Unable to handle kernel paging request at virtual address dfff800000000003
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
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, Xs = 0
[dfff800000000003] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 UID: 0 PID: 6993 Comm: syz.0.15 Not tainted 6.12.0-rc5-syzkaller-00063-g0fc810ae3ae1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : btrfs_root_node+0x88/0x3f4 fs/btrfs/ctree.c:260
lr : rcu_read_lock include/linux/rcupdate.h:850 [inline]
lr : btrfs_root_node+0x88/0x3f4 fs/btrfs/ctree.c:259
sp : ffff80009ebb7400
x29: ffff80009ebb7400 x28: dfff800000000000 x27: 0000000000000001
x26: ffff80008b062fe0 x25: 0000000000000001 x24: ffff800091381000
x23: 0000000000000003 x22: ffff80008b062fa0 x21: ffff800091381000
x20: ffff80008b062880 x19: 0000000000000018 x18: 1fffe00036763a76
x17: ffff80008e78d000 x16: ffff80008aaebcf0 x15: 0000000000000001
x14: ffff80008e790520 x13: dfff800000000000 x12: 00000000f241a5b1
x11: 00000000263887c9 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000cda6dac0 x7 : ffff80008227cd5c x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002
x2 : 0000000000000008 x1 : ffff80008b1641c0 x0 : 0000000000000001
Call trace:
 rcu_read_lock include/linux/rcupdate.h:850 [inline]
 btrfs_root_node+0x88/0x3f4 fs/btrfs/ctree.c:259
 btrfs_read_lock_root_node+0x30/0xf0 fs/btrfs/locking.c:279
 btrfs_build_ref_tree+0xf0/0x125c fs/btrfs/ref-verify.c:1005
 open_ctree+0x18ac/0x21d8 fs/btrfs/disk-io.c:3523
 btrfs_fill_super fs/btrfs/super.c:974 [inline]
 btrfs_get_tree_super fs/btrfs/super.c:1896 [inline]
 btrfs_get_tree+0xdd0/0x1368 fs/btrfs/super.c:2122
 vfs_get_tree+0x90/0x28c fs/super.c:1800
 fc_mount+0x24/0xac fs/namespace.c:1231
 btrfs_get_tree_subvol fs/btrfs/super.c:2085 [inline]
 btrfs_get_tree+0x4e4/0x1368 fs/btrfs/super.c:2123
 vfs_get_tree+0x90/0x28c fs/super.c:1800
 do_new_mount+0x278/0x900 fs/namespace.c:3507
 path_mount+0x590/0xe04 fs/namespace.c:3834
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount fs/namespace.c:4034 [inline]
 __arm64_sys_mount+0x4d4/0x5ac fs/namespace.c:4034
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
Code: 340000f9 9786303a 36000120 978c4998 (387c6ae8) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	340000f9 	cbz	w25, 0x1c
   4:	9786303a 	bl	0xfffffffffe18c0ec
   8:	36000120 	tbz	w0, #0, 0x2c
   c:	978c4998 	bl	0xfffffffffe31266c
* 10:	387c6ae8 	ldrb	w8, [x23, x28] <-- trapping instruction