INFO: task syz-executor.3:3767 blocked for more than 143 seconds.
Not tainted 6.1.0-syzkaller-00071-g3a28c2c89f4b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:26056 pid:3767 ppid:3680 flags:0x00104000
Call Trace:
context_switch kernel/sched/core.c:5209 [inline]
__schedule+0x8fc/0xda0 kernel/sched/core.c:6521
schedule+0xcb/0x190 kernel/sched/core.c:6597
schedule_timeout+0xac/0x300 kernel/time/timer.c:1911
do_wait_for_common+0x3ea/0x560 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x46/0x60 kernel/sched/completion.c:138
io_wq_exit_workers io_uring/io-wq.c:1253 [inline]
io_wq_put_and_exit+0x5bf/0xca0 io_uring/io-wq.c:1288
io_uring_clean_tctx+0x164/0x1d0 io_uring/tctx.c:193
io_uring_cancel_generic+0x60e/0x66f io_uring/io_uring.c:3022
io_uring_files_cancel include/linux/io_uring.h:54 [inline]
do_exit+0x290/0x2070 kernel/exit.c:775
do_group_exit+0x1fd/0x2b0 kernel/exit.c:950
get_signal+0x1743/0x1810 kernel/signal.c:2858
arch_do_signal_or_restart+0x8d/0x750 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop+0x74/0x160 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x2e/0x60 kernel/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd47e48c0d9
RSP: 002b:00007fd47f1a2218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fd47e5abf88 RCX: 00007fd47e48c0d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd47e5abf88
RBP: 00007fd47e5abf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd47e5abf8c
R13: 00007fff2f58fa8f R14: 00007fd47f1a2300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d323ff0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d3247f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8d323e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3313:
#0: ffff888017b1a098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2177
5 locks held by kworker/u4:6/3835:
#0: ffff8880129c3138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262
#1: ffffc900050efd00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264
#2: ffffffff8e457950 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf0/0xc50 net/core/net_namespace.c:563
#3: ffff888050c212f8 (&devlink->lock_key#8){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0x13e/0x2f0 net/core/devlink.c:12509
#4: ffffffff8d329300 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x5f0 kernel/rcu/tree.c:3995
1 lock held by iou-wrk-3767/3798:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.0-syzkaller-00071-g3a28c2c89f4b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e3/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x19b/0x3e0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xcf5/0xd40 kernel/hung_task.c:377
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3835 Comm: kworker/u4:6 Not tainted 6.1.0-syzkaller-00071-g3a28c2c89f4b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: netns cleanup_net
RIP: 0010:unwind_next_frame+0xd8e/0x24c0 arch/x86/kernel/unwind_orc.c:547
Code: b4 24 90 00 00 00 48 8b ac 24 88 00 00 00 74 12 48 89 df e8 e4 23 a4 00 48 b9 00 00 00 00 00 fc ff df 48 8b 44 24 08 48 89 03 <8a> 44 0d 00 84 c0 4c 8b 6c 24 38 48 8b 6c 24 50 0f 85 9e 13 00 00
RSP: 0018:ffffc900050ef180 EFLAGS: 00000246
RAX: ffffc900050ef8a0 RBX: ffffc900050ef298 RCX: dffffc0000000000
RDX: ffffffff8f239350 RSI: 0000000000000000 RDI: ffffc900050ef898
RBP: 1ffff92000a1de52 R08: 0000000000000005 R09: dffffc0000000000
R10: fffff52000a1de58 R11: 1ffff92000a1de56 R12: ffffc900050ef260
R13: ffffc900050ef898 R14: ffffc900050ef295 R15: 1ffff92000a1de4d
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c002b7b010 CR3: 000000000d08e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x112/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x12d/0x1f0 kernel/stacktrace.c:122
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:481
__call_rcu_common kernel/rcu/tree.c:2753 [inline]
call_rcu+0x163/0xab0 kernel/rcu/tree.c:2866
__dentry_kill+0x3b1/0x5b0 fs/dcache.c:607
dentry_kill+0xbb/0x290
dput+0x1f3/0x410 fs/dcache.c:913
find_next_child fs/libfs.c:265 [inline]
simple_recursive_removal+0x2bf/0x860 fs/libfs.c:280
debugfs_remove+0x45/0x60 fs/debugfs/inode.c:765
nsim_dev_port_debugfs_exit drivers/net/netdevsim/dev.c:429 [inline]
__nsim_dev_port_del+0x178/0x1b0 drivers/net/netdevsim/dev.c:1434
nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1445 [inline]
nsim_dev_reload_destroy+0x292/0x490 drivers/net/netdevsim/dev.c:1662
nsim_dev_reload_down+0x93/0xc0 drivers/net/netdevsim/dev.c:968
devlink_reload+0x1e1/0x660 net/core/devlink.c:4489
devlink_pernet_pre_exit+0x15c/0x2f0 net/core/devlink.c:12510
ops_pre_exit_list net/core/net_namespace.c:159 [inline]
cleanup_net+0x608/0xc50 net/core/net_namespace.c:589
process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306