===================================== WARNING: bad unlock balance detected! 5.1.0-rc4+ #66 Not tainted ------------------------------------- syz-executor.1/17297 is trying to release lock (rcu_callback) at: [] __write_once_size include/linux/compiler.h:220 [inline] [] __rcu_reclaim kernel/rcu/rcu.h:226 [inline] [] rcu_do_batch kernel/rcu/tree.c:2475 [inline] [] invoke_rcu_callbacks kernel/rcu/tree.c:2788 [inline] [] rcu_core+0x906/0x13a0 kernel/rcu/tree.c:2769 but there are no more locks to release! other info that might help us debug this: 1 lock held by syz-executor.1/17297: #0: 00000000248f8dcd (&type->s_umount_key#59/1){+.+.}, at: alloc_super+0x158/0x890 fs/super.c:228 stack backtrace: CPU: 0 PID: 17297 Comm: syz-executor.1 Not tainted 5.1.0-rc4+ #66 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+0x172/0x1f0 lib/dump_stack.c:113 print_unlock_imbalance_bug kernel/locking/lockdep.c:3754 [inline] print_unlock_imbalance_bug.cold+0x114/0x123 kernel/locking/lockdep.c:3731 __lock_release kernel/locking/lockdep.c:3970 [inline] lock_release+0x67e/0xa00 kernel/locking/lockdep.c:4230 rcu_lock_release include/linux/rcupdate.h:215 [inline] __rcu_reclaim kernel/rcu/rcu.h:228 [inline] rcu_do_batch kernel/rcu/tree.c:2475 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2788 [inline] rcu_core+0x92e/0x13a0 kernel/rcu/tree.c:2769 __do_softirq+0x266/0x95a kernel/softirq.c:293 invoke_softirq kernel/softirq.c:374 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:414 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x14a/0x570 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:767 [inline] RIP: 0010:console_unlock+0xb82/0xed0 kernel/printk/printk.c:2460 Code: 92 88 48 c1 e8 03 42 80 3c 30 00 0f 85 e4 02 00 00 48 83 3d 4f fa 37 07 00 0f 84 91 01 00 00 e8 84 f0 15 00 48 8b 7d 98 57 9d <0f> 1f 44 00 00 e9 6b ff ff ff e8 6f f0 15 00 48 8b 7d 08 c7 05 11 RSP: 0018:ffff88805aa4f8d0 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 0000000000000200 RCX: ffffc90008209000 RDX: 00000000000101de RSI: ffffffff815a9c2c RDI: 0000000000000212 RBP: ffff88805aa4f958 R08: ffff888099a66100 R09: fffffbfff11335b9 R10: fffffbfff11335b8 R11: 0000000000000001 R12: 0000000000000000 R13: ffffffff84210cf0 R14: dffffc0000000000 R15: ffffffff88f90710 vprintk_emit+0x280/0x6d0 kernel/printk/printk.c:1975 vprintk_default+0x28/0x30 kernel/printk/printk.c:2002 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:2035 __ntfs_error.cold+0x91/0xc7 fs/ntfs/debug.c:103 ntfs_fill_super+0x2015/0x3150 fs/ntfs/super.c:2792 mount_bdev+0x307/0x3c0 fs/super.c:1346 ntfs_mount+0x35/0x40 fs/ntfs/super.c:3065 legacy_get_tree+0xf2/0x200 fs/fs_context.c:584 vfs_get_tree+0x123/0x450 fs/super.c:1481 do_new_mount fs/namespace.c:2622 [inline] do_mount+0x1436/0x2c40 fs/namespace.c:2942 ksys_mount+0xdb/0x150 fs/namespace.c:3151 __do_sys_mount fs/namespace.c:3165 [inline] __se_sys_mount fs/namespace.c:3162 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3162 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b69a Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 2d 8e fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 0a 8e fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007f2f99d0ba88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f2f99d0bb40 RCX: 000000000045b69a RDX: 00007f2f99d0bae0 RSI: 0000000020000140 RDI: 00007f2f99d0bb00 RBP: 0000000000000000 R08: 00007f2f99d0bb40 R09: 00007f2f99d0bae0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000008 R13: 00000000004c7802 R14: 00000000004dd850 R15: 00000000ffffffff