================================
WARNING: inconsistent lock state
5.5.0-rc6-next-20200116-syzkaller #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
syz-executor385/11111 [HC0[0]:SC1[1]:HE1:SE0] takes:
ffffffff8a03ce58 (ima_keys_lock){+.?.}, at: spin_lock include/linux/spinlock.h:338 [inline]
ffffffff8a03ce58 (ima_keys_lock){+.?.}, at: ima_process_queued_keys+0x4f/0x320 security/integrity/ima/ima_asymmetric_keys.c:144
{SOFTIRQ-ON-W} state was registered at:
lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4484
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:338 [inline]
ima_queue_key security/integrity/ima/ima_asymmetric_keys.c:111 [inline]
ima_post_key_create_or_update+0x234/0x470 security/integrity/ima/ima_asymmetric_keys.c:194
key_create_or_update+0x6b8/0xcb0 security/keys/key.c:944
load_system_certificate_list+0x1ba/0x25e certs/system_keyring.c:161
do_one_initcall+0x120/0x820 init/main.c:1109
do_initcall_level init/main.c:1182 [inline]
do_initcalls init/main.c:1198 [inline]
do_basic_setup init/main.c:1218 [inline]
kernel_init_freeable+0x522/0x5d0 init/main.c:1402
kernel_init+0x12/0x1bf init/main.c:1309
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
irq event stamp: 654
hardirqs last enabled at (654): [<ffffffff87ee0813>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
hardirqs last enabled at (654): [<ffffffff87ee0813>] _raw_spin_unlock_irq+0x23/0x80 kernel/locking/spinlock.c:199
hardirqs last disabled at (653): [<ffffffff87ee09fa>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline]
hardirqs last disabled at (653): [<ffffffff87ee09fa>] _raw_spin_lock_irq+0x3a/0x80 kernel/locking/spinlock.c:167
softirqs last enabled at (0): [<ffffffff814553d2>] copy_process+0x1ad2/0x7290 kernel/fork.c:2027
softirqs last disabled at (173): [<ffffffff8147a05b>] invoke_softirq kernel/softirq.c:373 [inline]
softirqs last disabled at (173): [<ffffffff8147a05b>] irq_exit+0x19b/0x1e0 kernel/softirq.c:413
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(ima_keys_lock);
<Interrupt>
lock(ima_keys_lock);
*** DEADLOCK ***
2 locks held by syz-executor385/11111:
#0: ffffffff89bb0400 (rcu_read_lock){....}, at: get_pid_task+0x0/0x210 include/linux/refcount.h:193
#1: ffffc90000007d50 ((&ima_key_queue_timer)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:172 [inline]
#1: ffffc90000007d50 ((&ima_key_queue_timer)){+.-.}, at: call_timer_fn+0xe0/0x780 kernel/time/timer.c:1394
stack backtrace:
CPU: 0 PID: 11111 Comm: syz-executor385 Not tainted 5.5.0-rc6-next-20200116-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x197/0x210 lib/dump_stack.c:118
print_usage_bug.cold+0x327/0x378 kernel/locking/lockdep.c:3100
valid_state kernel/locking/lockdep.c:3111 [inline]
mark_lock_irq kernel/locking/lockdep.c:3308 [inline]
mark_lock+0xbb4/0x1220 kernel/locking/lockdep.c:3665
mark_usage kernel/locking/lockdep.c:3565 [inline]
__lock_acquire+0x1e8e/0x4a00 kernel/locking/lockdep.c:3908
lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4484
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:338 [inline]
ima_process_queued_keys+0x4f/0x320 security/integrity/ima/ima_asymmetric_keys.c:144
ima_timer_handler+0x15/0x20 security/integrity/ima/ima_asymmetric_keys.c:46
call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404
expire_timers kernel/time/timer.c:1449 [inline]
__run_timers kernel/time/timer.c:1773 [inline]
__run_timers kernel/time/timer.c:1740 [inline]
run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786
__do_softirq+0x262/0x98c kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x19b/0x1e0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:536 [inline]
smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
</IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline]
RIP: 0010:lock_acquire+0x20b/0x410 kernel/locking/lockdep.c:4487
Code: 9c 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 d3 01 00 00 48 83 3d 49 7d 58 08 00 0f 84 53 01 00 00 48 8b 7d c8 57 9d <0f> 1f 44 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 65 8b
RSP: 0018:ffffc90009327838 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff136774f RBX: ffff88808da9a3c0 RCX: ffffffff815ae240
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: 0000000000000286
RBP: ffffc90009327880 R08: 1ffffffff16a51a4 R09: fffffbfff16a51a5
R10: ffff88808da9ac60 R11: ffff88808da9a3c0 R12: ffffffff89bb0400
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002
rcu_lock_acquire include/linux/rcupdate.h:208 [inline]
rcu_read_lock include/linux/rcupdate.h:601 [inline]
get_pid_task+0x3e/0x210 kernel/pid.c:426
get_proc_task fs/proc/internal.h:124 [inline]
proc_pid_permission+0x92/0x2f0 fs/proc/base.c:717
do_inode_permission fs/namei.c:384 [inline]
inode_permission+0x36b/0x520 fs/namei.c:449
may_lookup fs/namei.c:1787 [inline]
link_path_walk.part.0+0xa28/0x1370 fs/namei.c:2183
link_path_walk fs/namei.c:2171 [inline]
path_openat+0x1f9/0x34d0 fs/namei.c:3603
do_filp_open+0x192/0x260 fs/namei.c:3634
do_sys_openat2+0x633/0x840 fs/open.c:1151
do_sys_open+0xfc/0x190 fs/open.c:1167
ksys_open include/linux/syscalls.h:1387 [inline]
__do_sys_open fs/open.c:1173 [inline]
__se_sys_open fs/open.c:1171 [inline]
__x64_sys_open+0x7e/0xc0 fs/open.c:1171
do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x400fc0
Code: 01 f0 ff ff 0f 83 c0 0b 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 0d 17 2d 00 00 75 14 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 94 0b 00 00 c3 48 83 ec 08 e8 fa 00 00 00
RSP: 002b:00007ffc4b90b3c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007ffc4b90b3f4 RCX: 0000000000400fc0
RDX: 00007ffc4b90b3fa RSI: 0000000000080001 RDI: 00000000004a21e2
RBP: 00007ffc4b90b3f0 R08: 0000000000000000 R09: 0000000000000004
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401fe0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000