================================ WARNING: inconsistent lock state 5.5.0-rc6-next-20200116-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.5/10536 [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: 5262 hardirqs last enabled at (5262): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (5262): [] _raw_spin_unlock_irq+0x23/0x80 kernel/locking/spinlock.c:199 hardirqs last disabled at (5261): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (5261): [] _raw_spin_lock_irq+0x3a/0x80 kernel/locking/spinlock.c:167 softirqs last enabled at (4894): [] __do_softirq+0x6cd/0x98c kernel/softirq.c:319 softirqs last disabled at (5259): [] invoke_softirq kernel/softirq.c:373 [inline] softirqs last disabled at (5259): [] 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.5/10536: #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: 10536 Comm: syz-executor.5 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: __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:kmem_cache_free+0xab/0x320 mm/slab.c:3695 Code: e8 4a 29 00 00 84 c0 74 77 41 f7 c6 00 02 00 00 74 4f e8 48 53 c7 ff 48 83 3d b8 d6 ff 07 00 0f 84 fa 01 00 00 4c 89 f7 57 9d <0f> 1f 44 00 00 4c 8b 6d 08 0f 1f 44 00 00 65 8b 05 80 cf 4d 7e 83 RSP: 0018:ffffc9000e297968 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff88809f0ab670 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000286 RBP: ffffc9000e297988 R08: ffff88804d506380 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809fe00e00 R13: ffffffff81452c2d R14: 0000000000000286 R15: 00000000000011c6 vm_area_free+0x1d/0x30 kernel/fork.c:370 remove_vma+0x13f/0x180 mm/mmap.c:181 exit_mmap+0x361/0x530 mm/mmap.c:3156 __mmput kernel/fork.c:1082 [inline] mmput+0x179/0x4d0 kernel/fork.c:1103 exit_mm kernel/exit.c:485 [inline] do_exit+0xae4/0x2f80 kernel/exit.c:788 do_group_exit+0x135/0x360 kernel/exit.c:899 get_signal+0x47c/0x24f0 kernel/signal.c:2734 do_signal+0x87/0x1700 arch/x86/kernel/signal.c:813 exit_to_usermode_loop+0x286/0x380 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath arch/x86/entry/common.c:278 [inline] do_syscall_64+0x676/0x790 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b399 Code: Bad RIP value. RSP: 002b:00007f3a2f59ac78 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: 000000000000000a RBX: 00007f3a2f59b6d4 RCX: 000000000045b399 RDX: 040000000000002d RSI: 0000000020002d80 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000020000180 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000890 R14: 00000000004c9f7f R15: 000000000075bf2c