================================ WARNING: inconsistent lock state 5.5.0-rc6-next-20200116-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.0/9936 [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: 514224 hardirqs last enabled at (514224): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (514224): [] _raw_spin_unlock_irq+0x23/0x80 kernel/locking/spinlock.c:199 hardirqs last disabled at (514223): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (514223): [] _raw_spin_lock_irq+0x3a/0x80 kernel/locking/spinlock.c:167 softirqs last enabled at (513522): [] memcpy include/linux/string.h:426 [inline] softirqs last enabled at (513522): [] fpu__copy+0x17e/0x8c0 arch/x86/kernel/fpu/core.c:195 softirqs last disabled at (513749): [] invoke_softirq kernel/softirq.c:373 [inline] softirqs last disabled at (513749): [] 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 *** 4 locks held by syz-executor.0/9936: #0: ffffffff89c25ad0 (dup_mmap_sem.rw_sem){.+.+}, at: dup_mmap kernel/fork.c:490 [inline] #0: ffffffff89c25ad0 (dup_mmap_sem.rw_sem){.+.+}, at: dup_mm+0x104/0x1430 kernel/fork.c:1360 #1: ffff888097027298 (&mm->mmap_sem#2){++++}, at: dup_mmap kernel/fork.c:491 [inline] #1: ffff888097027298 (&mm->mmap_sem#2){++++}, at: dup_mm+0x120/0x1430 kernel/fork.c:1360 #2: ffff88806059f598 (&mm->mmap_sem/1){+.+.}, at: dup_mmap kernel/fork.c:500 [inline] #2: ffff88806059f598 (&mm->mmap_sem/1){+.+.}, at: dup_mm+0x165/0x1430 kernel/fork.c:1360 #3: ffffc90000d98d50 ((&ima_key_queue_timer)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:172 [inline] #3: ffffc90000d98d50 ((&ima_key_queue_timer)){+.-.}, at: call_timer_fn+0xe0/0x780 kernel/time/timer.c:1394 stack backtrace: CPU: 1 PID: 9936 Comm: syz-executor.0 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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x4f/0x80 kernel/locking/spinlock.c:199 Code: c0 88 ba b3 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 52 b2 c5 01 00 74 20 fb 66 0f 1f 44 00 00 01 00 00 00 e8 67 d8 62 f9 65 8b 05 38 16 14 78 85 c0 74 06 41 RSP: 0018:ffffc900021cf638 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1367751 RBX: ffff88809f504040 RCX: 0000000000000006 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff88809f5048dc RBP: ffffc900021cf640 R08: 1ffffffff16a51a6 R09: fffffbfff16a51a7 R10: fffffbfff16a51a6 R11: ffffffff8b528d37 R12: ffff8880ae937500 R13: ffff88805589c480 R14: 0000000000000000 R15: 0000000000000001 finish_lock_switch kernel/sched/core.c:3124 [inline] finish_task_switch+0x147/0x750 kernel/sched/core.c:3224 context_switch kernel/sched/core.c:3388 [inline] __schedule+0x93c/0x1f90 kernel/sched/core.c:4081 preempt_schedule_common+0x4f/0xe0 kernel/sched/core.c:4236 preempt_schedule+0x4b/0x60 kernel/sched/core.c:4261 ___preempt_schedule+0x16/0x18 arch/x86/entry/thunk_64.S:50 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock+0x3c/0x40 kernel/locking/spinlock.c:183 spin_unlock include/linux/spinlock.h:378 [inline] copy_pte_range mm/memory.c:852 [inline] copy_pmd_range mm/memory.c:892 [inline] copy_pud_range mm/memory.c:926 [inline] copy_p4d_range mm/memory.c:948 [inline] copy_page_range+0x1185/0x20e0 mm/memory.c:1010 dup_mmap kernel/fork.c:604 [inline] dup_mm+0xa67/0x1430 kernel/fork.c:1360 copy_mm kernel/fork.c:1416 [inline] copy_process+0x2987/0x7290 kernel/fork.c:2081 _do_fork+0x146/0x1090 kernel/fork.c:2430 __do_sys_clone kernel/fork.c:2585 [inline] __se_sys_clone kernel/fork.c:2566 [inline] __x64_sys_clone+0x19a/0x260 kernel/fork.c:2566 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45996a Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00 RSP: 002b:00007ffcdf95ef10 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffcdf95ef10 RCX: 000000000045996a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffcdf95ef50 R08: 0000000000000001 R09: 0000000000faf940 R10: 0000000000fafc10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffcdf95efa0