BTRFS info (device loop3 state MC): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1)
BTRFS info (device loop3 state MC): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2)
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: 7649 Comm: syz.3.200 Not tainted 6.11.0-rc7-syzkaller-g5f5673607153 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : backup_super_roots fs/btrfs/disk-io.c:1691 [inline]
pc : write_all_supers+0x9a0/0x38d0 fs/btrfs/disk-io.c:4041
lr : lowmem_page_address include/linux/mm.h:2262 [inline]
lr : folio_address include/linux/mm.h:2273 [inline]
lr : btrfs_header_level fs/btrfs/accessors.h:688 [inline]
lr : backup_super_roots fs/btrfs/disk-io.c:1689 [inline]
lr : write_all_supers+0x8e0/0x38d0 fs/btrfs/disk-io.c:4041
sp : ffff8000a35d6ea0
x29: ffff8000a35d7240 x28: ffff0000c74f6b2b x27: dfff800000000000
x26: 0000000000000003 x25: ffff0000c74f6bc5 x24: ffff0000d81186a8
x23: 0000000000000000 x22: 0000000000000009 x21: dfff800000000000
x20: dfff800000000000 x19: 0000000000000018 x18: ffff8000a35d6a80
x17: 00000000000335a9 x16: ffff80008029c560 x15: 0000000000000001
x14: 1fffe0001b02300d x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000001 x10: 1fffe000184f7d68 x9 : 0000000000000000
x8 : 0000000000000000 x7 : ffff80008223e800 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800080361120
x2 : 0000000000000001 x1 : 0000000000000000 x0 : ffff0000c27bec60
Call trace:
 backup_super_roots fs/btrfs/disk-io.c:1691 [inline]
 write_all_supers+0x9a0/0x38d0 fs/btrfs/disk-io.c:4041
 btrfs_commit_transaction+0x1af0/0x2ba4 fs/btrfs/transaction.c:2530
 btrfs_delete_free_space_tree+0x30c/0x670 fs/btrfs/free-space-tree.c:1312
 btrfs_start_pre_rw_mount+0xba0/0xef4 fs/btrfs/disk-io.c:3012
 btrfs_remount_rw fs/btrfs/super.c:1309 [inline]
 btrfs_reconfigure+0x8e4/0x23d4 fs/btrfs/super.c:1534
 btrfs_reconfigure_for_mount fs/btrfs/super.c:2020 [inline]
 btrfs_get_tree_subvol fs/btrfs/super.c:2079 [inline]
 btrfs_get_tree+0x74c/0x1368 fs/btrfs/super.c:2115
 vfs_get_tree+0x90/0x28c fs/super.c:1800
 do_new_mount+0x278/0x900 fs/namespace.c:3472
 path_mount+0x590/0xe04 fs/namespace.c:3799
 do_mount fs/namespace.c:3812 [inline]
 __do_sys_mount fs/namespace.c:4020 [inline]
 __se_sys_mount fs/namespace.c:3997 [inline]
 __arm64_sys_mount+0x45c/0x5a8 fs/namespace.c:3997
 __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: d2d00014 f2fbfff4 91006113 d343fe7a (38756b48) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	d2d00014 	mov	x20, #0x800000000000        	// #140737488355328
   4:	f2fbfff4 	movk	x20, #0xdfff, lsl #48
   8:	91006113 	add	x19, x8, #0x18
   c:	d343fe7a 	lsr	x26, x19, #3
* 10:	38756b48 	ldrb	w8, [x26, x21] <-- trapping instruction