline]
#1: ffff888115c7ba18 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: do_renameat2+0x2b8/0x5e0 fs/namei.c:5311
3 locks held by syz.7.22/5843:
2 locks held by syz.7.22/5844:
#0: ffff8881134aa420 (sb_writers#12){....}-{0:0}, at: do_renameat2+0x210/0x5e0 fs/namei.c:5306
#1: ffff888115ca1ed8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1108 [inline]
#1: ffff888115ca1ed8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: lock_rename fs/namei.c:3360 [inline]
#1: ffff888115ca1ed8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: do_renameat2+0x2b8/0x5e0 fs/namei.c:5311
3 locks held by syz.8.23/5986:
2 locks held by syz.8.23/5987:
#0: ffff8881134ae420 (sb_writers#12){....}-{0:0}, at: do_renameat2+0x210/0x5e0 fs/namei.c:5306
#1: ffff888115ca7768 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1108 [inline]
#1: ffff888115ca7768 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: lock_rename fs/namei.c:3360 [inline]
#1: ffff888115ca7768 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: do_renameat2+0x2b8/0x5e0 fs/namei.c:5311
3 locks held by syz.9.24/6129:
2 locks held by syz.9.24/6130:
#0: ffff888124edd420 (sb_writers#12){....}-{0:0}, at: do_renameat2+0x210/0x5e0 fs/namei.c:5306
#1: ffff8881269b9ed8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1108 [inline]
#1: ffff8881269b9ed8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: lock_rename fs/namei.c:3360 [inline]
#1: ffff8881269b9ed8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: do_renameat2+0x2b8/0x5e0 fs/namei.c:5311
3 locks held by syz.0.25/6272:
2 locks held by syz.0.25/6273:
#0: ffff8881273f2420 (sb_writers#12){....}-{0:0}, at: do_renameat2+0x210/0x5e0 fs/namei.c:5306
#1: ffff8881269bd558 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1108 [inline]
#1: ffff8881269bd558 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: lock_rename fs/namei.c:3360 [inline]
#1: ffff8881269bd558 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: do_renameat2+0x2b8/0x5e0 fs/namei.c:5311
3 locks held by syz.1.26/6415:
2 locks held by syz.1.26/6417:
#0: ffff88811924d420 (sb_writers#12){....}-{0:0}, at: do_renameat2+0x210/0x5e0 fs/namei.c:5306
#1: ffff888127a78398 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1108 [inline]
#1: ffff888127a78398 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: lock_rename fs/namei.c:3360 [inline]
#1: ffff888127a78398 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: do_renameat2+0x2b8/0x5e0 fs/namei.c:5311
=============================================
NMI backtrace for cpu 1
CPU: 1 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:
dump_stack_lvl+0xa2/0xf0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x109/0x170 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x8e/0x140 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]
watchdog+0x573/0x5a0 kernel/hung_task.c:495
kthread+0x203/0x230 kernel/kthread.c:463
ret_from_fork+0x126/0x200 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5265 Comm: syz.3.18 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__lock_acquire+0x364/0x4c0 kernel/locking/lockdep.c:5270
Code: ff c0 89 83 88 0a 00 00 83 f8 30 0f 83 09 01 00 00 3b 05 97 4d a0 05 0f 87 4f 01 00 00 89 f8 48 83 c4 10 5b 41 5c 41 5d 41 5e <41> 5f 5d c3 cc cc cc cc cc e8 8e 84 01 00 48 c7 c7 fe bd c3 84 e8
RSP: 0018:ffffc90002bcfa30 EFLAGS: 00000082
RAX: 0000000000000001 RBX: 0000000000000246 RCX: 0000000096643f88
RDX: 6cf8600edd4e7d2a RSI: 000000004cfdb08e RDI: 0000000000000001
RBP: 00000000e7d35871 R08: 0000000000000000 R09: 00000000000002f1
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff85012818
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000003
FS: 00007f4bd3c7e6c0(0000) GS:ffff8881b5220000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f02ff286f98 CR3: 0000000116666000 CR4: 00000000003526f0
Call Trace:
lock_acquire+0xd6/0x200 kernel/locking/lockdep.c:5868
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
insert_inode_locked+0x223/0x270 fs/inode.c:1836
ntfs_new_inode+0x75/0xa0 fs/ntfs3/fsntfs.c:1681
ntfs_create_inode+0x245/0xe50 fs/ntfs3/inode.c:1306
ntfs_create+0x1e/0x30 fs/ntfs3/namei.c:110
lookup_open fs/namei.c:3796 [inline]
open_last_lookups fs/namei.c:3895 [inline]
path_openat+0x784/0xed0 fs/namei.c:4131
do_filp_open+0xc6/0x180 fs/namei.c:4161
do_sys_openat2+0x7c/0xd0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x7b/0xa0 fs/open.c:1463
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x8f/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4bd2d8f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4bd3c7e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f4bd2fe5fa0 RCX: 00007f4bd2d8f749
RDX: 000000000000275a RSI: 00002000000001c0 RDI: ffffffffffffff9c
RBP: 00007f4bd2e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4bd2fe6038 R14: 00007f4bd2fe5fa0 R15: 00007fffeda805a8