loop0: detected capacity change from 0 to 32768
bcachefs (/dev/loop0): error reading default superblock: checksum error, type crc32c_nonzero: got 1ef4af3a should be 29d2fb78
Unable to handle kernel paging request at virtual address dfff800000008ff5
KASAN: probably user-memory-access in range [0x0000000000047fa8-0x0000000000047faf]
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
[dfff800000008ff5] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 UID: 0 PID: 6391 Comm: syz-executor284 Not tainted 6.11.0-rc4-syzkaller-gbe6d853c7631 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : gen_poly_key fs/bcachefs/checksum.c:192 [inline]
pc : bch2_checksum+0x198/0x784 fs/bcachefs/checksum.c:228
lr : gen_poly_key fs/bcachefs/checksum.c:191 [inline]
lr : bch2_checksum+0x194/0x784 fs/bcachefs/checksum.c:228
sp : ffff80009a3b6900
x29: ffff80009a3b6c40 x28: 0000000000047fa8 x27: 0000000000000000
x26: 0000000000000000 x25: ffff80009a3b6960 x24: dfff800000000000
x23: ffff80009a3b6a40 x22: 0000000000000003 x21: ffff700013476d28
x20: ffff80009a3b6c00 x19: ffff80009a3b69a0 x18: 1fffe00036799fe6
x17: ffff80008f50d000 x16: ffff80008b22dc80 x15: 0000000000000004
x14: 1ffff00013476d2c x13: 0000000000000000 x12: 0000000000000000
x11: ffff700013476d30 x10: 1ffff00013476d2f x9 : dfff800000000000
x8 : 0000000000008ff5 x7 : 0000000000000000 x6 : 000000000000003f
x5 : 0000000000000040 x4 : 0000000000000000 x3 : 0000000000000020
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff80009a3b6960
Call trace:
 gen_poly_key fs/bcachefs/checksum.c:192 [inline]
 bch2_checksum+0x198/0x784 fs/bcachefs/checksum.c:228
 read_one_super+0xba0/0x2310 fs/bcachefs/super-io.c:677
 __bch2_read_super+0xbf4/0x102c fs/bcachefs/super-io.c:802
 bch2_read_super+0x38/0x4c fs/bcachefs/super-io.c:847
 bch2_fs_open+0x1e0/0xb64 fs/bcachefs/super.c:2083
 bch2_fs_get_tree+0x53c/0x1030 fs/bcachefs/fs.c:1933
 vfs_get_tree+0x90/0x288 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: 2a1f03e1 52800402 9789220f d343ff88 (38786908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	2a1f03e1 	mov	w1, wzr
   4:	52800402 	mov	w2, #0x20                  	// #32
   8:	9789220f 	bl	0xfffffffffe248844
   c:	d343ff88 	lsr	x8, x28, #3
* 10:	38786908 	ldrb	w8, [x8, x24] <-- trapping instruction