Unable to handle kernel NULL pointer dereference at virtual address 0000000000000400
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0
user pgtable: 4k pages, 48-bit VAs, pgdp=0000000130a12000
[0000000000000400] pgd=0800000141542403, p4d=0800000141542403, pud=0000000000000000
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 1 UID: 0 PID: 8392 Comm: syz.0.758 Tainted: G   M                syzkaller #0 PREEMPT 
Tainted: [M]=MACHINE_CHECK
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : get_freepointer mm/slub.c:564 [inline]
pc : __refill_objects_node+0x308/0x510 mm/slub.c:7292
lr : get_freelist_nofreeze mm/slub.c:4457 [inline]
lr : __refill_objects_node+0x2b8/0x510 mm/slub.c:7288
sp : ffff8000963378d0
x29: ffff800096337960 x28: 0000000000000000 x27: 0000000000000000
x26: 0000000000000004 x25: fffffdffc322ee00 x24: 0000000000000003
x23: 0000000000000004 x22: 0000000000000004 x21: 0000000000000001
x20: ffff0000c1b2f938 x19: 0000000000000004 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000001
x14: 0000000000886339 x13: 0000000000000001 x12: 0000000000000003
x11: 0000000000000000 x10: fffffdffc322ee20 x9 : ffff0000c1b2f920
x8 : 0000000000000400 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000008 x3 : 0000000000080008
x2 : 0000000000000000 x1 : 0000000000080002 x0 : 0000000000000001
Call trace:
 get_freepointer mm/slub.c:563 [inline] (P)
 __refill_objects_node+0x308/0x510 mm/slub.c:7292 (P)
 refill_objects+0x78/0x320 mm/slub.c:7405
 refill_sheaf+0x44/0x6c mm/slub.c:2885
 __pcs_replace_empty_main+0x22c/0x4f4 mm/slub.c:4774
 alloc_from_pcs mm/slub.c:4850 [inline]
 slab_alloc_node mm/slub.c:4984 [inline]
 __kmalloc_cache_noprof+0x37c/0x5fc mm/slub.c:5559
 _kmalloc_noprof include/linux/slab.h:991 [inline]
 _kzalloc_noprof include/linux/slab.h:1312 [inline]
 l2cap_chan_create+0x58/0x6ec net/bluetooth/l2cap_core.c:447
 l2cap_sock_create+0x128/0x2d0 net/bluetooth/l2cap_sock.c:2063
 bt_sock_create+0x14c/0x240 net/bluetooth/af_bluetooth.c:132
 __sock_create+0x31c/0x670 net/socket.c:1676
 sock_create net/socket.c:1734 [inline]
 __sys_socket_create+0xc0/0x11c net/socket.c:1771
 __sys_socket+0x44/0xec net/socket.c:1818
 __do_sys_socket net/socket.c:1832 [inline]
 __se_sys_socket net/socket.c:1830 [inline]
 __arm64_sys_socket+0x84/0x9c net/socket.c:1830
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796
 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606
Code: f9401fe8 f900029b 2a1a03f7 b9402908 (f87b691c) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	f9401fe8 	ldr	x8, [sp, #56]
   4:	f900029b 	str	x27, [x20]
   8:	2a1a03f7 	mov	w23, w26
   c:	b9402908 	ldr	w8, [x8, #40]
* 10:	f87b691c 	ldr	x28, [x8, x27] <-- trapping instruction