IPVS: ftp: loaded support on port[0] = 21
kasan: CONFIG_KASAN_INLINE enabled
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: -1879189112 Comm: i Not tainted 4.20.0+ #3
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:191 [inline]
RIP: 0010:get_running_cputimer include/linux/sched/cputime.h:85 [inline]
RIP: 0010:account_group_system_time include/linux/sched/cputime.h:149 [inline]
RIP: 0010:account_system_index_time+0xe8/0x5f0 kernel/sched/cputime.c:168
Code: 04 00 00 49 8b 84 24 00 07 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d b8 40 01 00 00 48 8d 88 28 01 00 00 48 89 fe 48 c1 ee 03 <0f> b6 14 16 48 89 fe 83 e6 07 40 38 f2 7f 08 84 d2 0f 85 93 03 00
RSP: 0018:ffff8880ae607a80 EFLAGS: 00010006
RAX: 0000000000000000 RBX: 1ffff11015cc0f54 RCX: 0000000000000128
RDX: dffffc0000000000 RSI: 0000000000000028 RDI: 0000000000000140
RBP: ffff8880ae607b48 R08: ffff8880ae61f5f0 R09: ffffffff8a99f01d
R10: ffffffff8a99f010 R11: 0000000000000001 R12: ffff8880a9e62240
R13: 000000000097b7ef R14: 0000000000000003 R15: ffff8880ae607b20
FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000068 CR3: 000000009505e000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
irqtime_account_process_tick.isra.0+0x3a2/0x490 kernel/sched/cputime.c:380
account_process_tick+0x27f/0x350 kernel/sched/cputime.c:483
update_process_times+0x25/0x80 kernel/time/timer.c:1633
tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161
tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271
__run_hrtimer kernel/time/hrtimer.c:1389 [inline]
__hrtimer_run_queues+0x3a7/0x1050 kernel/time/hrtimer.c:1451
hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline]
smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
Modules linked in:
======================================================
WARNING: possible circular locking dependency detected
4.20.0+ #3 Not tainted
------------------------------------------------------
syz-executor1/10259 is trying to acquire lock:
00000000498c8856 ((console_sem).lock){-.-.}, at: down_trylock+0x13/0x70 kernel/locking/semaphore.c:136
but task is already holding lock:
000000004b425f60 (hrtimer_bases.lock){-.-.}, at: __run_hrtimer kernel/time/hrtimer.c:1391 [inline]
000000004b425f60 (hrtimer_bases.lock){-.-.}, at: __hrtimer_run_queues+0x40f/0x1050 kernel/time/hrtimer.c:1451
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (hrtimer_bases.lock){-.-.}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152
lock_hrtimer_base.isra.0+0x75/0x130 kernel/time/hrtimer.c:165
hrtimer_start_range_ns+0x120/0xda0 kernel/time/hrtimer.c:1104
hrtimer_start_expires include/linux/hrtimer.h:409 [inline]
start_rt_bandwidth kernel/sched/rt.c:70 [inline]
inc_rt_group kernel/sched/rt.c:1147 [inline]
inc_rt_tasks kernel/sched/rt.c:1191 [inline]
__enqueue_rt_entity kernel/sched/rt.c:1261 [inline]
enqueue_rt_entity kernel/sched/rt.c:1305 [inline]
enqueue_task_rt+0x95b/0x1010 kernel/sched/rt.c:1335
enqueue_task+0xb9/0x380 kernel/sched/core.c:730
__sched_setscheduler+0xe32/0x1fe0 kernel/sched/core.c:4336
_sched_setscheduler+0x218/0x340 kernel/sched/core.c:4373
sched_setscheduler+0xe/0x10 kernel/sched/core.c:4388
watchdog_dev_init+0x109/0x1db drivers/watchdog/watchdog_dev.c:1144
watchdog_init+0x81/0x294 drivers/watchdog/watchdog_core.c:355
do_one_initcall+0x129/0x937 init/main.c:889
do_initcall_level init/main.c:957 [inline]
do_initcalls init/main.c:965 [inline]
do_basic_setup init/main.c:983 [inline]
kernel_init_freeable+0x4db/0x5cf init/main.c:1147
kernel_init+0x12/0x1c5 init/main.c:1067
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
-> #3 (&rt_b->rt_runtime_lock){-...}:
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144
__enable_runtime kernel/sched/rt.c:786 [inline]
rq_online_rt+0xb4/0x390 kernel/sched/rt.c:2178
set_rq_online.part.0+0xe7/0x140 kernel/sched/core.c:5666
set_rq_online kernel/sched/core.c:5772 [inline]
sched_cpu_activate+0x29e/0x430 kernel/sched/core.c:5765
cpuhp_invoke_callback+0x2f6/0x2110 kernel/cpu.c:168
cpuhp_thread_fun+0x496/0x8a0 kernel/cpu.c:685
smpboot_thread_fn+0x6ab/0xa10 kernel/smpboot.c:164
kthread+0x357/0x430 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
-> #2 (&rq->lock){-.-.}:
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144
rq_lock kernel/sched/sched.h:1149 [inline]
task_fork_fair+0xb5/0x7a0 kernel/sched/fair.c:10083
sched_fork+0x437/0xb90 kernel/sched/core.c:2359
copy_process+0x1ff6/0x8730 kernel/fork.c:1892
_do_fork+0x1a9/0x1170 kernel/fork.c:2221
kernel_thread+0x34/0x40 kernel/fork.c:2280
rest_init+0x28/0x37b init/main.c:409
arch_call_rest_init+0xe/0x1b
start_kernel+0x882/0x8bd init/main.c:741
x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470
x86_64_start_kernel+0x77/0x7b arch/x86/kernel/head64.c:451
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243
-> #1 (&p->pi_lock){-.-.}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152
try_to_wake_up+0xb9/0x1480 kernel/sched/core.c:1965
wake_up_process+0x10/0x20 kernel/sched/core.c:2129
__up.isra.0+0x1c0/0x2a0 kernel/locking/semaphore.c:262
up+0x13e/0x1c0 kernel/locking/semaphore.c:187
__up_console_sem+0xb7/0x1c0 kernel/printk/printk.c:236
console_unlock+0x778/0x11e0 kernel/printk/printk.c:2426
vprintk_emit+0x370/0x960 kernel/printk/printk.c:1931
vprintk_default+0x28/0x30 kernel/printk/printk.c:1958
vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398
printk+0xba/0xed kernel/printk/printk.c:1991
kauditd_printk_skb kernel/audit.c:545 [inline]
kauditd_hold_skb.cold+0x3f/0x4e kernel/audit.c:578
kauditd_send_queue+0x133/0x170 kernel/audit.c:741
kauditd_thread+0x808/0xb80 kernel/audit.c:867
kthread+0x357/0x430 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
-> #0 ((console_sem).lock){-.-.}:
lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152
down_trylock+0x13/0x70 kernel/locking/semaphore.c:136
__down_trylock_console_sem+0xa8/0x210 kernel/printk/printk.c:219
console_trylock+0x15/0xa0 kernel/printk/printk.c:2242
console_trylock_spinning kernel/printk/printk.c:1662 [inline]
vprintk_emit+0x351/0x960 kernel/printk/printk.c:1930
vprintk_default+0x28/0x30 kernel/printk/printk.c:1958
vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398
printk+0xba/0xed kernel/printk/printk.c:1991
kasan_die_handler arch/x86/mm/kasan_init_64.c:250 [inline]
kasan_die_handler.cold+0x11/0x23 arch/x86/mm/kasan_init_64.c:245
notifier_call_chain+0x179/0x380 kernel/notifier.c:93
__atomic_notifier_call_chain kernel/notifier.c:183 [inline]
atomic_notifier_call_chain+0x96/0x190 kernel/notifier.c:193
notify_die+0x1b2/0x270 kernel/notifier.c:549
do_general_protection+0x13d/0x300 arch/x86/kernel/traps.c:557
general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1142
timerqueue_add+0xf2/0x320 lib/timerqueue.c:52
enqueue_hrtimer+0x1ae/0x570 kernel/time/hrtimer.c:951
__run_hrtimer kernel/time/hrtimer.c:1404 [inline]
__hrtimer_run_queues+0xc39/0x1050 kernel/time/hrtimer.c:1451
hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline]
smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline]
lock_release+0x546/0xc40 kernel/locking/lockdep.c:3863
rcu_lock_release include/linux/rcupdate.h:228 [inline]
rcu_read_unlock include/linux/rcupdate.h:661 [inline]
inet_twsk_purge+0x5ec/0x870 net/ipv4/inet_timewait_sock.c:298
dccp_v4_exit_batch+0x1a/0x20 net/dccp/ipv4.c:1033
ops_exit_list.isra.0+0x105/0x160 net/core/net_namespace.c:156
setup_net+0x4b2/0x8c0 net/core/net_namespace.c:331
copy_net_ns+0x2ae/0x4b0 net/core/net_namespace.c:437
create_new_namespaces+0x4ce/0x930 kernel/nsproxy.c:107
unshare_nsproxy_namespaces+0xc2/0x200 kernel/nsproxy.c:206
ksys_unshare+0x6d7/0xfb0 kernel/fork.c:2544
__do_sys_unshare kernel/fork.c:2612 [inline]
__se_sys_unshare kernel/fork.c:2610 [inline]
__x64_sys_unshare+0x31/0x40 kernel/fork.c:2610
do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
other info that might help us debug this:
Chain exists of:
(console_sem).lock --> &rt_b->rt_runtime_lock --> hrtimer_bases.lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(hrtimer_bases.lock);
lock(&rt_b->rt_runtime_lock);
lock(hrtimer_bases.lock);
lock((console_sem).lock);
*** DEADLOCK ***
3 locks held by syz-executor1/10259:
#0: 000000000d50ad16 (pernet_ops_rwsem){++++}, at: copy_net_ns+0x289/0x4b0 net/core/net_namespace.c:433
#1: 000000004b425f60 (hrtimer_bases.lock){-.-.}, at: __run_hrtimer kernel/time/hrtimer.c:1391 [inline]
#1: 000000004b425f60 (hrtimer_bases.lock){-.-.}, at: __hrtimer_run_queues+0x40f/0x1050 kernel/time/hrtimer.c:1451
#2: 00000000ffcf23ce (rcu_read_lock){....}, at: atomic_notifier_call_chain+0x0/0x190 kernel/notifier.c:329
stack backtrace:
CPU: 1 PID: 10259 Comm: syz-executor1 Not tainted 4.20.0+ #3
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1224
check_prev_add kernel/locking/lockdep.c:1866 [inline]
check_prevs_add kernel/locking/lockdep.c:1979 [inline]
validate_chain kernel/locking/lockdep.c:2350 [inline]
__lock_acquire+0x3014/0x4a30 kernel/locking/lockdep.c:3338
lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152
down_trylock+0x13/0x70 kernel/locking/semaphore.c:136
__down_trylock_console_sem+0xa8/0x210 kernel/printk/printk.c:219
console_trylock+0x15/0xa0 kernel/printk/printk.c:2242
console_trylock_spinning kernel/printk/printk.c:1662 [inline]
vprintk_emit+0x351/0x960 kernel/printk/printk.c:1930
vprintk_default+0x28/0x30 kernel/printk/printk.c:1958
vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398
printk+0xba/0xed kernel/printk/printk.c:1991
kasan_die_handler arch/x86/mm/kasan_init_64.c:250 [inline]
kasan_die_handler.cold+0x11/0x23 arch/x86/mm/kasan_init_64.c:245
notifier_call_chain+0x179/0x380 kernel/notifier.c:93
__atomic_notifier_call_chain kernel/notifier.c:183 [inline]
atomic_notifier_call_chain+0x96/0x190 kernel/notifier.c:193
notify_die+0x1b2/0x270 kernel/notifier.c:549
do_general_protection+0x13d/0x300 arch/x86/kernel/traps.c:557
general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1142
RIP: 0010:timerqueue_add+0xf2/0x320 lib/timerqueue.c:52
Code: 48 c1 ea 03 42 80 3c 2a 00 0f 85 bc 01 00 00 49 8b 17 48 85 d2 74 3d 48 89 d3 e8 49 cc 8f f9 48 8d 7b 18 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 a3 01 00 00 4c 8b 7b 18 4c 89 f7 4c 89 fe e8
RSP: 0018:ffff8880ae707b68 EFLAGS: 00010007
RAX: 0000000000001022 RBX: 00000000000080fe RCX: ffffffff87f1d9ec
RDX: 0000000000010000 RSI: ffffffff87f1d9c7 RDI: 0000000000008116
RBP: ffff8880ae707b98 R08: ffff88806b366700 R09: ffffed1015ce5b90
R10: ffffed1015ce5b8f R11: ffff8880ae72dc7b R12: ffff8880ae726620
R13: dffffc0000000000 R14: 0000002f3acf47be R15: ffff8880872cdb10
enqueue_hrtimer+0x1ae/0x570 kernel/time/hrtimer.c:951
__run_hrtimer kernel/time/hrtimer.c:1404 [inline]
__hrtimer_run_queues+0xc39/0x1050 kernel/time/hrtimer.c:1451
hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline]
smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline]
RIP: 0010:lock_release+0x546/0xc40 kernel/locking/lockdep.c:3863
Code: 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 0b 04 00 00 48 83 3d 89 2a 2e 08 00 0f 84 4d 02 00 00 48 8b bd
Lost 62 message(s)!
---[ end trace 98f7b6fc65bb635a ]---
general protection fault: 0000 [#2] PREEMPT SMP KASAN
CPU: 1 PID: 10259 Comm: syz-executor1 Tainted: G D 4.20.0+ #3
RIP: 0010:__read_once_size include/linux/compiler.h:191 [inline]
RIP: 0010:get_running_cputimer include/linux/sched/cputime.h:85 [inline]
RIP: 0010:account_group_system_time include/linux/sched/cputime.h:149 [inline]
RIP: 0010:account_system_index_time+0xe8/0x5f0 kernel/sched/cputime.c:168
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Code: 04 00 00 49 8b 84 24 00 07 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d b8 40 01 00 00 48 8d 88 28 01 00 00 48 89 fe 48 c1 ee 03 <0f> b6 14 16 48 89 fe 83 e6 07 40 38 f2 7f 08 84 d2 0f 85 93 03 00
RIP: 0010:timerqueue_add+0xf2/0x320 lib/timerqueue.c:52
RSP: 0018:ffff8880ae607a80 EFLAGS: 00010006
Code: 48 c1 ea 03 42 80 3c 2a 00 0f 85 bc 01 00 00 49 8b 17 48 85 d2 74 3d 48 89 d3 e8 49 cc 8f f9 48 8d 7b 18 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 a3 01 00 00 4c 8b 7b 18 4c 89 f7 4c 89 fe e8
RAX: 0000000000000000 RBX: 1ffff11015cc0f54 RCX: 0000000000000128
RSP: 0018:ffff8880ae707b68 EFLAGS: 00010007
RDX: dffffc0000000000 RSI: 0000000000000028 RDI: 0000000000000140
RAX: 0000000000001022 RBX: 00000000000080fe RCX: ffffffff87f1d9ec
RBP: ffff8880ae607b48 R08: ffff8880ae61f5f0 R09: ffffffff8a99f01d
RDX: 0000000000010000 RSI: ffffffff87f1d9c7 RDI: 0000000000008116
R10: ffffffff8a99f010 R11: 0000000000000001 R12: ffff8880a9e62240
RBP: ffff8880ae707b98 R08: ffff88806b366700 R09: ffffed1015ce5b90
R13: 000000000097b7ef R14: 0000000000000003 R15: ffff8880ae607b20
R10: ffffed1015ce5b8f R11: ffff8880ae72dc7b R12: ffff8880ae726620
FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
R13: dffffc0000000000 R14: 0000002f3acf47be R15: ffff8880872cdb10
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000068 CR3: 000000009505e000 CR4: 00000000001406f0
FS: 00007f9b4a331700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
CR2: 00007f8d69b1b000 CR3: 0000000093d4b000 CR4: 00000000001406e0