netlink: 28 bytes leftover after parsing attributes in process `syz-executor5'.
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 23437 Comm: syz-executor1 Not tainted 4.19.0-rc4-next-20180921+ #77
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__fire_sched_out_preempt_notifiers kernel/sched/core.c:2502 [inline]
RIP: 0010:fire_sched_out_preempt_notifiers kernel/sched/core.c:2510 [inline]
RIP: 0010:prepare_task_switch kernel/sched/core.c:2616 [inline]
RIP: 0010:context_switch kernel/sched/core.c:2795 [inline]
RIP: 0010:__schedule+0x1144/0x1ed0 kernel/sched/core.c:3479
Code: 89 e0 48 c1 e8 03 42 80 3c 28 00 0f 85 7e 08 00 00 4d 8b 24 24 4d 85 e4 0f 84 7e f5 ff ff 49 8d 7c 24 10 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 a4 e8 e0 bb 00 fa eb 9d 48 8d bb 28 04 00 00 48
RSP: 0018:ffff88018b3a7118 EFLAGS: 00010806
RAX: 1bd5a00000000022 RBX: ffff880197dde040 RCX: 1ffff10031ae697f
RDX: 0000000040000002 RSI: 0000000000000000 RDI: dead000000000110
RBP: ffff88018b3a72f0 R08: ffff8801bef7e280 R09: fffff5200203da47
R10: fffff5200203da47 R11: ffffc900101ed23b R12: dead000000000100
R13: dffffc0000000000 R14: ffff8801dac2cc40 R15: ffff8801bef7e280
FS: 00007f640003e700(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7ea962a000 CR3: 0000000193496000 CR4: 00000000001426f0
Call Trace:
preempt_schedule_irq+0x87/0x110 kernel/sched/core.c:3706
retint_kernel+0x1b/0x2d
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline]
RIP: 0010:text_poke+0x43b/0x5e0 arch/x86/kernel/alternative.c:727
Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 80 01 00 00 48 83 3d 11 1b 46 08 00 0f 84 d7 00 00 00 48 8b 7d d0 57 9d <0f> 1f 44 00 00 48 83 c4 18 4c 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d
RSP: 0018:ffff88018b3a73e0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 1ffff10037defd6e
RDX: 1ffffffff12e44be RSI: 0000000000000000 RDI: 0000000000000282
RBP: ffff88018b3a7420 R08: ffff8801bef7eb70 R09: 0000000000000006
R10: 0000000000000000 R11: ffff8801bef7e280 R12: ffffffff81198963
R13: ffffea0000046640 R14: ffff88018b3a7510 R15: 0000000000000001
text_poke_bp+0x13b/0x1de arch/x86/kernel/alternative.c:820
__jump_label_transform.isra.0+0x478/0x8f0 arch/x86/kernel/jump_label.c:105
arch_jump_label_transform+0x2f/0x40 arch/x86/kernel/jump_label.c:113
__jump_label_update+0x16e/0x1a0 kernel/jump_label.c:380
jump_label_update+0x174/0x320 kernel/jump_label.c:765
__static_key_slow_dec_cpuslocked+0xbd/0x210 kernel/jump_label.c:210
__static_key_slow_dec kernel/jump_label.c:220 [inline]
static_key_slow_dec+0x63/0xa0 kernel/jump_label.c:234
kvm_arch_vcpu_uninit+0x189/0x1c0 arch/x86/kvm/x86.c:8822
kvm_vcpu_uninit+0x44/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:337
vmx_free_vcpu+0x23a/0x300 arch/x86/kvm/vmx.c:10947
kvm_arch_vcpu_free arch/x86/kvm/x86.c:8438 [inline]
kvm_free_vcpus arch/x86/kvm/x86.c:8888 [inline]
kvm_arch_destroy_vm+0x365/0x7c0 arch/x86/kvm/x86.c:8985
kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:751 [inline]
kvm_put_kvm+0x6c8/0xff0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:772
kvm_vcpu_release+0x7b/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2406
__fput+0x3bc/0xa70 fs/file_table.c:279
____fput+0x15/0x20 fs/file_table.c:312
task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:193 [inline]
exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457679
Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f640003dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffea RBX: 00007f640003e6d4 RCX: 0000000000457679
RDX: 0000000020000040 RSI: 000000004080aebf RDI: 0000000000000005
RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004cfca0 R14: 00000000004bfdd6 R15: 0000000000000001
Modules linked in:
======================================================
WARNING: possible circular locking dependency detected
4.19.0-rc4-next-20180921+ #77 Not tainted
------------------------------------------------------
syz-executor1/23437 is trying to acquire lock:
00000000239e3c80 ((console_sem).lock){-.-.}, at: down_trylock+0x13/0x70 kernel/locking/semaphore.c:136
but task is already holding lock:
00000000a646c16e (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1125 [inline]
00000000a646c16e (&rq->lock){-.-.}, at: __schedule+0x236/0x1ed0 kernel/sched/core.c:3417
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&rq->lock){-.-.}:
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144
rq_lock kernel/sched/sched.h:1125 [inline]
task_fork_fair+0xb0/0x6d0 kernel/sched/fair.c:9674
sched_fork+0x443/0xba0 kernel/sched/core.c:2358
copy_process+0x2585/0x8780 kernel/fork.c:1887
_do_fork+0x1cb/0x11c0 kernel/fork.c:2216
kernel_thread+0x34/0x40 kernel/fork.c:2275
rest_init+0x22/0xe5 init/main.c:408
start_kernel+0x8bc/0x8f7 init/main.c:739
x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:452
x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:433
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242
-> #1 (&p->pi_lock){-.-.}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152
try_to_wake_up+0xd2/0x12f0 kernel/sched/core.c:1964
wake_up_process+0x10/0x20 kernel/sched/core.c:2128
__up.isra.1+0x1c0/0x2a0 kernel/locking/semaphore.c:262
up+0x13c/0x1c0 kernel/locking/semaphore.c:187
__up_console_sem+0xbe/0x1b0 kernel/printk/printk.c:243
console_unlock+0x80c/0x1150 kernel/printk/printk.c:2426
vprintk_emit+0x33d/0x930 kernel/printk/printk.c:1921
vprintk_default+0x28/0x30 kernel/printk/printk.c:1962
vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398
printk+0xa7/0xcf kernel/printk/printk.c:1995
load_umh+0x51/0xbd net/bpfilter/bpfilter_kern.c:98
do_one_initcall+0x140/0x956 init/main.c:885
do_initcall_level init/main.c:953 [inline]
do_initcalls init/main.c:961 [inline]
do_basic_setup init/main.c:979 [inline]
kernel_init_freeable+0x4bb/0x5ae init/main.c:1144
kernel_init+0x11/0x1b2 init/main.c:1063
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
-> #0 ((console_sem).lock){-.-.}:
lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3900
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152
down_trylock+0x13/0x70 kernel/locking/semaphore.c:136
__down_trylock_console_sem+0xae/0x200 kernel/printk/printk.c:226
console_trylock+0x15/0xa0 kernel/printk/printk.c:2244
console_trylock_spinning kernel/printk/printk.c:1648 [inline]
vprintk_emit+0x322/0x930 kernel/printk/printk.c:1920
vprintk_default+0x28/0x30 kernel/printk/printk.c:1962
vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398
printk+0xa7/0xcf kernel/printk/printk.c:1995
kasan_die_handler.cold.22+0x11/0x30 arch/x86/mm/kasan_init_64.c:250
notifier_call_chain+0x17e/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+0x1bd/0x2d0 kernel/notifier.c:549
do_general_protection+0x25b/0x340 arch/x86/kernel/traps.c:573
general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1138
__fire_sched_out_preempt_notifiers kernel/sched/core.c:2502 [inline]
fire_sched_out_preempt_notifiers kernel/sched/core.c:2510 [inline]
prepare_task_switch kernel/sched/core.c:2616 [inline]
context_switch kernel/sched/core.c:2795 [inline]
__schedule+0x1144/0x1ed0 kernel/sched/core.c:3479
preempt_schedule_irq+0x87/0x110 kernel/sched/core.c:3706
retint_kernel+0x1b/0x2d
arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline]
text_poke+0x43b/0x5e0 arch/x86/kernel/alternative.c:727
text_poke_bp+0x13b/0x1de arch/x86/kernel/alternative.c:820
__jump_label_transform.isra.0+0x478/0x8f0 arch/x86/kernel/jump_label.c:105
arch_jump_label_transform+0x2f/0x40 arch/x86/kernel/jump_label.c:113
__jump_label_update+0x16e/0x1a0 kernel/jump_label.c:380
jump_label_update+0x174/0x320 kernel/jump_label.c:765
__static_key_slow_dec_cpuslocked+0xbd/0x210 kernel/jump_label.c:210
__static_key_slow_dec kernel/jump_label.c:220 [inline]
static_key_slow_dec+0x63/0xa0 kernel/jump_label.c:234
kvm_arch_vcpu_uninit+0x189/0x1c0 arch/x86/kvm/x86.c:8822
kvm_vcpu_uninit+0x44/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:337
vmx_free_vcpu+0x23a/0x300 arch/x86/kvm/vmx.c:10947
kvm_arch_vcpu_free arch/x86/kvm/x86.c:8438 [inline]
kvm_free_vcpus arch/x86/kvm/x86.c:8888 [inline]
kvm_arch_destroy_vm+0x365/0x7c0 arch/x86/kvm/x86.c:8985
kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:751 [inline]
kvm_put_kvm+0x6c8/0xff0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:772
kvm_vcpu_release+0x7b/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2406
__fput+0x3bc/0xa70 fs/file_table.c:279
____fput+0x15/0x20 fs/file_table.c:312
task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:193 [inline]
exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
other info that might help us debug this:
Chain exists of:
(console_sem).lock --> &p->pi_lock --> &rq->lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rq->lock);
lock(&p->pi_lock);
lock(&rq->lock);
lock((console_sem).lock);
*** DEADLOCK ***
5 locks held by syz-executor1/23437:
#0: 00000000e04deea6 (cpu_hotplug_lock.rw_sem){++++}, at: __static_key_slow_dec kernel/jump_label.c:219 [inline]
#0: 00000000e04deea6 (cpu_hotplug_lock.rw_sem){++++}, at: static_key_slow_dec+0x57/0xa0 kernel/jump_label.c:234
#1: 00000000e0c7541b (jump_label_mutex){+.+.}, at: __static_key_slow_dec_cpuslocked+0x87/0x210 kernel/jump_label.c:200
#2: 00000000ac3ce05a (text_mutex){+.+.}, at: arch_jump_label_transform+0x1b/0x40 arch/x86/kernel/jump_label.c:112
#3: 00000000a646c16e (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1125 [inline]
#3: 00000000a646c16e (&rq->lock){-.-.}, at: __schedule+0x236/0x1ed0 kernel/sched/core.c:3417
#4: 000000009bcf596b (rcu_read_lock){....}, at: atomic_notifier_call_chain+0x0/0x190 kernel/notifier.c:329
stack backtrace:
CPU: 0 PID: 23437 Comm: syz-executor1 Not tainted 4.19.0-rc4-next-20180921+ #77
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+0x1d3/0x2c4 lib/dump_stack.c:113
print_circular_bug.isra.33.cold.54+0x1bd/0x27d kernel/locking/lockdep.c:1221
check_prev_add kernel/locking/lockdep.c:1861 [inline]
check_prevs_add kernel/locking/lockdep.c:1974 [inline]
validate_chain kernel/locking/lockdep.c:2415 [inline]
__lock_acquire+0x33e4/0x4ec0 kernel/locking/lockdep.c:3411
lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3900
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152
down_trylock+0x13/0x70 kernel/locking/semaphore.c:136
__down_trylock_console_sem+0xae/0x200 kernel/printk/printk.c:226
console_trylock+0x15/0xa0 kernel/printk/printk.c:2244
console_trylock_spinning kernel/printk/printk.c:1648 [inline]
vprintk_emit+0x322/0x930 kernel/printk/printk.c:1920
vprintk_default+0x28/0x30 kernel/printk/printk.c:1962
vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398
printk+0xa7/0xcf kernel/printk/printk.c:1995
kasan_die_handler.cold.22+0x11/0x30 arch/x86/mm/kasan_init_64.c:250
notifier_call_chain+0x17e/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+0x1bd/0x2d0 kernel/notifier.c:549
do_general_protection+0x25b/0x340 arch/x86/kernel/traps.c:573
general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1138
RIP: 0010:__fire_sched_out_preempt_notifiers kernel/sched/core.c:2502 [inline]
RIP: 0010:fire_sched_out_preempt_notifiers kernel/sched/core.c:2510 [inline]
RIP: 0010:prepare_task_switch kernel/sched/core.c:2616 [inline]
RIP: 0010:context_switch kernel/sched/core.c:2795 [inline]
RIP: 0010:__schedule+0x1144/0x1ed0 kernel/sched/core.c:3479
Code: 89 e0 48 c1 e8 03 42 80 3c 28 00 0f 85 7e 08 00 00 4d 8b 24 24 4d 85 e4 0f 84 7e f5 ff ff 49 8d 7c 24 10 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 a4 e8 e0 bb 00 fa eb 9d 48 8d bb 28 04 00 00 48
RSP: 0018:ffff88018b3a7118 EFLAGS: 00010806
RAX: 1bd5a00000000022 RBX: ffff880197dde040 RCX: 1ffff10031ae697f
RDX: 0000000040000002 RSI: 0000000000000000 RDI: dead000000000110
RBP: ffff88018b3a72f0 R08: ffff8801bef7e280 R09: fffff5200203da47
R10: fffff5200203da47 R11: ffffc900101ed23b R12: dead000000000100
R13: dffffc0000000000 R14: ffff8801dac2cc40 R15: ffff8801bef7e280
preempt_schedule_irq+0x87/0x110 kernel/sched/core.c:3706
retint_kernel+0x1b/0x2d
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline]
RIP: 0010:text_poke+0x43b/0x5e0 arch/x86/kernel/alternative.c:727
Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 80 01 00 00 48 83 3d 11 1b 46 08 00 0f 84 d7 00 00 00 48 8b 7d d0 57 9d <0f> 1f 44 00 00 48 83 c4 18 4c 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d
RSP: 0018:ffff88018b3a73e0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 1ffff10037defd6e
RDX: 1ffffffff12e44be RSI: 0000000000000000 RDI: 0000000000000282
RBP: ffff88018b3a7420 R08: ffff8801bef7eb70 R09: 0000000000000006
R10: 0000000000000000 R11: ffff8801bef7e280 R12: ffffffff81198963
R13: ffffea0000046640 R14: ffff88018b3a7510 R15: 0000000000000001
text_poke_bp+0x13b/0x1de arch/x86/kernel/alternative.c:820
__jump_l
Lost 70 message(s)!
---[ end trace 9a42f23386591658 ]---
RIP: 0010:__fire_sched_out_preempt_notifiers kernel/sched/core.c:2502 [inline]
RIP: 0010:fire_sched_out_preempt_notifiers kernel/sched/core.c:2510 [inline]
RIP: 0010:prepare_task_switch kernel/sched/core.c:2616 [inline]
RIP: 0010:context_switch kernel/sched/core.c:2795 [inline]
RIP: 0010:__schedule+0x1144/0x1ed0 kernel/sched/core.c:3479
Code: 89 e0 48 c1 e8 03 42 80 3c 28 00 0f 85 7e 08 00 00 4d 8b 24 24 4d 85 e4 0f 84 7e f5 ff ff 49 8d 7c 24 10 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 a4 e8 e0 bb 00 fa eb 9d 48 8d bb 28 04 00 00 48
RSP: 0018:ffff88018b3a7118 EFLAGS: 00010806
RAX: 1bd5a00000000022 RBX: ffff880197dde040 RCX: 1ffff10031ae697f
RDX: 0000000040000002 RSI: 0000000000000000 RDI: dead000000000110
RBP: ffff88018b3a72f0 R08: ffff8801bef7e280 R09: fffff5200203da47
R10: fffff5200203da47 R11: ffffc900101ed23b R12: dead000000000100
R13: dffffc0000000000 R14: ffff8801dac2cc40 R15: ffff8801bef7e280
FS: 00007f640003e700(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7ea962a000 CR3: 0000000193496000 CR4: 00000000001426f0