================================
WARNING: inconsistent lock state
5.5.0-rc6-next-20200116-syzkaller #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
syz-fuzzer/9579 [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: 4299900
hardirqs last  enabled at (4299900): [<ffffffff87ee0813>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
hardirqs last  enabled at (4299900): [<ffffffff87ee0813>] _raw_spin_unlock_irq+0x23/0x80 kernel/locking/spinlock.c:199
hardirqs last disabled at (4299899): [<ffffffff87ee09fa>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline]
hardirqs last disabled at (4299899): [<ffffffff87ee09fa>] _raw_spin_lock_irq+0x3a/0x80 kernel/locking/spinlock.c:167
softirqs last  enabled at (4299688): [<ffffffff882006cd>] __do_softirq+0x6cd/0x98c kernel/softirq.c:319
softirqs last disabled at (4299839): [<ffffffff8147a05b>] invoke_softirq kernel/softirq.c:373 [inline]
softirqs last disabled at (4299839): [<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 ***

1 lock held by syz-fuzzer/9579:
 #0: ffffc90000007d50 ((&ima_key_queue_timer)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:172 [inline]
 #0: ffffc90000007d50 ((&ima_key_queue_timer)){+.-.}, at: call_timer_fn+0xe0/0x780 kernel/time/timer.c:1394

stack backtrace:
CPU: 0 PID: 9579 Comm: syz-fuzzer 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: 0033:0x420671
Code: ca 48 81 fa 00 00 02 00 bf 00 00 02 00 48 0f 47 d7 48 89 54 24 48 31 c9 eb 07 49 8d 7b 08 48 89 f9 48 39 d1 0f 83 63 01 00 00 <48> 89 4c 24 50 48 85 c9 74 0b 83 fe 03 0f 83 f9 00 00 00 ff c6 0f
RSP: 002b:000000c000053ea8 EFLAGS: 00000283 ORIG_RAX: ffffffffffffff13
RAX: 0000000000203002 RBX: 00007f54178c6dd5 RCX: 0000000000000ab0
RDX: 0000000000001000 RSI: 0000000000000001 RDI: 0000000000000ab0
RBP: 000000c000053f28 R08: 00007f541791efff R09: 000000c00b4fb000
R10: 000000c00002d270 R11: 0000000000000aa8 R12: 00000000000000fa
R13: 000000c0091844b0 R14: 000000000000000d R15: 0000000000000000