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: 0 PID: 9064 Comm: syz-executor3 Not tainted 5.0.0-rc4-next-20190131 #23 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 67 30 4a fe 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:ffff88805b06fa20 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffffffff87a1de20 RCX: ffffc9000c452000 RDX: 0000000000000008 RSI: ffffffff8325c6e9 RDI: 0000000000000047 RBP: ffff88805b06fa40 R08: ffff88805b6bc100 R09: fffffbfff11024e6 R10: fffffbfff11024e5 R11: ffffffff8881272b R12: ffff8880a1798100 R13: ffff8880a1798100 R14: ffffffffffffffef R15: ffff8880a17981c8 FS: 00007f21cd336700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2df32000 CR3: 0000000093142000 CR4: 00000000001406f0 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+0xccc/0x1160 block/genhd.c:723 device_add_disk+0x2b/0x40 block/genhd.c:739 add_disk include/linux/genhd.h:422 [inline] loop_add+0x635/0x8d0 drivers/block/loop.c:1999 loop_control_ioctl drivers/block/loop.c:2100 [inline] loop_control_ioctl+0x165/0x360 drivers/block/loop.c:2082 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 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+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e39 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f21cd335c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e39 RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000008 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f21cd3366d4 R13: 00000000004c1108 R14: 00000000004d2ed0 R15: 00000000ffffffff Modules linked in: ---[ end trace 765a0f33da5c88ee ]--- 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 67 30 4a fe 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:ffff88805b06fa20 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffffffff87a1de20 RCX: ffffc9000c452000 RDX: 0000000000000008 RSI: ffffffff8325c6e9 RDI: 0000000000000047 RBP: ffff88805b06fa40 R08: ffff88805b6bc100 R09: fffffbfff11024e6 R10: fffffbfff11024e5 R11: ffffffff8881272b R12: ffff8880a1798100 R13: ffff8880a1798100 R14: ffffffffffffffef R15: ffff8880a17981c8 FS: 00007f21cd336700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000940004 CR3: 0000000093142000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400