INFO: task syz-executor.0:12053 blocked for more than 143 seconds.
Not tainted 6.9.0-rc5-syzkaller-00031-g71b1543c83d6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27168 pid:12053 tgid:12046 ppid:9548 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
super_lock+0x2bb/0x3f0 fs/super.c:114
user_get_super+0xee/0x230 fs/super.c:988
quotactl_block+0x3d2/0x680 fs/quota/quota.c:890
__do_sys_quotactl fs/quota/quota.c:955 [inline]
__se_sys_quotactl fs/quota/quota.c:917 [inline]
__x64_sys_quotactl+0x173/0x440 fs/quota/quota.c:917
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f52fd07dea9
RSP: 002b:00007f52fdd560c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f52fd1ac050 RCX: 00007f52fd07dea9
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: ffffffff80000800
RBP: 00007f52fd0ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000100 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f52fd1ac050 R15: 00007ffee9219618
Showing all locks held in the system:
2 locks held by kworker/u8:1/11:
1 lock held by khungtaskd/29:
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by kworker/u8:4/60:
#0: ffff8880b953ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
#1: ffff8880b9528a08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2d9/0x900 kernel/sched/psi.c:988
4 locks held by kworker/u8:5/746:
2 locks held by getty/4830:
#0: ffff88802b0060a0 (&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+0xfc8/0x1490 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.0/9387:
3 locks held by kworker/0:1/12877:
#0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc90003207d80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffffffff8f2fff48 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:276
1 lock held by syz-executor.1/13829:
2 locks held by syz-executor.3/13839:
#0: ffffffff8f2fff48 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline]
#0: ffffffff8f2fff48 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x250 drivers/net/tun.c:3500
#1: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#1: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x682/0x7a0 kernel/rcu/tree_exp.h:939
1 lock held by syz-executor.2/13860:
#0: ffffffff8f2fff48 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x4fc/0x4770 drivers/net/tun.c:3110
1 lock held by syz-executor.2/13864:
#0: ffffffff8f2fff48 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x62d/0x4770 drivers/net/tun.c:3110
1 lock held by syz-executor.2/13865:
#0: ffffffff8f2fff48 (rtnl_mutex){+.+.}-{3:3}, at: do_ipv6_setsockopt+0x2162/0x47b0 net/ipv6/ipv6_sockglue.c:567
1 lock held by syz-executor.0/13869:
#0: ffffffff8f2fff48 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x4fc/0x4770 drivers/net/tun.c:3110
1 lock held by syz-executor.0/13870:
#0: ffffffff8f2fff48 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x62d/0x4770 drivers/net/tun.c:3110
1 lock held by syz-executor.0/13871:
#0: ffffffff8f2fff48 (rtnl_mutex){+.+.}-{3:3}, at: do_ipv6_setsockopt+0x2162/0x47b0 net/ipv6/ipv6_sockglue.c:567
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00031-g71b1543c83d6 #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+0x116/0x1f0 lib/dump_stack.c:114
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:380
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 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:
NMI backtrace for cpu 1
CPU: 1 PID: 746 Comm: kworker/u8:5 Not tainted 6.9.0-rc5-syzkaller-00031-g71b1543c83d6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: netns cleanup_net
RIP: 0010:__might_resched+0x1c/0x5e0 kernel/sched/core.c:10152
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 41 57 41 56 41 55 41 89 f5 41 54 49 89 fc <55> 89 d5 53 48 83 ec 50 48 c7 44 24 10 b3 8a b5 41 48 8d 5c 24 10
RSP: 0018:ffffc90003defa88 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 000000000007ffff RCX: 0000000000003a6b
RDX: 0000000000000000 RSI: 0000000000000114 RDI: ffffffff8c381480
RBP: dffffc0000000000 R08: 0000000000000004 R09: 000000000007ffff
R10: 0000000000003a6b R11: 0000000000000003 R12: ffffffff8c381480
R13: 0000000000000114 R14: ffffffff94a30940 R15: 0000000000003a6a
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555562f58938 CR3: 0000000054278000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000081 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
inet_twsk_purge+0xfd/0x8f0 net/ipv4/inet_timewait_sock.c:276
ops_exit_list+0x128/0x180 net/core/net_namespace.c:175
cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:637
process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
vkms_vblank_simulate: vblank timer overrun