================================ WARNING: inconsistent lock state 5.5.0-rc6-next-20200114-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.5/9563 [HC0[0]:SC1[1]:HE1:SE0] takes: ffffffff8a03aa18 (ima_keys_lock){+.?.}, at: spin_lock include/linux/spinlock.h:338 [inline] ffffffff8a03aa18 (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:940 do_initcall_level init/main.c:1014 [inline] do_initcalls init/main.c:1022 [inline] do_basic_setup init/main.c:1039 [inline] kernel_init_freeable+0x4ca/0x570 init/main.c:1223 kernel_init+0x12/0x1bf init/main.c:1130 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 irq event stamp: 319180 hardirqs last enabled at (319180): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (319180): [] _raw_spin_unlock_irq+0x23/0x80 kernel/locking/spinlock.c:199 hardirqs last disabled at (319179): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (319179): [] _raw_spin_lock_irq+0x3a/0x80 kernel/locking/spinlock.c:167 softirqs last enabled at (316932): [] __do_softirq+0x6cd/0x98c kernel/softirq.c:319 softirqs last disabled at (319177): [] invoke_softirq kernel/softirq.c:373 [inline] softirqs last disabled at (319177): [] 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); lock(ima_keys_lock); *** DEADLOCK *** 1 lock held by syz-executor.5/9563: #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: 9563 Comm: syz-executor.5 Not tainted 5.5.0-rc6-next-20200114-syzkaller #0 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+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 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline] RIP: 0010:slab_alloc mm/slab.c:3313 [inline] RIP: 0010:kmem_cache_alloc+0x283/0x710 mm/slab.c:3484 Code: 7e 0f 85 dc fe ff ff e8 0c 3f 4d ff e9 d2 fe ff ff e8 31 aa c7 ff 48 83 3d 21 84 00 08 00 0f 84 51 03 00 00 48 8b 7d d0 57 9d <0f> 1f 44 00 00 e9 68 fe ff ff 31 d2 be 35 02 00 00 48 c7 c7 2e a1 RSP: 0018:ffffc9000641fd18 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: 0000000000000cc0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000286 RBP: ffffc9000641fd80 R08: ffff8880543b22c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880aa5f8a80 R13: ffff8880aa5f8a80 R14: 0000000000000cc0 R15: ffff8880a8916600 getname_flags fs/namei.c:138 [inline] getname_flags+0xd6/0x5b0 fs/namei.c:128 getname fs/namei.c:209 [inline] user_path_mountpoint_at+0x29/0x50 fs/namei.c:2820 ksys_umount+0x164/0xef0 fs/namespace.c:1683 __do_sys_umount fs/namespace.c:1709 [inline] __se_sys_umount fs/namespace.c:1707 [inline] __x64_sys_umount+0x54/0x80 fs/namespace.c:1707 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45d977 Code: 64 89 04 25 d0 02 00 00 58 5f ff d0 48 89 c7 e8 2f be ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 4d 8c fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffeff269038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: ffffffffffffffda RBX: 000000000004d5f3 RCX: 000000000045d977 RDX: 000000000000000c RSI: 0000000000000002 RDI: 00007ffeff26a170 RBP: 000000000000003c R08: 0000000000000001 R09: 0000000001dc6940 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffeff26a170 R13: 00007ffeff26a160 R14: 0000000000000000 R15: 00007ffeff26a170