INFO: task kworker/0:7:4681 blocked for more than 143 seconds.
Not tainted 6.8.0-rc1-syzkaller-00005-g610347effc2e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:7 state:D stack:23648 pid:4681 tgid:4681 ppid:2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf12/0x5c00 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6817
usb_kill_urb.part.0+0x1c6/0x250 drivers/usb/core/urb.c:713
usb_kill_urb+0x83/0xa0 drivers/usb/core/urb.c:702
usb_start_wait_urb+0x251/0x4c0 drivers/usb/core/message.c:65
usb_internal_control_msg drivers/usb/core/message.c:103 [inline]
usb_control_msg+0x327/0x4a0 drivers/usb/core/message.c:154
get_bMaxPacketSize0.constprop.0+0xa5/0x1c0 drivers/usb/core/hub.c:4750
hub_port_init+0x68c/0x39e0 drivers/usb/core/hub.c:4946
hub_port_connect drivers/usb/core/hub.c:5394 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5605 [inline]
port_event drivers/usb/core/hub.c:5765 [inline]
hub_event+0x2b61/0x4e10 drivers/usb/core/hub.c:5847
process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2706 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d1acba0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d1acba0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d1acba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4807:
#0: ffff88802e1180a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201
3 locks held by syz-fuzzer/7391:
1 lock held by syz-executor.5/5103:
3 locks held by kworker/0:8/18611:
#0: ffff888013088d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608
#1: ffffc90004b47d80 (fqdir_free_work){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609
#2: ffffffff8d1b82c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x6c0 kernel/rcu/tree.c:4032
2 locks held by kworker/u4:2/966:
#0: ffff888013089938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608
#1: ffffc90004f37d80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609
5 locks held by kworker/0:7/4681:
#0: ffff8880137c1938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608
#1: ffffc9000577fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609
#2: ffff8880229d7190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#2: ffff8880229d7190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4e10 drivers/usb/core/hub.c:5793
#3: ffff8880229fa510 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3151 [inline]
#3: ffff8880229fa510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5362 [inline]
#3: ffff8880229fa510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5605 [inline]
#3: ffff8880229fa510 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5765 [inline]
#3: ffff8880229fa510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x27fe/0x4e10 drivers/usb/core/hub.c:5847
#4: ffff8880228f79f8 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5363 [inline]
#4: ffff8880228f79f8 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5605 [inline]
#4: ffff8880228f79f8 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5765 [inline]
#4: ffff8880228f79f8 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x2827/0x4e10 drivers/usb/core/hub.c:5847
3 locks held by kworker/1:13/5408:
2 locks held by kworker/u4:9/7364:
#0: ffff888013089938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608
#1: ffffc900049c7d80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609
6 locks held by kworker/u4:1/15671:
4 locks held by kworker/u4:7/15673:
2 locks held by kworker/u4:10/15675:
1 lock held by syz-executor.4/21100:
#0: ffff88807f1fd720 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:124 [inline]
#0: ffff88807f1fd720 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x15d/0x3c0 mm/util.c:554
2 locks held by syz-executor.4/21101:
1 lock held by syz-executor.1/21117:
#0: ffff88807c3373a0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:124 [inline]
#0: ffff88807c3373a0 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x15d/0x3c0 mm/util.c:554
1 lock held by syz-executor.1/21118:
1 lock held by syz-executor.2/21123:
1 lock held by syz-executor.2/21127:
#0: ffff88802d6c14a0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock_killable include/linux/mmap_lock.h:155 [inline]
#0: ffff88802d6c14a0 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5486 [inline]
#0: ffff88802d6c14a0 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x352/0x580 mm/memory.c:5537
5 locks held by syz-executor.2/21132:
1 lock held by syz-executor.3/21125:
2 locks held by syz-executor.0/21130:
#0: ffff88804093d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffff88804093d130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:954 [inline]
#1: ffff88804093d130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: iterate_tty_write drivers/tty/tty_io.c:973 [inline]
#1: ffff88804093d130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x293/0x9b0 drivers/tty/tty_io.c:1096
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc1-syzkaller-00005-g610347effc2e #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+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 15673 Comm: kworker/u4:7 Not tainted 6.8.0-rc1-syzkaller-00005-g610347effc2e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: netns cleanup_net
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xd/0x60 kernel/kcov.c:207
Code: fa 48 8b be b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 65 48 8b 14 25 80 c2 03 00 <65> 8b 05 14 a0 7b 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74
RSP: 0018:ffffc90009c47630 EFLAGS: 00000293
RAX: ffffc90009c47f08 RBX: ffffc90009c47700 RCX: ffffffff813a4336
RDX: ffff88804151d940 RSI: ffffffff813a4477 RDI: 0000000000000005
RBP: ffffc90009c47f00 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000003 R12: ffffc90009c47708
R13: ffffc90009c47710 R14: ffffc90009c40000 R15: ffffc90009c48000
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000031527000 CR3: 000000002f1d7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_stack arch/x86/include/asm/stacktrace.h:60 [inline]
stack_access_ok+0x1f1/0x270 arch/x86/kernel/unwind_orc.c:393
deref_stack_reg arch/x86/kernel/unwind_orc.c:403 [inline]
unwind_next_frame+0x1a98/0x2390 arch/x86/kernel/unwind_orc.c:648
arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
__kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:586
__call_rcu_common.constprop.0+0x9a/0x7b0 kernel/rcu/tree.c:2683
security_inode_free+0x9e/0xc0 security/security.c:1616
__destroy_inode+0x1f8/0x740 fs/inode.c:285
destroy_inode+0x91/0x1b0 fs/inode.c:308
iput_final fs/inode.c:1739 [inline]
iput.part.0+0x560/0x7b0 fs/inode.c:1765
iput+0x5c/0x80 fs/inode.c:1755
__sock_release net/socket.c:671 [inline]
sock_release+0x176/0x1d0 net/socket.c:687
netlink_kernel_release+0x4e/0x60 net/netlink/af_netlink.c:2094
diag_net_exit+0x38/0x80 net/core/sock_diag.c:328
ops_exit_list+0xb0/0x170 net/core/net_namespace.c:170
cleanup_net+0x505/0xb20 net/core/net_namespace.c:618
process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2706 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242