INFO: task syz-fuzzer:5092 blocked for more than 143 seconds.
Not tainted 6.9.0-rc7-next-20240506-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-fuzzer state:D
stack:25624 pid:5092 tgid:5086 ppid:5084 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a50 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:826 [inline]
do_unlinkat+0x26a/0x830 fs/namei.c:4394
__do_sys_unlinkat fs/namei.c:4450 [inline]
__se_sys_unlinkat fs/namei.c:4443 [inline]
__x64_sys_unlinkat+0xce/0xf0 fs/namei.c:4443
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x40720e
RSP: 002b:000000c000923828 EFLAGS: 00000206
ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: ffffffffffffff9c RCX: 000000000040720e
RDX: 0000000000000000 RSI: 000000c0001139e0 RDI: ffffffffffffff9c
RBP: 000000c000923868 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 000000c000ffa400 R14: 000000c0002a7a00 R15: 000000000000008a
Showing all locks held in the system:
3 locks held by kworker/0:0/8:
#0:
ffff888015080948
((wq_completion)events
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3206 [inline]
, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1:
ffffc900000d7d00
(deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
(deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffffffff8f5e5448 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
5 locks held by kworker/u8:0/11:
#0: ffff888015ed5948 (
(wq_completion)netns
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3206 [inline]
, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1:
ffffc90000107d00
(net_cleanup_work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3207 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffffffff8f5d8c10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:591
#3:
ffffffff8f5e5448 (rtnl_mutex){+.+.}-{3:3}
, at: default_device_exit_batch+0xe9/0xa90 net/core/dev.c:11747
#4:
ffffffff8e1ce3f0
(
cpu_hotplug_lock
){++++}-{0:0}
, at: flush_all_backlogs net/core/dev.c:5984 [inline]
, at: unregister_netdevice_many_notify+0x607/0x16e0 net/core/dev.c:11202
3 locks held by kworker/u8:1/12:
3 locks held by kworker/1:0/25:
5 locks held by kworker/1:0H/26:
1 lock held by khungtaskd/30:
#0:
ffffffff8e333da0
(rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:327 [inline]
(rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:839 [inline]
(rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/1:1/45:
5 locks held by kworker/u8:9/2474:
3 locks held by kworker/u8:10/2483:
#0:
ffff88802a284948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
ffff88802a284948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc90009e4fd00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc90009e4fd00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2:
ffffffff8f5e5448
(
rtnl_mutex
){+.+.}-{3:3}
, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4733
2 locks held by getty/4848:
#0: ffff88802ad870a0 (&tty->ldisc_sem){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1:
ffffc90002f162f0
(
&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by syz-fuzzer/5092:
#0:
ffff88802a95c420
(
sb_writers
#4
){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff888079f48400 (&type->i_mutex_dir_key#3
/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:826 [inline]
/1){+.+.}-{3:3}, at: do_unlinkat+0x26a/0x830 fs/namei.c:4394
3 locks held by syz-fuzzer/5093:
#0: ffff88802a95c420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1:
ffff888079f4c000
(
&type->i_mutex_dir_key
#3
/1
){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:826 [inline]
){+.+.}-{3:3}, at: do_rmdir+0x263/0x580 fs/namei.c:4261
#2:
ffff888079f4d400 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline]
ffff888079f4d400 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_rmdir+0x101/0x510 fs/namei.c:4203
1 lock held by syz-fuzzer/5104:
2 locks held by syz-fuzzer/5106:
#0:
ffff88802a95c420
(
sb_writers
#4
){.+.+}-{0:0}
, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff888079f48400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:826 [inline]
#1: ffff888079f48400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:3900
2 locks held by syz-fuzzer/5193:
#0: ffff88802a95c420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1:
ffff888079f48400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:826 [inline]
ffff888079f48400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x26a/0x830 fs/namei.c:4394
2 locks held by syz-fuzzer/5341:
#0: ffff88802a95c420 (sb_writers#4){.+.+}-{0:0}
, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffff8880b9428948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
3 locks held by kworker/0:4/5120:
#0:
ffff888015080948
((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1:
ffffc90003837d00
(
(linkwatch_work).work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3207 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffffffff8f5e5448
(
rtnl_mutex
){+.+.}-{3:3}
, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
2 locks held by kworker/1:5/5162:
7 locks held by kworker/1:6/5192:
2 locks held by syz-executor.0/6147:
#0:
ffff88802a95c420
(
sb_writers
#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88805e3df200
(&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:826 [inline]
(&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:3900
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.9.0-rc7-next-20240506-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xfde/0x1020 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
yealink 5-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_ctl_callback - urb status -71
NMI backtrace for cpu 1
CPU: 1 PID: 5161 Comm: kworker/1:4 Not tainted 6.9.0-rc7-next-20240506-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: 0x0 (mld)
RIP: 0010:io_serial_in+0x76/0xb0 drivers/tty/serial/8250/8250_port.c:406
Code: 10 b6 57 fc 89 e9 41 d3 e6 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 61 6b bd fc 44 03 33 44 89 f2 ec <0f> b6 c0 5b 41 5e 41 5f 5d c3 cc cc cc cc 89 e9 80 e1 07 38 c1 7c
RSP: 0018:ffffc90000a17258 EFLAGS: 00000002
RAX: 1ffffffff295a200 RBX: ffffffff94ad1180 RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000020
RBP: 0000000000000000 R08: ffffffff853e6316 R09: 1ffff11003f33046
R10: dffffc0000000000 R11: ffffffff853e62d0 R12: dffffc0000000000
R13: 00000000000026c3 R14: 00000000000003fd R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32b22000 CR3: 000000000e132000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
serial_in drivers/tty/serial/8250/8250.h:117 [inline]
serial_lsr_in drivers/tty/serial/8250/8250.h:139 [inline]
wait_for_lsr drivers/tty/serial/8250/8250_port.c:2068 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3315 [inline]
serial8250_console_write+0x1099/0x1770 drivers/tty/serial/8250/8250_port.c:3393
console_emit_next_record kernel/printk/printk.c:2928 [inline]
console_flush_all+0x865/0xfd0 kernel/printk/printk.c:2994
console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3063
vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2345
dev_vprintk_emit+0x2ae/0x330 drivers/base/core.c:4942
dev_printk_emit+0xdd/0x120 drivers/base/core.c:4953
_dev_err+0x122/0x170 drivers/base/core.c:5008
urb_ctl_callback+0x1d3/0x290 drivers/input/misc/yealink.c:454
__usb_hcd_giveback_urb+0x373/0x530 drivers/usb/core/hcd.c:1648
dummy_timer+0x830/0x45d0 drivers/usb/gadget/udc/dummy_hcd.c:1987
__run_hrtimer kernel/time/hrtimer.c:1687 [inline]
__hrtimer_run_queues+0x5a5/0xd50 kernel/time/hrtimer.c:1751
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1813
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:queue_work_on+0x269/0x380 kernel/workqueue.c:2415
Code: 75 19 e8 9a 8f 36 00 eb 18 e8 93 8f 36 00 e8 5e 05 2a 0a 48 83 7c 24 10 00 74 e7 e8 81 8f 36 00 fb 48 c7 44 24 20 0e 36 e0 45 <4b> c7 04 37 00 00 00 00 43 c7 44 37 09 00 00 00 00 66 43 c7 44 37
RSP: 0018:ffffc90000a18280 EFLAGS: 00000246
RAX: ffffffff815f89af RBX: 0000000000000000 RCX: ffff888022499e00
RDX: 0000000000000302 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000a18378 R08: ffffffff815f897f R09: 1ffffffff25f56cf
R10: dffffc0000000000 R11: fffffbfff25f56d0 R12: 0000000002000001
R13: 0000000000000046 R14: 1ffff92000143054 R15: dffffc0000000000
__ieee80211_queue_skb_to_iface net/mac80211/rx.c:233 [inline]
ieee80211_queue_skb_to_iface net/mac80211/rx.c:244 [inline]
ieee80211_rx_h_mgmt+0x50f/0x710 net/mac80211/rx.c:4047
ieee80211_rx_handlers+0x6a9d/0xb820 net/mac80211/rx.c:4205
ieee80211_invoke_rx_handlers net/mac80211/rx.c:4235 [inline]
ieee80211_prepare_and_rx_handle+0x31ab/0x6360 net/mac80211/rx.c:5083
__ieee80211_rx_handle_packet net/mac80211/rx.c:5324 [inline]
ieee80211_rx_list+0x2cde/0x3780 net/mac80211/rx.c:5459
ieee80211_rx_napi+0x18a/0x3c0 net/mac80211/rx.c:5482
ieee80211_rx include/net/mac80211.h:5093 [inline]
ieee80211_tasklet_handler+0xeb/0x1f0 net/mac80211/main.c:438
tasklet_action_common+0x321/0x4d0 kernel/softirq.c:785
handle_softirqs+0x2d6/0x990 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:raw_spin_rq_unlock_irq+0x19/0x90 kernel/sched/sched.h:1419
Code: 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 53 48 89 fb 66 90 48 89 df e8 1e 32 2c 0a e8 e9 27 35 00 fb 5b <41> 5e 41 5f c3 cc cc cc cc f3 0f 1e fa 49 bf 00 00 00 00 00 fc ff
RSP: 0018:ffffc90003797b68 EFLAGS: 00000286
RAX: 9a5c0af520099700 RBX: ffff8880b953e7c0 RCX: ffffffff947a3603
RDX: dffffc0000000000 RSI: ffffffff8bcab340 RDI: ffffffff8c1fca80
RBP: ffffc90003797d88 R08: ffffffff8fad0e2f R09: 1ffffffff1f5a1c5
R10: dffffc0000000000 R11: fffffbfff1f5a1c6 R12: ffffc90003797d10
R13: 0000000000000000 R14: ffff88802249a570 R15: ffff888022499e00
__schedule+0x1a22/0x4a50 kernel/sched/core.c:6749
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
worker_thread+0xa2c/0xd70 kernel/workqueue.c:3408
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244