syzbot

Unable to handle kernel paging request at virtual address dfff80000000000b
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006
  CM = 0, WnR = 0
[dfff80000000000b] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4244 Comm: syz-executor Not tainted 5.15.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : klist_put lib/klist.c:212 [inline]
pc : klist_del lib/klist.c:230 [inline]
pc : klist_remove+0x12c/0x2f8 lib/klist.c:249
lr : spin_unlock include/linux/spinlock.h:403 [inline]
lr : klist_remove+0x108/0x2f8 lib/klist.c:247
sp : ffff80001f8f7780
x29: ffff80001f8f7810 x28: ffff0000e6ce11f0 x27: 1fffe0001b594cc9
x26: dfff800000000000 x25: ffff0000e4eb1b40 x24: dfff800000000000
x23: ffff700003f1eef0 x22: ffff800014927d00 x21: 1fffe00019f1da0c
x20: 0000000000000000 x19: ffff0000cf8ed060 x18: 0000000000000000
x17: ffff800016ce0000 x16: ffff8000082d4b24 x15: ffff8000167c04c0
x14: ffff0000e4eb2540 x13: dfff800000000000 x12: 0000000000000001
x11: 1ffff00002924fa4 x10: 0000000000000001 x9 : 0000000000000000
x8 : 000000000000000b x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff80001706d950 x4 : 0000000000000008 x3 : ffff8000082d4c38
x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000058
Call trace:
 klist_put lib/klist.c:212 [inline]
 klist_del lib/klist.c:230 [inline]
 klist_remove+0x12c/0x2f8 lib/klist.c:249
 device_move+0x16c/0x5b0 drivers/base/core.c:4338
 hci_conn_del_sysfs+0x9c/0x150 net/bluetooth/hci_sysfs.c:73
 hci_conn_cleanup+0x424/0x5b8 net/bluetooth/hci_conn.c:140
 hci_conn_del+0x238/0x378 net/bluetooth/hci_conn.c:678
 hci_conn_hash_flush+0x17c/0x214 net/bluetooth/hci_conn.c:1623
 hci_dev_do_close+0x7e4/0x105c net/bluetooth/hci_core.c:1795
 hci_unregister_dev+0x23c/0x4c0 net/bluetooth/hci_core.c:4040
 vhci_release+0x74/0xc4 drivers/bluetooth/hci_vhci.c:345
 __fput+0x1c0/0x7f8 fs/file_table.c:311
 ____fput+0x20/0x30 fs/file_table.c:339
 task_work_run+0x12c/0x1e0 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0x67c/0x1f58 kernel/exit.c:874
 do_group_exit+0x100/0x268 kernel/exit.c:996
 __do_sys_exit_group kernel/exit.c:1007 [inline]
 __se_sys_exit_group kernel/exit.c:1005 [inline]
 __wake_up_parent+0x0/0x60 kernel/exit.c:1005
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: f9400268 927ff914 91016280 d343fc08 (38786908) 
---[ end trace 535750795ee3d3a7 ]---
----------------
Code disassembly (best guess):
   0:	f9400268 	ldr	x8, [x19]
   4:	927ff914 	and	x20, x8, #0xfffffffffffffffe
   8:	91016280 	add	x0, x20, #0x58
   c:	d343fc08 	lsr	x8, x0, #3
* 10:	38786908 	ldrb	w8, [x8, x24] <-- trapping instruction