INFO: task syz-executor.0:14444 blocked for more than 146 seconds.
Not tainted 6.10.0-rc2-next-20240607-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27360 pid:14444 tgid:14442 ppid:13626 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2557
___down_common kernel/locking/semaphore.c:225 [inline]
__down_common+0x343/0x7f0 kernel/locking/semaphore.c:246
down+0x84/0xc0 kernel/locking/semaphore.c:63
console_lock+0x145/0x1b0 kernel/printk/printk.c:2757
vt_resizex+0x414/0x900 drivers/tty/vt/vt_ioctl.c:706
vt_ioctl+0x103e/0x2090 drivers/tty/vt/vt_ioctl.c:937
tty_ioctl+0x915/0xdc0 drivers/tty/tty_io.c:2803
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efc5707cf69
RSP: 002b:00007efc57d9b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007efc571b4050 RCX: 00007efc5707cf69
RDX: 00000000200006c0 RSI: 000000000000560a RDI: 0000000000000006
RBP: 00007efc570da6fe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007efc571b4050 R15: 00007fff40a5e7b8
Showing all locks held in the system:
2 locks held by kworker/0:0/8:
1 lock held by khungtaskd/30:
#0: ffffffff8e334520 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e334520 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e334520 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6689
3 locks held by kworker/u8:12/2923:
2 locks held by getty/4860:
#0: ffff88802afe40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
1 lock held by syz-fuzzer/5106:
1 lock held by syz-fuzzer/5109:
#0: ffff88801e8ca868 (&ep->mtx){+.+.}-{3:3}, at: ep_send_events fs/eventpoll.c:1835 [inline]
#0: ffff88801e8ca868 (&ep->mtx){+.+.}-{3:3}, at: ep_poll fs/eventpoll.c:2005 [inline]
#0: ffff88801e8ca868 (&ep->mtx){+.+.}-{3:3}, at: do_epoll_wait+0x7c7/0x2040 fs/eventpoll.c:2464
3 locks held by kworker/u8:17/9899:
#0: ffff88802a81e948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
#0: ffff88802a81e948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
#1: ffffc90002e3fd00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
#1: ffffc90002e3fd00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
#2: ffffffff8f5ef548 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4733
2 locks held by kworker/u8:19/10785:
4 locks held by kworker/u8:20/10787:
5 locks held by kworker/u8:21/10789:
#0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
#0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
#1: ffffc9000e69fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
#1: ffffc9000e69fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
#2: ffffffff8f5e2d10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594
#3: ffffffff8f5ef548 (rtnl_mutex){+.+.}-{3:3}, at: cleanup_net+0x6af/0xcc0 net/core/net_namespace.c:630
#4: ffffffff8e3397c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:4480
4 locks held by kworker/1:2/11566:
6 locks held by syz-executor.4/14315:
1 lock held by syz-executor.3/14357:
2 locks held by syz-executor.3/14437:
#0: ffffffff8f5e2d10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504
#1: ffffffff8e3397c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:4480
1 lock held by syz-executor.1/14463:
2 locks held by syz-executor.4/14478:
1 lock held by syz-executor.2/14480:
2 locks held by syz-executor.1/14483:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc2-next-20240607-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
__dump_stack lib/dump_stack.c:91 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117
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:144
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: 11566 Comm: kworker/1:2 Not tainted 6.10.0-rc2-next-20240607-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: events_power_efficient gc_worker
RIP: 0010:mark_held_locks kernel/locking/lockdep.c:4307 [inline]
RIP: 0010:__trace_hardirqs_on_caller kernel/locking/lockdep.c:4345 [inline]
RIP: 0010:lockdep_hardirqs_on_prepare+0x3bb/0x780 kernel/locking/lockdep.c:4404
Code: 00 0f 94 c2 83 f2 07 48 8b 7c 24 10 48 89 de e8 2b ab 00 00 48 ba 00 00 00 00 00 fc ff df 85 c0 74 7e 49 ff c5 41 0f b6 04 17 <84> c0 75 33 49 63 06 48 83 c3 28 49 83 c4 28 49 39 c5 7c 99 eb 60
RSP: 0018:ffffc9000dd3f8e0 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffff88805aa4a908 RCX: ffffffff8172caea
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff92fc9750
RBP: ffffc9000dd3f988 R08: ffffffff92fc9757 R09: 1ffffffff25f92ea
R10: dffffc0000000000 R11: fffffbfff25f92eb R12: ffff88805aa4a928
R13: 0000000000000002 R14: ffff88805aa4a8d8 R15: 1ffff1100b54951b
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020025000 CR3: 000000006b6c6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:61
native_save_fl arch/x86/include/asm/irqflags.h:19 [inline]
arch_local_save_flags arch/x86/include/asm/irqflags.h:67 [inline]
arch_irqs_disabled arch/x86/include/asm/irqflags.h:127 [inline]
seqcount_lockdep_reader_access+0x157/0x220 include/linux/seqlock.h:74
nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:345 [inline]
gc_worker+0x316/0x1530 net/netfilter/nf_conntrack_core.c:1488
process_one_work kernel/workqueue.c:3248 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244