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: 16916 Comm: syz-executor0 Not tainted 4.20.0-rc6-next-20181213+ #170 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kernfs_add_one+0x342/0x4d0 fs/kernfs/dir.c:812 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 49 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d 70 49 8d 7d 08 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 16 01 00 00 45 8b 6d 08 31 ff RSP: 0018:ffff8881810475d0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff8881cbf5ab60 RCX: ffffc90012ebc000 RDX: 0000000000000001 RSI: ffffffff81fbee1a RDI: 0000000000000008 RBP: ffff888181047618 R08: fffffbfff1310d59 R09: fffffbfff1310d58 R10: fffffbfff1310d58 R11: ffffffff89886ac7 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f62b4a97700(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c22a000 CR3: 00000001895ee000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kernfs_create_dir_ns+0xf6/0x160 fs/kernfs/dir.c:1031 sysfs_create_dir_ns+0x19b/0x340 fs/sysfs/dir.c:58 create_dir lib/kobject.c:88 [inline] kobject_add_internal.cold.11+0x116/0x6af lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_add+0x13f/0x1b0 lib/kobject.c:426 device_add+0x445/0x18f0 drivers/base/core.c:1912 hci_register_dev+0x3b3/0x9c0 net/bluetooth/hci_core.c:3261 __vhci_create_device+0x2c1/0x580 drivers/bluetooth/hci_vhci.c:139 vhci_create_device drivers/bluetooth/hci_vhci.c:163 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:219 [inline] vhci_write+0x2de/0x470 drivers/bluetooth/hci_vhci.c:299 call_write_iter include/linux/fs.h:1863 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x72c/0xab0 fs/read_write.c:487 vfs_write+0x1fc/0x580 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457679 Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f62b4a96c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457679 RDX: 0000000000000002 RSI: 00000000200000c0 RDI: 0000000000000006 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f62b4a976d4 R13: 00000000004c5d4c R14: 00000000004da678 R15: 00000000ffffffff Modules linked in: kobject: 'loop4' (00000000fb731b5f): kobject_uevent_env ---[ end trace e2b7d3860addd042 ]--- kobject: 'loop4' (00000000fb731b5f): fill_kobj_path: path = '/devices/virtual/block/loop4' RIP: 0010:kernfs_add_one+0x342/0x4d0 fs/kernfs/dir.c:812 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 49 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d 70 49 8d 7d 08 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 16 01 00 00 45 8b 6d 08 31 ff kobject: 'loop5' (00000000c93e9ffc): kobject_uevent_env kobject: 'loop1' (00000000548321de): kobject_uevent_env kobject: 'loop1' (00000000548321de): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000c93e9ffc): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (00000000c93e9ffc): kobject_uevent_env kobject: 'loop3' (00000000b24421cd): kobject_uevent_env RSP: 0018:ffff8881810475d0 EFLAGS: 00010202 kobject: 'loop5' (00000000c93e9ffc): fill_kobj_path: path = '/devices/virtual/block/loop5' RAX: dffffc0000000000 RBX: ffff8881cbf5ab60 RCX: ffffc90012ebc000 kobject: 'loop2' (000000007051f8a1): kobject_uevent_env kobject: 'loop3' (00000000b24421cd): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (000000007051f8a1): fill_kobj_path: path = '/devices/virtual/block/loop2' RDX: 0000000000000001 RSI: ffffffff81fbee1a RDI: 0000000000000008 kobject: 'loop4' (00000000fb731b5f): kobject_uevent_env gfs2: not a GFS2 filesystem kobject: 'loop4' (00000000fb731b5f): fill_kobj_path: path = '/devices/virtual/block/loop4' gfs2: not a GFS2 filesystem RBP: ffff888181047618 R08: fffffbfff1310d59 R09: fffffbfff1310d58 kobject: 'loop0' (00000000a1776ce8): kobject_uevent_env kobject: 'loop1' (00000000548321de): kobject_uevent_env R10: fffffbfff1310d58 R11: ffffffff89886ac7 R12: 0000000000000000 kobject: 'loop1' (00000000548321de): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000a1776ce8): fill_kobj_path: path = '/devices/virtual/block/loop0' F2FS-fs (loop2): Magic Mismatch, valid(0xf2f52010) - read(0x0) R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 kobject: 'loop4' (00000000fb731b5f): kobject_uevent_env FS: 00007f62b4a97700(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000 kobject: 'loop4' (00000000fb731b5f): fill_kobj_path: path = '/devices/virtual/block/loop4' CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 F2FS-fs (loop2): Can't find valid F2FS filesystem in 1th superblock CR2: 0000001b2c22c000 CR3: 00000001895ee000 CR4: 00000000001426e0 kobject: 'loop3' (00000000b24421cd): kobject_uevent_env DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'loop3' (00000000b24421cd): fill_kobj_path: path = '/devices/virtual/block/loop3' DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 F2FS-fs (loop2): Invalid log sectors per block(70778883) log sectorsize(9)