kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN kobject: 'loop0' (00000000ae12c57f): kobject_uevent_env CPU: 0 PID: 12110 Comm: syz-executor.5 Not tainted 4.19.67 #41 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kobject: 'hci1' (00000000491af8a2): kobject_add_internal: parent: 'bluetooth', set: 'devices' 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:ffff8880579cf850 EFLAGS: 00010202 kobject: 'rfkill160' (00000000980e0ac8): kobject_uevent_env RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900108c4000 RDX: 0000000000000001 RSI: ffffffff81cd8dbb RDI: 0000000000000008 RBP: ffff8880579cf890 R08: 1ffffffff1110d7c R09: fffffbfff1110d7d R10: fffffbfff1110d7c R11: ffffffff88886be7 R12: ffff8880a13f82a0 kobject: 'loop0' (00000000ae12c57f): fill_kobj_path: path = '/devices/virtual/block/loop0' R13: ffff8880a13f82a0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f5ffdd04700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 kobject: 'rfkill160' (00000000980e0ac8): fill_kobj_path: path = '/devices/virtual/bluetooth/hci4/rfkill160' CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000070f158 CR3: 000000008f2e1000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'hci1' (00000000491af8a2): kobject_uevent_env DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 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 kobject: 'rfkill160' (00000000980e0ac8): kobject_cleanup, parent (null) device_add+0x3cc/0x1760 drivers/base/core.c:1885 kobject: 'hci1' (00000000491af8a2): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1' 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 kobject: 'rfkill161' (00000000044521ae): kobject_add_internal: parent: 'hci1', set: 'devices' vfs_write+0x20c/0x560 fs/read_write.c:549 kobject: 'rfkill160' (00000000980e0ac8): calling ktype release ksys_write+0x14f/0x2d0 fs/read_write.c:599 kobject: 'rfkill160': free name __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 kobject: 'hci4' (00000000558a3f39): kobject_uevent_env RIP: 0033:0x459829 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:00007f5ffdd03c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829 RDX: 0000000000000002 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5ffdd046d4 R13: 00000000004c9bc3 R14: 00000000004e1310 R15: 00000000ffffffff Modules linked in: kobject: 'rfkill161' (00000000044521ae): kobject_uevent_env kobject: 'hci4' (00000000558a3f39): fill_kobj_path: path = '/devices/virtual/bluetooth/hci4' kobject: 'rfkill161' (00000000044521ae): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1/rfkill161' kobject: 'rfkill159' (00000000b172636a): kobject_uevent_env kobject: 'rfkill161' (00000000044521ae): kobject_uevent_env kobject: 'hci4' (00000000558a3f39): kobject_cleanup, parent (null) kobject: 'hci4' (000000006a336bd5): kobject_add_internal: parent: 'bluetooth', set: 'devices' kobject: 'hci4' (00000000558a3f39): calling ktype release kobject: 'hci4': free name kobject: 'hci4' (000000006a336bd5): kobject_uevent_env kobject: 'rfkill159' (00000000b172636a): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3/rfkill159' kobject: 'hci4' (000000006a336bd5): fill_kobj_path: path = '/devices/virtual/bluetooth/hci4' kobject: 'rfkill159' (00000000b172636a): kobject_cleanup, parent (null) kobject: 'loop2' (0000000070a6d446): kobject_uevent_env kobject: 'rfkill159' (00000000b172636a): calling ktype release kobject: 'rfkill159': free name kobject: 'hci3' (00000000e225f7b8): kobject_uevent_env ---[ end trace e4ba5a5df0236a31 ]--- kobject: 'hci3' (00000000e225f7b8): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3' kobject: 'loop2' (0000000070a6d446): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'hci3' (00000000e225f7b8): kobject_cleanup, parent (null) RIP: 0010:kernfs_add_one+0x343/0x4d0 fs/kernfs/dir.c:811 kobject: 'hci3' (00000000e225f7b8): calling ktype release kobject: 'rfkill162' (00000000363108df): kobject_add_internal: parent: 'hci4', set: 'devices' kobject: 'hci3': free name kobject: 'hci3' (000000005f6ed680): kobject_add_internal: parent: 'bluetooth', set: 'devices' kobject: 'rfkill161' (00000000044521ae): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1/rfkill161' 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: 'loop3' (000000000dd9da5f): kobject_uevent_env kobject: 'rfkill162' (00000000363108df): kobject_uevent_env kobject: 'loop3' (000000000dd9da5f): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'hci3' (000000005f6ed680): kobject_uevent_env kobject: 'loop3' (000000000dd9da5f): kobject_uevent_env kobject: 'rfkill162' (00000000363108df): fill_kobj_path: path = '/devices/virtual/bluetooth/hci4/rfkill162' kobject: 'hci5' (00000000c378f510): kobject_add_internal: parent: 'bluetooth', set: 'devices' kobject: 'loop1' (00000000f559bc9c): kobject_uevent_env kobject: 'hci3' (000000005f6ed680): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3' kobject: 'loop3' (000000000dd9da5f): fill_kobj_path: path = '/devices/virtual/block/loop3' RSP: 0018:ffff8880579cf850 EFLAGS: 00010202 kobject: 'hci5' (00000000c378f510): kobject_uevent_env kobject: 'rfkill161' (00000000044521ae): kobject_cleanup, parent (null) kobject: 'rfkill163' (0000000035fecc4f): kobject_add_internal: parent: 'hci3', set: 'devices' kobject: 'rfkill161' (00000000044521ae): calling ktype release kobject: 'loop1' (00000000f559bc9c): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'rfkill162' (00000000363108df): kobject_uevent_env kobject: 'rfkill161': free name kobject: 'hci5' (00000000c378f510): fill_kobj_path: path = '/devices/virtual/bluetooth/hci5' kobject: 'hci1' (00000000491af8a2): kobject_uevent_env kobject: 'rfkill162' (00000000363108df): fill_kobj_path: path = '/devices/virtual/bluetooth/hci4/rfkill162' kobject: 'rfkill163' (0000000035fecc4f): kobject_uevent_env RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900108c4000 kobject: 'loop3' (000000000dd9da5f): kobject_uevent_env kobject: 'hci1' (00000000491af8a2): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1' RDX: 0000000000000001 RSI: ffffffff81cd8dbb RDI: 0000000000000008 kobject: 'rfkill163' (0000000035fecc4f): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3/rfkill163' kobject: 'hci1' (00000000491af8a2): kobject_cleanup, parent (null) RBP: ffff8880579cf890 R08: 1ffffffff1110d7c R09: fffffbfff1110d7d kobject: 'loop3' (000000000dd9da5f): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'hci1' (00000000491af8a2): calling ktype release R10: fffffbfff1110d7c R11: ffffffff88886be7 R12: ffff8880a13f82a0 kobject: 'hci1': free name kobject: 'loop3' (000000000dd9da5f): kobject_uevent_env R13: ffff8880a13f82a0 R14: 0000000000000000 R15: 0000000000000000 kobject: 'rfkill164' (00000000b9af6d8b): kobject_add_internal: parent: 'hci5', set: 'devices' kobject: 'loop3' (000000000dd9da5f): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'rfkill164' (00000000b9af6d8b): kobject_uevent_env kobject: 'loop3' (000000000dd9da5f): kobject_uevent_env FS: 00007f5ffdd04700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 kobject: 'rfkill164' (00000000b9af6d8b): fill_kobj_path: path = '/devices/virtual/bluetooth/hci5/rfkill164' CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'loop3' (000000000dd9da5f): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'rfkill162' (00000000363108df): kobject_cleanup, parent (null) kobject: 'rfkill163' (0000000035fecc4f): kobject_uevent_env CR2: 0000001b2e125000 CR3: 000000008f2e1000 CR4: 00000000001406e0 kobject: 'loop4' (00000000590ce61a): kobject_uevent_env kobject: 'rfkill163' (0000000035fecc4f): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3/rfkill163' kobject: 'rfkill162' (00000000363108df): calling ktype release kobject: 'hci1' (00000000a3d05a52): kobject_add_internal: parent: 'bluetooth', set: 'devices' DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400