Hello, syzbot found the following issue on: HEAD commit: 1d67c8d993ba Merge tag 'soc-fixes-5.14-1' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11766c5a300000 kernel config: https://syzkaller.appspot.com/x/.config?x=4743a765b066cc1c dashboard link: https://syzkaller.appspot.com/bug?extid=1e80b07ec236d945017f Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1e80b07ec236d945017f@xxxxxxxxxxxxxxxxxxxxxxxxx RBP: 0000000000000005 R08: 0000000000000000 R09: ffffffffffffffff R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 0000000000000004 R14: 0000000020000300 R15: 0000000000000000 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 13508 at kernel/locking/lockdep.c:6305 lockdep_unregister_key+0x19a/0x250 kernel/locking/lockdep.c:6305 Modules linked in: CPU: 0 PID: 13508 Comm: syz-executor.0 Not tainted 5.14.0-rc1-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:ffffc90001bc78e0 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff1ad8795 RDX: 1ffffffff1fcb30e RSI: 0000000000000004 RDI: ffffffff8fe59870 RBP: ffff88801db52928 R08: 0000000000000001 R09: 0000000000000003 R10: fffff52000378f12 R11: 0000000000000000 R12: 0000000000000246 R13: dffffc0000000000 R14: ffffffff8fcd0868 R15: ffff88801db52820 FS: 00007f7d4ceaa700(0000) GS:ffff88802ca00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7d4cea9f78 CR3: 0000000078c46000 CR4: 0000000000150ef0 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 blkdev_ioctl+0x2a1/0x6d0 block/ioctl.c:585 block_ioctl+0xf9/0x140 fs/block_dev.c:1602 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:1069 [inline] __se_sys_ioctl fs/ioctl.c:1055 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x466397 Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 48 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7d4cea9f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004afcc0 RCX: 0000000000466397 RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000005 RBP: 0000000000000005 R08: 0000000000000000 R09: ffffffffffffffff R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 0000000000000004 R14: 0000000020000300 R15: 0000000000000000 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
