================================ WARNING: inconsistent lock state 5.5.0-rc6-next-20200116-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.3/28863 [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: 6786 hardirqs last enabled at (6786): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (6786): [] _raw_spin_unlock_irq+0x23/0x80 kernel/locking/spinlock.c:199 hardirqs last disabled at (6785): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (6785): [] _raw_spin_lock_irq+0x3a/0x80 kernel/locking/spinlock.c:167 softirqs last enabled at (190): [] __do_softirq+0x6cd/0x98c kernel/softirq.c:319 softirqs last disabled at (6313): [] invoke_softirq kernel/softirq.c:373 [inline] softirqs last disabled at (6313): [] 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 *** 3 locks held by syz-executor.3/28863: #0: ffff888214900428 (sb_writers#3){.+.+}, at: sb_start_write include/linux/fs.h:1649 [inline] #0: ffff888214900428 (sb_writers#3){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:354 #1: ffff8880915657c8 (&type->i_mutex_dir_key#3/1){+.+.}, at: inode_lock_nested include/linux/fs.h:826 [inline] #1: ffff8880915657c8 (&type->i_mutex_dir_key#3/1){+.+.}, at: filename_create+0x17c/0x4f0 fs/namei.c:3705 #2: ffffc90000d98d50 ((&ima_key_queue_timer)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:172 [inline] #2: ffffc90000d98d50 ((&ima_key_queue_timer)){+.-.}, at: call_timer_fn+0xe0/0x780 kernel/time/timer.c:1394 stack backtrace: CPU: 1 PID: 28863 Comm: syz-executor.3 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:recently_deleted fs/ext4/ialloc.c:681 [inline] RIP: 0010:find_inode_bit.isra.0+0x1bf/0x520 fs/ext4/ialloc.c:720 Code: 85 c0 48 89 45 c0 0f 84 d7 01 00 00 e8 ca bc 72 ff 48 8b 75 c0 4c 89 ef e8 2e f2 0f 00 49 8d 7d 18 49 89 c0 89 d8 99 41 f7 ff <48> 98 89 d3 4a 8d 34 00 48 89 f8 48 c1 e8 03 42 80 3c 20 00 0f 85 RSP: 0018:ffffc90003467ac0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: 000000000000000e RBX: 00000000000000e9 RCX: ffffffff8212cdd9 RDX: 0000000000000009 RSI: ffffffff8212ce1d RDI: ffff888214900018 RBP: ffffc90003467b20 R08: 0000000000000422 R09: 0000000000000000 R10: ffffed1012415b32 R11: ffff8880920ad993 R12: dffffc0000000000 R13: ffff888214900000 R14: ffffc90003467c60 R15: 0000000000000010 __ext4_new_inode+0x16ab/0x4f80 fs/ext4/ialloc.c:912 ext4_symlink+0x4b7/0xf50 fs/ext4/namei.c:3287 vfs_symlink fs/namei.c:4198 [inline] vfs_symlink+0x373/0x5a0 fs/namei.c:4184 do_symlinkat+0x22b/0x290 fs/namei.c:4225 __do_sys_symlink fs/namei.c:4244 [inline] __se_sys_symlink fs/namei.c:4242 [inline] __x64_sys_symlink+0x59/0x80 fs/namei.c:4242 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b077 Code: 0f 1f 00 b8 5c 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 6d b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 58 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 4d b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffcf80e0208 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045b077 RDX: 00007ffcf80e02a3 RSI: 00000000004c0efa RDI: 00007ffcf80e0290 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000013 R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000001 R13: 00007ffcf80e0240 R14: 0000000000000000 R15: 00007ffcf80e0250