INFO: task syz-executor165:16783 blocked for more than 143 seconds.
Not tainted 6.8.0-rc1-syzkaller-00169-gecb1b8288dc7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor165 state:D stack:25072 pid:16783 tgid:16781 ppid:5116 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x4960 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6874
rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:837 [inline]
filename_create+0x260/0x530 fs/namei.c:3891
do_mkdirat+0xbd/0x3a0 fs/namei.c:4137
__do_sys_mkdir fs/namei.c:4165 [inline]
__se_sys_mkdir fs/namei.c:4163 [inline]
__x64_sys_mkdir+0x6e/0x80 fs/namei.c:4163
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f2c00e23979
RSP: 002b:00007f2c00dd2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f2c00eab4a8 RCX: 00007f2c00e23979
RDX: 00007f2c00e23979 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007f2c00eab4a0 R08: 00007f2c00dd26c0 R09: 0000000000000000
R10: 00000000000014d8 R11: 0000000000000246 R12: 00007f2c00eab4ac
R13: 000000000000000b R14: 00007ffcbdd57510 R15: 00007ffcbdd575f8
INFO: task syz-executor165:16865 blocked for more than 144 seconds.
Not tainted 6.8.0-rc1-syzkaller-00169-gecb1b8288dc7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor165 state:D stack:25072 pid:16865 tgid:16863 ppid:5120 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x4960 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6874
rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:837 [inline]
filename_create+0x260/0x530 fs/namei.c:3891
do_mkdirat+0xbd/0x3a0 fs/namei.c:4137
__do_sys_mkdir fs/namei.c:4165 [inline]
__se_sys_mkdir fs/namei.c:4163 [inline]
__x64_sys_mkdir+0x6e/0x80 fs/namei.c:4163
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f2c00e23979
RSP: 002b:00007f2c00dd2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f2c00eab4a8 RCX: 00007f2c00e23979
RDX: 00007f2c00e23979 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007f2c00eab4a0 R08: 00007f2c00dd26c0 R09: 0000000000000000
R10: 00007f2c00dd26c0 R11: 0000000000000246 R12: 00007f2c00eab4ac
R13: 000000000000000b R14: 00007ffcbdd57510 R15: 00007ffcbdd575f8
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92ef20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d92ef20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d92ef20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4812:
#0: ffff88802a0990a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
4 locks held by kworker/u4:3/5194:
2 locks held by kworker/u4:5/5460:
#0: ffff888013089938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff888013089938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffff8880b9928988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
2 locks held by udevd/10095:
2 locks held by syz-executor165/16783:
#0: ffff88807d44e420 (sb_writers#11){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff888073ccd7a0 (&sb->s_type->i_mutex_key#17/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff888073ccd7a0 (&sb->s_type->i_mutex_key#17/1){+.+.}-{3:3}, at: filename_create+0x260/0x530 fs/namei.c:3891
5 locks held by syz-executor165/16792:
2 locks held by syz-executor165/16865:
#0: ffff88801c42c420 (sb_writers#11){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff888073f2eb38 (&sb->s_type->i_mutex_key#17/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff888073f2eb38 (&sb->s_type->i_mutex_key#17/1){+.+.}-{3:3}, at: filename_create+0x260/0x530 fs/namei.c:3891
3 locks held by syz-executor165/16870:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc1-syzkaller-00169-gecb1b8288dc7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x310 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4464 Comm: kworker/0:3 Not tainted 6.8.0-rc1-syzkaller-00169-gecb1b8288dc7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: 0x0 (events)
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline]
RIP: 0010:rcu_is_watching+0x10/0xb0 kernel/rcu/tree.c:700
Code: e6 b8 4e 03 e9 2b ff ff ff e8 dc 9d af 09 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 41 57 41 56 53 65 ff 05 38 bf 8c 7e bb b9 af 09 89 c3 83 f8 08 73 76 49 bf 00 00 00 00 00 fc ff df
RSP: 0018:ffffc9000d667900 EFLAGS: 00000087
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff816db1a0
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8f023ae8
RBP: ffffc9000d667a50 R08: ffffffff8f023aef R09: 1ffffffff1e0475d
R10: dffffc0000000000 R11: fffffbfff1e0475e R12: 1ffff92001accf30
R13: ffffffff849415b1 R14: ffffc9000d667a80 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2c00ea4c14 CR3: 000000000d732000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0xbf/0x9c0 kernel/locking/lockdep.c:5765
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x79/0x140 kernel/locking/spinlock.c:194
debug_object_deactivate+0x2d1/0x380 lib/debugobjects.c:778
debug_work_deactivate kernel/workqueue.c:583 [inline]
process_one_work kernel/workqueue.c:2563 [inline]
process_scheduled_works+0x335/0x1420 kernel/workqueue.c:2706
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242