INFO: task syz.6.2072:10724 blocked for more than 143 seconds.
Not tainted 6.1.135-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.2072 state:D stack:24384 pid:10724 ppid:7212 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
perf_pending_task_sync kernel/events/core.c:5033 [inline]
_free_event+0x171/0x10a0 kernel/events/core.c:5039
put_event kernel/events/core.c:5164 [inline]
perf_event_release_kernel+0x832/0x8c0 kernel/events/core.c:5289
perf_release+0x37/0x40 kernel/events/core.c:5299
__fput+0x22c/0x920 fs/file_table.c:320
task_work_run+0x1ca/0x250 kernel/task_work.c:203
exit_task_work include/linux/task_work.h:39 [inline]
do_exit+0x936/0x2400 kernel/exit.c:871
do_group_exit+0x217/0x2d0 kernel/exit.c:1021
get_signal+0x1272/0x1350 kernel/signal.c:2871
arch_do_signal_or_restart+0xb0/0x1230 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2a8618e969
RSP: 002b:00007f2a870e9fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: fffffffffffffff4 RBX: 00007f2a863b5fa0 RCX: 00007f2a8618e969
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000005000000
RBP: 00007f2a86210ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2a863b5fa0 R15: 00007ffc67585e38
Showing all locks held in the system:
3 locks held by kworker/u4:1/11:
#0: ffff888017479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc90000107d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:263
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c92b370 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c92bb90 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8c92a9e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8c92a9e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8c92a9e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
2 locks held by syslogd/3605:
#0: ffff8880b8f3aa58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
#1: ffffffff8c92a9e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#1: ffffffff8c92a9e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#1: ffffffff8c92a9e0 (rcu_read_lock){....}-{1:2}, at: do_perf_sw_event kernel/events/core.c:9683 [inline]
#1: ffffffff8c92a9e0 (rcu_read_lock){....}-{1:2}, at: ___perf_sw_event+0x13c/0x630 kernel/events/core.c:9721
1 lock held by klogd/3612:
#0: ffff8880b8f3aa58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
2 locks held by getty/4009:
#0: ffff888030be8098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000325e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41b/0x1380 drivers/tty/n_tty.c:2198
2 locks held by kworker/0:4/4295:
#0: ffff888017472138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc900046c7d00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
3 locks held by kworker/1:5/4297:
#0: ffff88802f66e138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc900041a7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xc4/0x14d0 net/ipv6/addrconf.c:4134
4 locks held by kworker/u4:7/4335:
#0: ffff888017616938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc900048cfd00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffffffff8db26c10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x132/0xb80 net/core/net_namespace.c:594
#3: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_delete_nets+0xc8/0x360 net/ipv4/ip_tunnel.c:1166
2 locks held by kworker/u4:10/4904:
1 lock held by syz.4.2632/12481:
#0: ffffffff8c930580 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x600 kernel/rcu/tree.c:4019
2 locks held by syz.5.2631/12483:
#0: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline]
#0: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3d/0x1b0 drivers/net/tun.c:3492
#1: ffffffff8c9306b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#1: ffffffff8c9306b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x455/0x830 kernel/rcu/tree_exp.h:962
1 lock held by syz.8.2640/12510:
#0: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x3ab/0x1e10 drivers/net/tun.c:3104
1 lock held by syz.8.2640/12512:
#0: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x567/0xea0 net/core/dev_ioctl.c:587
1 lock held by syz.9.2641/12516:
#0: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x3ab/0x1e10 drivers/net/tun.c:3104
1 lock held by syz.9.2641/12517:
#0: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x3ab/0x1e10 drivers/net/tun.c:3104
1 lock held by syz.9.2641/12520:
#0: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: tun_set_queue drivers/net/tun.c:2975 [inline]
#0: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x361/0x1e10 drivers/net/tun.c:3097
1 lock held by syz.9.2641/12521:
#0: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: tun_set_queue drivers/net/tun.c:2975 [inline]
#0: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x361/0x1e10 drivers/net/tun.c:3097
1 lock held by syz.7.2643/12523:
#0: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline]
#0: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3d/0x1b0 drivers/net/tun.c:3492
1 lock held by syz.7.2643/12525:
#0: ffffffff8db33868 (rtnl_mutex){+.+.}-{3:3}, at: dev_ethtool+0x1c1/0x1140 net/ethtool/ioctl.c:3044
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.135-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call Trace:
dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3f4/0x470 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 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+0xeee/0xf30 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 46 Comm: kworker/u4:3 Not tainted 6.1.135-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: phy11 ieee80211_iface_work
RIP: 0010:ieee80211_sta_last_active+0x1/0x2a0 net/mac80211/sta_info.c:2788
Code: ff ff e8 b2 b8 fa f7 eb 05 e8 ab b8 fa f7 48 8b 7c 24 28 48 83 c4 68 5b 41 5c 41 5d 41 5e 41 5f 5d e9 43 c7 91 00 0f 1f 00 55 <41> 57 41 56 41 55 41 54 53 48 83 ec 20 49 89 fe 48 bd 00 00 00 00
RSP: 0018:ffffc90000b77a90 EFLAGS: 00000246
RAX: 1ffff1100ab4b000 RBX: ffff888055961718 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8abf0e80 RDI: ffff888055a58000
RBP: ffffc90000b77c30 R08: dffffc0000000000 R09: fffffbfff1bfcf4e
R10: fffffbfff1bfcf4e R11: 1ffffffff1bfcf4d R12: ffff888055a58000
R13: ffff888026c50c80 R14: dffffc0000000000 R15: ffff8880559617f0
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555828125c8 CR3: 000000007e68c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
ieee80211_ibss_sta_expire net/mac80211/ibss.c:1259 [inline]
ieee80211_sta_merge_ibss net/mac80211/ibss.c:1299 [inline]
ieee80211_ibss_work+0x60c/0x10b0 net/mac80211/ibss.c:1708
process_one_work+0x898/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295