RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ------------[ cut here ]------------ WARNING: CPU: 3 PID: 18147 at kernel/locking/lockdep.c:6305 lockdep_unregister_key+0x19a/0x250 kernel/locking/lockdep.c:6305 Modules linked in: CPU: 3 PID: 18147 Comm: syz-executor.3 Not tainted 5.14.0-rc2-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:lockdep_unregister_key+0x19a/0x250 kernel/locking/lockdep.c:6305 Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 8f 00 00 00 4d 89 7d 08 48 b8 22 01 00 00 00 00 ad de 48 89 43 08 eb 02 <0f> 0b 4c 89 f7 ba 01 00 00 00 48 89 ee e8 44 fd ff ff 4c 89 f7 e8 RSP: 0018:ffffc9002988f8a8 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff1ad8ffd RDX: 1ffffffff1fca217 RSI: 0000000000000004 RDI: ffffffff8fe510b8 RBP: ffff888029bc9128 R08: 0000000000000001 R09: 0000000000000003 R10: fffff52005311f0b R11: 0000000000000001 R12: 0000000000000246 R13: dffffc0000000000 R14: ffffffff8fcc8858 R15: ffff888029bc9020 FS: 0000000000000000(0000) GS:ffff88802cd00000(0063) knlGS:00000000f5539b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f5538fe4 CR3: 000000002051c000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: wq_unregister_lockdep kernel/workqueue.c:3468 [inline] alloc_workqueue+0xb31/0xef0 kernel/workqueue.c:4337 loop_configure+0x4d8/0x1580 drivers/block/loop.c:1199 lo_ioctl+0x403/0x1600 drivers/block/loop.c:1773 lo_compat_ioctl+0xb1/0x110 drivers/block/loop.c:1961 compat_blkdev_ioctl+0x3c2/0x870 block/ioctl.c:653 __do_compat_sys_ioctl+0x1c7/0x290 fs/ioctl.c:1167 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f3f549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5539418 EFLAGS: 00000296 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000004c00 RDX: 0000000000000005 RSI: 0000000000000006 RDI: 000000000816c000 RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000