Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 2 UID: 0 PID: 4299 Comm: syz.9.9282 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:kernfs_rename_ns+0x3b/0xa70 fs/kernfs/dir.c:1752 Code: 48 89 fb 4c 8d 73 30 48 83 ec 28 48 89 14 24 48 89 4c 24 08 e8 36 48 54 ff 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 16 09 00 00 48 8b 43 30 48 85 c0 0f 84 ca 08 00 RSP: 0000:ffffc900244c7a20 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000c191000 RDX: 0000000000000006 RSI: ffffffff82b2028a RDI: 0000000000000000 RBP: ffff888040fb9d20 R08: 0000000000000007 R09: 0000000000000000 R10: 000000007fffffff R11: 0000000000000000 R12: ffff8880279386c0 R13: ffff888066b8b340 R14: 0000000000000030 R15: 1ffff92004898f50 FS: 0000000000000000(0000) GS:ffff8880975e3000(0063) knlGS:00000000f5436b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f5414ff4 CR3: 00000000759a9000 CR4: 0000000000352ef0 DR0: 0000000000000004 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: kobject_move+0x127/0x260 lib/kobject.c:569 device_move+0xa9/0x1140 drivers/base/core.c:4606 hci_conn_del_sysfs+0x86/0x1a0 net/bluetooth/hci_sysfs.c:75 hci_conn_cleanup net/bluetooth/hci_conn.c:173 [inline] hci_conn_del+0x506/0x1180 net/bluetooth/hci_conn.c:1234 hci_conn_hash_flush+0x186/0x280 net/bluetooth/hci_conn.c:2638 hci_dev_do_reset net/bluetooth/hci_core.c:566 [inline] hci_dev_reset+0x249/0x650 net/bluetooth/hci_core.c:610 hci_sock_ioctl+0x5c5/0x7e0 net/bluetooth/hci_sock.c:1140 hci_sock_compat_ioctl+0x43/0x80 net/bluetooth/hci_sock.c:1181 compat_sock_ioctl+0x179/0x760 net/socket.c:3526 __do_compat_sys_ioctl fs/ioctl.c:695 [inline] __se_compat_sys_ioctl fs/ioctl.c:638 [inline] __ia32_compat_sys_ioctl+0x2cf/0x360 fs/ioctl.c:638 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xde/0x660 arch/x86/entry/syscall_32.c:307 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:332 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7f76579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 2e 8d b4 26 00 00 00 00 8d b4 26 00 00 00 RSP: 002b:00000000f543650c EFLAGS: 00000292 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000400448cb RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kernfs_rename_ns+0x3b/0xa70 fs/kernfs/dir.c:1752 Code: 48 89 fb 4c 8d 73 30 48 83 ec 28 48 89 14 24 48 89 4c 24 08 e8 36 48 54 ff 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 16 09 00 00 48 8b 43 30 48 85 c0 0f 84 ca 08 00 RSP: 0000:ffffc900244c7a20 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000c191000 RDX: 0000000000000006 RSI: ffffffff82b2028a RDI: 0000000000000000 RBP: ffff888040fb9d20 R08: 0000000000000007 R09: 0000000000000000 R10: 000000007fffffff R11: 0000000000000000 R12: ffff8880279386c0 R13: ffff888066b8b340 R14: 0000000000000030 R15: 1ffff92004898f50 FS: 0000000000000000(0000) GS:ffff8880976e3000(0063) knlGS:00000000f5436b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00007ffe5e1e1000 CR3: 00000000759a9000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 48 89 fb mov %rdi,%rbx 3: 4c 8d 73 30 lea 0x30(%rbx),%r14 7: 48 83 ec 28 sub $0x28,%rsp b: 48 89 14 24 mov %rdx,(%rsp) f: 48 89 4c 24 08 mov %rcx,0x8(%rsp) 14: e8 36 48 54 ff call 0xff54484f 19: 4c 89 f2 mov %r14,%rdx 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 16 09 00 00 jne 0x94a 34: 48 8b 43 30 mov 0x30(%rbx),%rax 38: 48 85 c0 test %rax,%rax 3b: 0f .byte 0xf 3c: 84 ca test %cl,%dl 3e: 08 00 or %al,(%rax)