Oops: stack segment: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 13449 Comm: syz-executor Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:kernfs_rename_ns+0x3a/0x7a0 fs/kernfs/dir.c:1750 Code: ec 48 48 89 cb 48 89 54 24 10 49 89 f5 49 89 fe 49 bc 00 00 00 00 00 fc ff df e8 41 83 5c ff 4d 8d 7e 30 4c 89 fd 48 c1 ed 03 <42> 80 7c 25 00 00 74 08 4c 89 ff e8 a6 2b c3 ff 49 83 3f 00 0f 84 RSP: 0018:ffffc9000ba6f5a0 EFLAGS: 00010206 RAX: ffffffff8265351f RBX: 0000000000000000 RCX: ffff888057628000 RDX: 0000000000000000 RSI: ffff8881422d9a50 RDI: 0000000000000000 RBP: 0000000000000006 R08: ffff888057628000 R09: 0000000000000008 R10: 0000000000000007 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8881422d9a50 R14: 0000000000000000 R15: 0000000000000030 FS: 0000000000000000(0000) GS:ffff888125d25000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3db1f15000 CR3: 000000003ffd8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000001800 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: kobject_move+0x525/0x6e0 lib/kobject.c:569 device_move+0xe0/0x730 drivers/base/core.c:4606 hci_conn_del_sysfs+0xb8/0x1a0 net/bluetooth/hci_sysfs.c:75 hci_conn_cleanup net/bluetooth/hci_conn.c:173 [inline] hci_conn_del+0xc36/0x1240 net/bluetooth/hci_conn.c:1240 hci_conn_hash_flush+0x191/0x260 net/bluetooth/hci_conn.c:2644 hci_dev_close_sync+0x821/0x1100 net/bluetooth/hci_sync.c:5341 hci_dev_do_close net/bluetooth/hci_core.c:501 [inline] hci_unregister_dev+0x21a/0x5b0 net/bluetooth/hci_core.c:2715 vhci_release+0x152/0x1a0 drivers/bluetooth/hci_vhci.c:690 __fput+0x44c/0xa70 fs/file_table.c:468 task_work_run+0x1d4/0x260 kernel/task_work.c:233 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x8bd/0x25b0 kernel/exit.c:971 do_group_exit+0x21c/0x2d0 kernel/exit.c:1112 get_signal+0x1285/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline] exit_to_user_mode_loop+0x87/0x4f0 kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline] do_syscall_64+0x2d0/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4099d9163a Code: Unable to access opcode bytes at 0x7f4099d91610. RSP: 002b:00007ffcfb4b9ec8 EFLAGS: 00000202 ORIG_RAX: 0000000000000036 RAX: 0000000000000000 RBX: 00007ffcfb4b9f50 RCX: 00007f4099d9163a RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00000000000002d8 R09: 0079746972756365 R10: 00007f4099fb99c0 R11: 0000000000000202 R12: 00007f4099fb9960 R13: 00007ffcfb4b9eec R14: 0000000000000000 R15: 00007f4099fba020 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kernfs_rename_ns+0x3a/0x7a0 fs/kernfs/dir.c:1750 Code: ec 48 48 89 cb 48 89 54 24 10 49 89 f5 49 89 fe 49 bc 00 00 00 00 00 fc ff df e8 41 83 5c ff 4d 8d 7e 30 4c 89 fd 48 c1 ed 03 <42> 80 7c 25 00 00 74 08 4c 89 ff e8 a6 2b c3 ff 49 83 3f 00 0f 84 RSP: 0018:ffffc9000ba6f5a0 EFLAGS: 00010206 RAX: ffffffff8265351f RBX: 0000000000000000 RCX: ffff888057628000 RDX: 0000000000000000 RSI: ffff8881422d9a50 RDI: 0000000000000000 RBP: 0000000000000006 R08: ffff888057628000 R09: 0000000000000008 R10: 0000000000000007 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8881422d9a50 R14: 0000000000000000 R15: 0000000000000030 FS: 0000000000000000(0000) GS:ffff888125c25000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b163464f40 CR3: 000000000df38000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000041391c33 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: ec in (%dx),%al 1: 48 rex.W 2: 48 89 cb mov %rcx,%rbx 5: 48 89 54 24 10 mov %rdx,0x10(%rsp) a: 49 89 f5 mov %rsi,%r13 d: 49 89 fe mov %rdi,%r14 10: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 17: fc ff df 1a: e8 41 83 5c ff call 0xff5c8360 1f: 4d 8d 7e 30 lea 0x30(%r14),%r15 23: 4c 89 fd mov %r15,%rbp 26: 48 c1 ed 03 shr $0x3,%rbp * 2a: 42 80 7c 25 00 00 cmpb $0x0,0x0(%rbp,%r12,1) <-- trapping instruction 30: 74 08 je 0x3a 32: 4c 89 ff mov %r15,%rdi 35: e8 a6 2b c3 ff call 0xffc32be0 3a: 49 83 3f 00 cmpq $0x0,(%r15) 3e: 0f .byte 0xf 3f: 84 .byte 0x84