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
Oops: general protection fault, probably for non-canonical address 0xdffffc0000008ffd: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x0000000000047fe8-0x0000000000047fef]
CPU: 0 UID: 0 PID: 6442 Comm: syz-executor Not tainted 6.12.0-rc5-syzkaller-g6c52d4da1c74 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:gen_poly_key.isra.0+0x10d/0x330 fs/bcachefs/checksum.c:200
Code: 00 00 00 00 05 00 00 00 80 89 44 24 0c e8 0b cc ed fd 49 8d bd e8 7f 04 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ce 01 00 00 4c 89 fa 4d 8b 8d e8 7f 04 00 48 b8
RSP: 0018:ffffc9000410edf8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 1ffff92000821dc1 RCX: 0000000000000000
RDX: 0000000000008ffd RSI: 0000000000000000 RDI: 0000000000047fe8
RBP: ffffc9000410eed0 R08: 0000000000000001 R09: 0000000000000000
R10: ffffc9000410ee48 R11: 0000000000000000 R12: ffffc9000410ee48
R13: 0000000000000000 R14: ffffc9000410efd8 R15: ffffc9000410ee34
FS:  00007f7538fff6c0(0000) GS:ffff88806a600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f75311ff000 CR3: 0000000046c4c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_checksum+0x1f9/0x2e0 fs/bcachefs/checksum.c:236
 read_one_super+0x530/0x14e0 fs/bcachefs/super-io.c:680
 __bch2_read_super+0xac8/0x10d0 fs/bcachefs/super-io.c:807
 bch2_fs_open+0x2d0/0x10d0 fs/bcachefs/super.c:2032
 bch2_fs_get_tree+0x1004/0x16f0 fs/bcachefs/fs.c:2157
 vfs_get_tree+0x8f/0x380 fs/super.c:1800
 do_new_mount fs/namespace.c:3507 [inline]
 path_mount+0x14e6/0x1f20 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]
 __x64_sys_mount+0x294/0x320 fs/namespace.c:4034
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f753947e5ea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7538ffeef8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f7538ffef80 RCX: 00007f753947e5ea
RDX: 0000000020005d80 RSI: 0000000020005dc0 RDI: 00007f7538ffef40
RBP: 0000000020005d80 R08: 00007f7538ffef80 R09: 0000000000000480
R10: 0000000000000480 R11: 0000000000000246 R12: 0000000020005dc0
R13: 00007f7538ffef40 R14: 0000000000005da1 R15: 0000000020005e00
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:gen_poly_key.isra.0+0x10d/0x330 fs/bcachefs/checksum.c:200
Code: 00 00 00 00 05 00 00 00 80 89 44 24 0c e8 0b cc ed fd 49 8d bd e8 7f 04 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ce 01 00 00 4c 89 fa 4d 8b 8d e8 7f 04 00 48 b8
RSP: 0018:ffffc9000410edf8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 1ffff92000821dc1 RCX: 0000000000000000
RDX: 0000000000008ffd RSI: 0000000000000000 RDI: 0000000000047fe8
RBP: ffffc9000410eed0 R08: 0000000000000001 R09: 0000000000000000
R10: ffffc9000410ee48 R11: 0000000000000000 R12: ffffc9000410ee48
R13: 0000000000000000 R14: ffffc9000410efd8 R15: ffffc9000410ee34
FS:  00007f7538fff6c0(0000) GS:ffff88806a700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f35a7e4e000 CR3: 0000000046c4c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	05 00 00 00 80       	add    $0x80000000,%eax
   9:	89 44 24 0c          	mov    %eax,0xc(%rsp)
   d:	e8 0b cc ed fd       	call   0xfdedcc1d
  12:	49 8d bd e8 7f 04 00 	lea    0x47fe8(%r13),%rdi
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 ce 01 00 00    	jne    0x202
  34:	4c 89 fa             	mov    %r15,%rdx
  37:	4d 8b 8d e8 7f 04 00 	mov    0x47fe8(%r13),%r9
  3e:	48                   	rex.W
  3f:	b8                   	.byte 0xb8