kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 9081 Comm: syz-executor0 Not tainted 5.0.0-rc4-next-20190130 #22 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debugfs_create_files+0x2e/0x140 block/blk-mq-debugfs.c:842 Code: 41 56 49 89 fe 41 55 41 54 49 89 f4 53 48 89 d3 e8 87 d0 f3 fd 49 8d 7e 58 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 e3 00 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b RSP: 0018:ffff88808fe87868 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffffffff8881d400 RCX: ffffc900061fd000 RDX: 0000000000000008 RSI: ffffffff838e48c9 RDI: 0000000000000047 RBP: ffff88808fe87888 R08: ffff888089708140 R09: fffffbfff13024e6 R10: fffffbfff13024e5 R11: ffffffff8981272b R12: ffff88809e1dee50 R13: ffff88809e1dee50 R14: ffffffffffffffef R15: ffff88809e1def18 FS: 00007f18d66a5700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe46031da20 CR3: 00000000a1728000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: blk_mq_debugfs_register+0xec/0x4e0 block/blk-mq-debugfs.c:865 blk_register_queue+0x1bc/0x370 block/blk-sysfs.c:944 __device_add_disk+0xe9f/0x13c0 block/genhd.c:723 device_add_disk+0x2b/0x40 block/genhd.c:739 add_disk include/linux/genhd.h:422 [inline] loop_add+0x71d/0xa30 drivers/block/loop.c:1999 loop_control_ioctl+0x18e/0x470 drivers/block/loop.c:2100 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x107b/0x17d0 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458089 Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f18d66a4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458089 RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 000000000000000b RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f18d66a56d4 R13: 00000000004c136e R14: 00000000004d3130 R15: 00000000ffffffff Modules linked in: ---[ end trace 258bff1706e4d1fd ]--- RIP: 0010:debugfs_create_files+0x2e/0x140 block/blk-mq-debugfs.c:842 Code: 41 56 49 89 fe 41 55 41 54 49 89 f4 53 48 89 d3 e8 87 d0 f3 fd 49 8d 7e 58 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 e3 00 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b RSP: 0018:ffff88808fe87868 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffffffff8881d400 RCX: ffffc900061fd000 RDX: 0000000000000008 RSI: ffffffff838e48c9 RDI: 0000000000000047 RBP: ffff88808fe87888 R08: ffff888089708140 R09: fffffbfff13024e6 R10: fffffbfff13024e5 R11: ffffffff8981272b R12: ffff88809e1dee50 R13: ffff88809e1dee50 R14: ffffffffffffffef R15: ffff88809e1def18 FS: 00007f18d66a5700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001091978 CR3: 00000000a1728000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400