================================
WARNING: inconsistent lock state
5.5.0-rc6-next-20200116-syzkaller #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
udevd/4312 [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: 2158888
hardirqs last enabled at (2158888): [<ffffffff87ee0813>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
hardirqs last enabled at (2158888): [<ffffffff87ee0813>] _raw_spin_unlock_irq+0x23/0x80 kernel/locking/spinlock.c:199
hardirqs last disabled at (2158887): [<ffffffff87ee09fa>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline]
hardirqs last disabled at (2158887): [<ffffffff87ee09fa>] _raw_spin_lock_irq+0x3a/0x80 kernel/locking/spinlock.c:167
softirqs last enabled at (2154548): [<ffffffff882006cd>] __do_softirq+0x6cd/0x98c kernel/softirq.c:319
softirqs last disabled at (2157307): [<ffffffff8147a05b>] invoke_softirq kernel/softirq.c:373 [inline]
softirqs last disabled at (2157307): [<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 udevd/4312:
#0: ffffc90000d98d50 ((&ima_key_queue_timer)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:172 [inline]
#0: ffffc90000d98d50 ((&ima_key_queue_timer)){+.-.}, at: call_timer_fn+0xe0/0x780 kernel/time/timer.c:1394
stack backtrace:
CPU: 1 PID: 4312 Comm: udevd 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:aa_cred_raw_label security/apparmor/include/cred.h:49 [inline]
RIP: 0010:aa_current_raw_label security/apparmor/include/cred.h:89 [inline]
RIP: 0010:end_current_label_crit_section security/apparmor/include/cred.h:122 [inline]
RIP: 0010:aa_sk_perm+0x24e/0xb00 security/apparmor/net.c:173
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 40 08 00 00 48 8b 9b b0 06 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 88 00 00 00 <48> 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 3b 08 00 00 48 c7 c2 40 9d
RSP: 0018:ffffc90001f6f938 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: ffff888093aec000 RCX: 1ffffffff154ac06
RDX: 1ffff110126c2d8e RSI: ffffffff83720d71 RDI: ffff888093aec088
RBP: ffffc90001f6fa00 R08: ffff8880936165c0 R09: fffff520003edf8c
R10: fffff520003edf8b R11: ffffc90001f6fc5f R12: ffff88821bc4bab0
R13: ffffffff888c1280 R14: 0000000000000000 R15: ffff88809651aa58
aa_sock_msg_perm.isra.0+0xba/0x170 security/apparmor/lsm.c:938
apparmor_socket_sendmsg+0x2a/0x30 security/apparmor/lsm.c:949
security_socket_sendmsg+0x77/0xc0 security/security.c:2069
sock_sendmsg+0x45/0x130 net/socket.c:669
____sys_sendmsg+0x753/0x880 net/socket.c:2343
___sys_sendmsg+0x100/0x170 net/socket.c:2397
__sys_sendmsg+0x105/0x1d0 net/socket.c:2430
__do_sys_sendmsg net/socket.c:2439 [inline]
__se_sys_sendmsg net/socket.c:2437 [inline]
__x64_sys_sendmsg+0x78/0xb0 net/socket.c:2437
do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f2cfbdf1320
Code: 02 48 83 c8 ff eb 8d 48 8b 05 14 7b 2a 00 f7 da 64 89 10 48 83 c8 ff eb c9 90 83 3d d5 d2 2a 00 00 75 10 b8 2e 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e ba 00 00 48 89 04 24
RSP: 002b:00007ffe8e690e58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2cfbdf1320
RDX: 0000000000000000 RSI: 00007ffe8e690ea0 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007f2cfbe39c20
R10: 736563697665642f R11: 0000000000000246 R12: 0000000001b972d0
R13: 00000000000000ad R14: 0000000001bcb8e0 R15: 0000000000000703