INFO: task syz-executor.1:21435 blocked for more than 143 seconds.
Not tainted 6.2.0-rc3-next-20230109-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D
stack:28256 pid:21435 ppid:5106 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
__down_read_common kernel/locking/rwsem.c:1260 [inline]
__down_read kernel/locking/rwsem.c:1269 [inline]
down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
handle_page_fault arch/x86/mm/fault.c:1519 [inline]
exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f72992276c6
RSP: 002b:00007ffe12016ac8 EFLAGS: 00010287
RAX: 0000001b32722000 RBX: 00007f72993ac018 RCX: 0000001b32720000
RDX: 0000001b32722004 RSI: 0000001b32721664 RDI: 00000000fed494c0
RBP: 00000000fed494c0 R08: 0000001b32b20000 R09: 00000000fed494c4
R10: 00007ffe12172090 R11: 0000000000026670 R12: 00007f72993a0000
R13: 0000000000000001 R14: 0000000000005f75 R15: ffffffff84793439
Showing all threads with locks held in the system:
task:rcu_tasks_kthre state:I stack:29056 pid:12 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
rcu_tasks_one_gp+0x484/0xcd0 kernel/rcu/tasks.h:517
rcu_tasks_kthread+0x77/0xa0 kernel/rcu/tasks.h:555
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c7929f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xcd0 kernel/rcu/tasks.h:510
task:rcu_tasks_trace state:I stack:29224 pid:13 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
rcu_tasks_one_gp+0x484/0xcd0 kernel/rcu/tasks.h:517
rcu_tasks_kthread+0x77/0xa0 kernel/rcu/tasks.h:555
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c7926f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xcd0 kernel/rcu/tasks.h:510
task:getty state:S stack:23336 pid:4756 ppid:1 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
schedule_timeout+0x1e1/0x2a0 kernel/time/timer.c:2143
wait_woken+0x197/0x200 kernel/sched/wait.c:463
n_tty_read+0x1055/0x13e0 drivers/tty/n_tty.c:2243
iterate_tty_read drivers/tty/tty_io.c:852 [inline]
tty_read+0x30e/0x5a0 drivers/tty/tty_io.c:927
call_read_iter include/linux/fs.h:2185 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x681/0x930 fs/read_write.c:470
ksys_read+0x12b/0x250 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f79fc46d8fe
RSP: 002b:00007fffc3444838 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000555d5db3b910 RCX: 00007f79fc46d8fe
RDX: 0000000000000001 RSI: 00007fffc3444850 RDI: 0000000000000000
RBP: 0000555d5db3b970 R08: 0000000000000007 R09: 0000555d5db3ccd0
R10: 0000000000000063 R11: 0000000000000246 R12: 0000555d5db3b9ac
R13: 00007fffc3444850 R14: 0000000000000000 R15: 0000555d5db3b9ac
2 locks held by getty/4756:
#0:
ffff88814b4a0098
(
&tty->ldisc_sem
){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
task:kworker/0:4 state:D
stack:25752 pid:5172 ppid:2 flags:0x00004000
Workqueue: events fqdir_free_fn
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
schedule_timeout+0x1e1/0x2a0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
rcu_barrier+0x37f/0x6d0 kernel/rcu/tree.c:4011
fqdir_free_fn+0x32/0x160 net/ipv4/inet_fragment.c:164
process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293
process_scheduled_works kernel/workqueue.c:2356 [inline]
worker_thread+0x858/0x1090 kernel/workqueue.c:2442
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
3 locks held by kworker/0:4/5172:
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x86d/0x1750 kernel/workqueue.c:2264
#1:
ffffc90004497da8
(fqdir_free_work){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1750 kernel/workqueue.c:2268
#2:
ffffffff8c79e580
(rcu_state.barrier_mutex
){+.+.}-{3:3}
, at: rcu_barrier+0x48/0x6d0 kernel/rcu/tree.c:3943
task:kworker/1:10 state:D
stack:26064 pid:8843 ppid:2 flags:0x00004000
Workqueue: rcu_gp wait_rcu_exp_gp
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
schedule_timeout+0x14e/0x2a0 kernel/time/timer.c:2167
synchronize_rcu_expedited_wait_once kernel/rcu/tree_exp.h:572 [inline]
synchronize_rcu_expedited_wait kernel/rcu/tree_exp.h:624 [inline]
rcu_exp_wait_wake+0x28f/0x11c0 kernel/rcu/tree_exp.h:693
process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293
worker_thread+0x669/0x1090 kernel/workqueue.c:2440
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
2 locks held by kworker/1:10/8843:
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}
, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
, at: set_work_data kernel/workqueue.c:636 [inline]
, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
, at: process_one_work+0x86d/0x1750 kernel/workqueue.c:2264
#1: ffffc9000bef7da8
(
(work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1750 kernel/workqueue.c:2268
task:syz-executor.1 state:D stack:28256 pid:21435 ppid:5106 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
__down_read_common kernel/locking/rwsem.c:1260 [inline]
__down_read kernel/locking/rwsem.c:1269 [inline]
down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
handle_page_fault arch/x86/mm/fault.c:1519 [inline]
exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f72992276c6
RSP: 002b:00007ffe12016ac8 EFLAGS: 00010287
RAX: 0000001b32722000 RBX: 00007f72993ac018 RCX: 0000001b32720000
RDX: 0000001b32722004 RSI: 0000001b32721664 RDI: 00000000fed494c0
RBP: 00000000fed494c0 R08: 0000001b32b20000 R09: 00000000fed494c4
R10: 00007ffe12172090 R11: 0000000000026670 R12: 00007f72993a0000
R13: 0000000000000001 R14: 0000000000005f75 R15: ffffffff84793439
1 lock held by syz-executor.1/21435:
#0: ffff888075978198 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff888075978198 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
task:syz-executor.1 state:R running task stack:26944 pid:21440 ppid:5106 flags:0x00004006
Call Trace:
5 locks held by syz-executor.1/21440:
task:kworker/u4:18 state:D stack:25240 pid:22318 ppid:2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
synchronize_rcu_expedited+0x5e2/0x770 kernel/rcu/tree_exp.h:1005
synchronize_rcu+0x302/0x3b0 kernel/rcu/tree.c:3481
synchronize_net+0x4e/0x60 net/core/dev.c:10749
nf_conntrack_cleanup_net_list+0x9e/0x5d0 net/netfilter/nf_conntrack_core.c:2555
ops_exit_list+0x125/0x170 net/core/net_namespace.c:174
cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:606
process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293
worker_thread+0x669/0x1090 kernel/workqueue.c:2440
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
4 locks held by kworker/u4:18/22318:
#0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff8880125df938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x86d/0x1750 kernel/workqueue.c:2264
#1: ffffc900159c7da8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1750 kernel/workqueue.c:2268
#2: ffffffff8e0b2490 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb10 net/core/net_namespace.c:568
#3: ffffffff8c79e6b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#3: ffffffff8c79e6b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x658/0x770 kernel/rcu/tree_exp.h:990
task:syz-executor.4 state:D stack:26120 pid:22847 ppid:5123 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6705
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747
rcu_barrier+0x48/0x6d0 kernel/rcu/tree.c:3943
setup_net+0xab5/0xe60 net/core/net_namespace.c:362
copy_net_ns+0x320/0x6b0 net/core/net_namespace.c:483
create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
copy_namespaces+0x410/0x500 kernel/nsproxy.c:179
copy_process+0x314a/0x7740 kernel/fork.c:2272
kernel_clone+0xeb/0x9a0 kernel/fork.c:2684
__do_sys_clone+0xba/0x100 kernel/fork.c:2825
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f8fc488c0c9
RSP: 002b:00007f8fc55bc118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f8fc49abf80 RCX: 00007f8fc488c0c9
RDX: 0000000020000340 RSI: 0000000020000330 RDI: 0000000050900000
RBP: 00007f8fc48e7ae9 R08: 00000000200003c0 R09: 00000000200003c0
R10: 0000000020000380 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffdb10574af R14: 00007f8fc55bc300 R15: 0000000000022000
2 locks held by syz-executor.4/22847:
#0: ffffffff8e0b2490 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2fd/0x6b0 net/core/net_namespace.c:479
#1: ffffffff8c79e580 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x6d0 kernel/rcu/tree.c:3943
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc3-next-20230109-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x32f/0x3c0 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+0xcae/0x1050 kernel/hung_task.c:377
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5211 Comm: kworker/0:6 Not tainted 6.2.0-rc3-next-20230109-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
RIP: 0010:arch_irqs_disabled_flags arch/x86/include/asm/irqflags.h:125 [inline]
RIP: 0010:check_preemption_disabled+0x4d/0x170 lib/smp_processor_id.c:19
Code: e3 ff ff ff 7f 31 ff 89 de 0f 1f 44 00 00 85 db 74 11 0f 1f 44 00 00 44 89 e0 5b 5d 41 5c 41 5d 41 5e c3 0f 1f 44 00 00 9c 5b <81> e3 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 74 d3 0f
RSP: 0018:ffffc90004507c30 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000046 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff8aa6ca20 R08: 0000000000000000 R09: ffffffff8d5e01a3
R10: fffffbfff1abc034 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff8a4c54e0 R14: 00000000ffffffff R15: ffff88801863c4e0
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560ce770c018 CR3: 000000000c48e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
lock_is_held_type+0xdb/0x140 kernel/locking/lockdep.c:5713
lock_is_held include/linux/lockdep.h:283 [inline]
__might_resched+0x1f9/0x2e0 kernel/sched/core.c:9962
wg_ratelimiter_gc_entries+0x2f5/0x430 drivers/net/wireguard/ratelimiter.c:78
process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293
worker_thread+0x669/0x1090 kernel/workqueue.c:2440
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308