kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 11463 Comm: syz-executor.4 Not tainted 4.19.48 #20 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kernfs_add_one+0x343/0x4d0 fs/kernfs/dir.c:811 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 52 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 70 48 8d 7b 08 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 1f 01 00 00 8b 5b 08 31 ff 83 RSP: 0018:ffff88805af37850 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000e6c3000 RDX: 0000000000000001 RSI: ffffffff81cced0b RDI: 0000000000000008 RBP: ffff88805af37890 R08: 1ffffffff111065c R09: fffffbfff111065d R10: fffffbfff111065c R11: ffffffff888832e7 R12: ffff8880a10499a0 R13: ffff8880a10499a0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fe6b1e71700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000758040 CR3: 000000008178e000 CR4: 00000000001406f0 Call Trace: kernfs_create_dir_ns+0xff/0x160 fs/kernfs/dir.c:1030 sysfs_create_dir_ns+0x131/0x290 fs/sysfs/dir.c:58 create_dir lib/kobject.c:88 [inline] kobject_add_internal lib/kobject.c:247 [inline] kobject_add_internal.cold+0xe5/0x5d1 lib/kobject.c:217 kobject_add_varg lib/kobject.c:382 [inline] kobject_add+0x150/0x1c0 lib/kobject.c:426 device_add+0x3cc/0x1760 drivers/base/core.c:1885 hci_register_dev+0x304/0x880 net/bluetooth/hci_core.c:3198 __vhci_create_device+0x2d0/0x5a0 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+0x2d6/0x470 drivers/bluetooth/hci_vhci.c:299 call_write_iter include/linux/fs.h:1820 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x587/0x810 fs/read_write.c:487 vfs_write+0x20c/0x560 fs/read_write.c:549 ksys_write+0x14f/0x2d0 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:608 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459279 Code: fd 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe6b1e70c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459279 RDX: 0000000000000002 RSI: 00000000200000c0 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe6b1e716d4 R13: 00000000004c8a39 R14: 00000000004df418 R15: 00000000ffffffff Modules linked in: kobject: 'loop2' (000000002143c359): kobject_uevent_env kobject: 'loop2' (000000002143c359): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'bluetooth' (00000000a8c02c55): kobject_add_internal: parent: 'virtual', set: '(null)' kobject: 'loop0' (0000000041101bd6): kobject_uevent_env kobject: 'loop0' (0000000041101bd6): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'hci2' (000000000aee3c80): kobject_add_internal: parent: 'bluetooth', set: 'devices' kobject: 'loop5' (0000000069cc2fa7): kobject_uevent_env kobject: 'hci2' (000000000aee3c80): kobject_uevent_env kobject: 'loop5' (0000000069cc2fa7): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'hci2' (000000000aee3c80): fill_kobj_path: path = '/devices/virtual/bluetooth/hci2' kobject: 'loop1' (00000000d3cda160): kobject_uevent_env kobject: 'loop1' (00000000d3cda160): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'rfkill319' (00000000a8da0eb2): kobject_add_internal: parent: 'hci2', set: 'devices' kobject: 'hci3' (00000000dda6155f): kobject_add_internal: parent: 'bluetooth', set: 'devices' kobject: 'loop3' (000000002bf16800): kobject_uevent_env kobject: 'hci3' (00000000dda6155f): kobject_uevent_env kobject: 'rfkill319' (00000000a8da0eb2): kobject_uevent_env kobject: 'hci3' (00000000dda6155f): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3' kobject: 'loop3' (000000002bf16800): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'rfkill319' (00000000a8da0eb2): fill_kobj_path: path = '/devices/virtual/bluetooth/hci2/rfkill319' ---[ end trace 6a564ccdce507b93 ]--- kobject: 'loop5' (0000000069cc2fa7): kobject_uevent_env kobject: 'rfkill320' (00000000ef31ced7): kobject_add_internal: parent: 'hci3', set: 'devices' kobject: 'loop5' (0000000069cc2fa7): fill_kobj_path: path = '/devices/virtual/block/loop5' RIP: 0010:kernfs_add_one+0x343/0x4d0 fs/kernfs/dir.c:811 kobject: 'loop3' (000000002bf16800): kobject_uevent_env kobject: 'rfkill320' (00000000ef31ced7): kobject_uevent_env Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 52 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 70 48 8d 7b 08 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 1f 01 00 00 8b 5b 08 31 ff 83 kobject: 'rfkill320' (00000000ef31ced7): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3/rfkill320' kobject: 'loop3' (000000002bf16800): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'rfkill320' (00000000ef31ced7): kobject_uevent_env kobject: 'rfkill319' (00000000a8da0eb2): kobject_uevent_env kobject: 'rfkill319' (00000000a8da0eb2): fill_kobj_path: path = '/devices/virtual/bluetooth/hci2/rfkill319' kobject: 'rfkill320' (00000000ef31ced7): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3/rfkill320' kobject: 'loop1' (00000000d3cda160): kobject_uevent_env kobject: 'rfkill320' (00000000ef31ced7): kobject_cleanup, parent (null) kobject: 'rfkill319' (00000000a8da0eb2): kobject_cleanup, parent (null) kobject: 'rfkill320' (00000000ef31ced7): calling ktype release kobject: 'rfkill319' (00000000a8da0eb2): calling ktype release kobject: 'rfkill320': free name kobject: 'loop1' (00000000d3cda160): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'hci3' (00000000dda6155f): kobject_uevent_env RSP: 0018:ffff88805af37850 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000e6c3000 kobject: 'hci3' (00000000dda6155f): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3' kobject: 'rfkill319': free name kobject: 'hci2' (000000000aee3c80): kobject_uevent_env kobject: 'hci3' (00000000dda6155f): kobject_cleanup, parent (null) RDX: 0000000000000001 RSI: ffffffff81cced0b RDI: 0000000000000008 RBP: ffff88805af37890 R08: 1ffffffff111065c R09: fffffbfff111065d kobject: 'hci3' (00000000dda6155f): calling ktype release kobject: 'hci3': free name kobject: 'hci2' (000000000aee3c80): fill_kobj_path: path = '/devices/virtual/bluetooth/hci2' kobject: 'hci3' (00000000e505b7d7): kobject_add_internal: parent: 'bluetooth', set: 'devices' R10: fffffbfff111065c R11: ffffffff888832e7 R12: ffff8880a10499a0 kobject: 'hci3' (00000000e505b7d7): kobject_uevent_env kobject: 'hci2' (000000000aee3c80): kobject_cleanup, parent (null) kobject: 'hci3' (00000000e505b7d7): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3' kobject: 'hci2' (000000000aee3c80): calling ktype release kobject: 'hci2': free name kobject: 'rfkill321' (000000001277a0b3): kobject_add_internal: parent: 'hci3', set: 'devices' R13: ffff8880a10499a0 R14: 0000000000000000 R15: 0000000000000000 kobject: 'rfkill321' (000000001277a0b3): kobject_uevent_env FS: 00007fe6b1e71700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 kobject: 'rfkill321' (000000001277a0b3): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3/rfkill321' kobject: 'hci2' (000000003e11408a): kobject_add_internal: parent: 'bluetooth', set: 'devices' kobject: 'rfkill321' (000000001277a0b3): kobject_uevent_env kobject: 'hci2' (000000003e11408a): kobject_uevent_env CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f55516aa000 CR3: 000000008178e000 CR4: 00000000001406e0