INFO: task kworker/u10:0:22969 blocked for more than 143 seconds.
Tainted: G U 6.16.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u10:0 state:D stack:26968 pid:22969 tgid:22969 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x116a/0x5dd0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6879
schedule_timeout+0x257/0x290 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x2ff/0x4e0 kernel/sched/completion.c:116
__flush_workqueue+0x3e2/0x1230 kernel/workqueue.c:4002
rds_tcp_listen_stop+0x104/0x150 net/rds/tcp_listen.c:351
rds_tcp_kill_sock net/rds/tcp.c:611 [inline]
rds_tcp_exit_net+0xcb/0x810 net/rds/tcp.c:634
ops_exit_list net/core/net_namespace.c:200 [inline]
ops_undo_list+0x2eb/0xab0 net/core/net_namespace.c:253
cleanup_net+0x408/0x890 net/core/net_namespace.c:686
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e5c4c80 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e5c4c80 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e5c4c80 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6770
4 locks held by klogd/5205:
2 locks held by syz-executor/5832:
3 locks held by kworker/u10:0/22969:
#0: ffff88801c6fe148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
#1: ffffc9000cb0fd10 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
#2: ffffffff90349e50 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xad/0x890 net/core/net_namespace.c:662
2 locks held by kworker/u10:2/22974:
#0: ffff88801fb53948 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
#1: ffffc9000215fd10 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
1 lock held by syz.3.4434/23853:
#0: ffffffff90349e50 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x286/0x5f0 net/core/net_namespace.c:570
1 lock held by syz.2.4530/24186:
#0: ffffffff90349e50 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x286/0x5f0 net/core/net_namespace.c:570
1 lock held by syz.0.4664/24737:
#0: ffffffff90349e50 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x286/0x5f0 net/core/net_namespace.c:570
2 locks held by getty/25058:
#0: ffff888035e9a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90004c072f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222
1 lock held by syz.7.4834/25507:
#0: ffffffff90349e50 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x286/0x5f0 net/core/net_namespace.c:570
3 locks held by syz-executor/25758:
#0: ffffffff8f7106e0 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:161 [inline]
#0: ffffffff8f7106e0 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:253 [inline]
#0: ffffffff8f7106e0 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x113/0x2c0 net/core/rtnetlink.c:574
#1: ffffffff9035fea8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#1: ffffffff9035fea8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
#1: ffffffff9035fea8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x600/0x2000 net/core/rtnetlink.c:4054
#2: ffffffff8e5d0278 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a3/0x3c0 kernel/rcu/tree_exp.h:336
10 locks held by syz.6.4888/25801:
#0: ffff888029f0a2b8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x2a2/0x370 fs/file.c:1217
#1: ffff88803634c428 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0x12a/0x250 fs/read_write.c:738
#2: ffff888084a9bc88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x28f/0x510 fs/kernfs/file.c:325
#3: ffff88802aa8c2d8 (kn->active#62){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2b2/0x510 fs/kernfs/file.c:326
#4: ffff888146fa1710 (&atkbd->mutex){+.+.}-{4:4}, at: class_mutex_intr_constructor include/linux/mutex.h:227 [inline]
#4: ffff888146fa1710 (&atkbd->mutex){+.+.}-{4:4}, at: atkbd_attr_set_helper drivers/input/keyboard/atkbd.c:1463 [inline]
#4: ffff888146fa1710 (&atkbd->mutex){+.+.}-{4:4}, at: atkbd_do_set_scroll+0xab/0x530 drivers/input/keyboard/atkbd.c:277
#5: ffffffff8fb804a8 (input_mutex){+.+.}-{4:4}, at: class_mutex_intr_constructor include/linux/mutex.h:227 [inline]
#5: ffffffff8fb804a8 (input_mutex){+.+.}-{4:4}, at: input_register_device+0x98a/0x1130 drivers/input/input.c:2408
#6: ffff88808bf408c0 (&led_cdev->led_access){+.+.}-{4:4}, at: led_classdev_register_ext+0x519/0xa10 drivers/leds/led-class.c:524
#7: ffffffff8f1d67d0 (triggers_list_lock){++++}-{4:4}, at: led_trigger_set_default drivers/leds/led-triggers.c:297 [inline]
#7: ffffffff8f1d67d0 (triggers_list_lock){++++}-{4:4}, at: led_trigger_set_default+0x89/0x2e0 drivers/leds/led-triggers.c:284
#8: ffff88808bf407d8 (&led_cdev->trigger_lock){+.+.}-{4:4}, at: led_trigger_set_default drivers/leds/led-triggers.c:298 [inline]
#8: ffff88808bf407d8 (&led_cdev->trigger_lock){+.+.}-{4:4}, at: led_trigger_set_default+0x92/0x2e0 drivers/leds/led-triggers.c:284
#9: ffffffff8e5d0278 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a3/0x3c0 kernel/rcu/tree_exp.h:336
1 lock held by syz.6.4888/25806:
#0: ffff888029f0a2b8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x2a2/0x370 fs/file.c:1217
1 lock held by syz.5.4889/25803:
1 lock held by syz.5.4889/25812:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Tainted: G U 6.16.0-rc7-syzkaller #0 PREEMPT(full)
Tainted: [U]=USER
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xf70/0x12c0 kernel/hung_task.c:470
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 25810 Comm: syz.4.4890 Tainted: G U 6.16.0-rc7-syzkaller #0 PREEMPT(full)
Tainted: [U]=USER
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:timekeeping_cycles_to_ns kernel/time/timekeeping.c:355 [inline]
RIP: 0010:timekeeping_get_ns kernel/time/timekeeping.c:360 [inline]
RIP: 0010:ktime_get+0x169/0x310 kernel/time/timekeeping.c:778
Code: 82 ef 00 00 00 e8 f7 39 12 00 8b 05 b1 be 35 19 bf 3f 00 00 00 44 8b 35 a9 be 35 19 44 89 f6 48 0f af d8 48 03 1d 9f be 35 19 12 35 12 00 41 83 fe 3f 0f 87 12 60 77 ff e8 c3 39 12 00 44 89
RSP: 0018:ffffc90004b87b90 EFLAGS: 00000012
RAX: 0000000000745d1e RBX: 001d3cc41f348ca1 RCX: ffffffff81a91acb
RDX: ffff88804bbf1e00 RSI: 0000000000000018 RDI: 000000000000003f
RBP: 000000000003c8a8 R08: 0000000000000006 R09: 0000000001612b67
R10: 000001fb63109b96 R11: 0000000000000001 R12: 00000126b2884c06
R13: dffffc0000000000 R14: 0000000000000018 R15: 000001fb63109b96
FS: 00005555666b5500(0000) GS:ffff88812482d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa258fc1200 CR3: 000000008c840000 CR4: 00000000003526f0
Call Trace:
__hrtimer_start_range_ns kernel/time/hrtimer.c:1256 [inline]
hrtimer_start_range_ns+0x27b/0xfc0 kernel/time/hrtimer.c:1329
hrtimer_start_expires include/linux/hrtimer.h:277 [inline]
hrtimer_sleeper_start_expires kernel/time/hrtimer.c:2023 [inline]
do_nanosleep+0x1f7/0x570 kernel/time/hrtimer.c:2097
hrtimer_nanosleep+0x155/0x380 kernel/time/hrtimer.c:2147
common_nsleep+0xa1/0xd0 kernel/time/posix-timers.c:1353
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1399 [inline]
__se_sys_clock_nanosleep kernel/time/posix-timers.c:1376 [inline]
__x64_sys_clock_nanosleep+0x34d/0x4a0 kernel/time/posix-timers.c:1376
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa258fc1265
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 54 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f 55 ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007fff9bb0a570 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00007fa2591b5fa0 RCX: 00007fa258fc1265
RDX: 00007fff9bb0a5b0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fa2591b7ba0 R08: 0000000000000000 R09: 00007fa259dc1000
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000013548d
R13: 00007fa2591b6080 R14: ffffffffffffffff R15: 00007fff9bb0a6f0