syz.0.15[3220]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
loop0: detected capacity change from 0 to 32768
BUG: unable to handle page fault for address: 0000000000047988
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 8000000104712067 P4D 8000000104712067 PUD 104f46067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 0 PID: 3220 Comm: syz.0.15 Not tainted 6.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:gen_poly_key fs/bcachefs/checksum.c:190 [inline]
RIP: 0010:bch2_checksum+0x181/0x360 fs/bcachefs/checksum.c:226
Code: 00 00 00 00 00 00 48 c7 84 24 c0 01 00 00 00 00 00 00 48 c7 84 24 b8 01 00 00 00 00 00 00 48 c7 84 24 b0 01 00 00 00 00 00 00 <49> 8b bc 24 88 79 04 00 48 b8 00 00 00 00 00 00 00 80 49 31 c5 48
RSP: 0018:ffffc9000360b570 EFLAGS: 00010246
RAX: ffffc9000360b5a8 RBX: 0000000000000004 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000360b720
RBP: ffffc9000360b778 R08: ffff88810673e010 R09: 0000000000000000
R10: ffffc9000360b5a8 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88810673e010
FS:  00007fbf46c676c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000047988 CR3: 0000000105332000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 read_one_super+0x1af/0x210 fs/bcachefs/super-io.c:645
 bch2_read_super+0x170/0x4a0 fs/bcachefs/super-io.c:715
 bch2_fs_open+0xdb/0x1470 fs/bcachefs/super.c:1897
 bch2_mount+0x273/0x5b0 fs/bcachefs/fs.c:1829
 legacy_get_tree+0x2d/0x60 fs/fs_context.c:638
 vfs_get_tree+0x24/0xb0 fs/super.c:1750
 do_new_mount+0x153/0x390 fs/namespace.c:3335
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount+0x14b/0x1c0 fs/namespace.c:3861
 do_syscall_64+0x46/0xc0
 entry_SYSCALL_64_after_hwframe+0x6f/0xd9
RIP: 0033:0x7fbf45f7711a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 7e 1a 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbf46c66e78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fbf46c66f00 RCX: 00007fbf45f7711a
RDX: 0000000020005b00 RSI: 0000000020000040 RDI: 00007fbf46c66ec0
RBP: 0000000020005b00 R08: 00007fbf46c66f00 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000040
R13: 00007fbf46c66ec0 R14: 0000000000005b54 R15: 0000000020000540
 </TASK>
Modules linked in:
CR2: 0000000000047988
---[ end trace 0000000000000000 ]---
RIP: 0010:gen_poly_key fs/bcachefs/checksum.c:190 [inline]
RIP: 0010:bch2_checksum+0x181/0x360 fs/bcachefs/checksum.c:226
Code: 00 00 00 00 00 00 48 c7 84 24 c0 01 00 00 00 00 00 00 48 c7 84 24 b8 01 00 00 00 00 00 00 48 c7 84 24 b0 01 00 00 00 00 00 00 <49> 8b bc 24 88 79 04 00 48 b8 00 00 00 00 00 00 00 80 49 31 c5 48
RSP: 0018:ffffc9000360b570 EFLAGS: 00010246
RAX: ffffc9000360b5a8 RBX: 0000000000000004 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000360b720
RBP: ffffc9000360b778 R08: ffff88810673e010 R09: 0000000000000000
R10: ffffc9000360b5a8 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88810673e010
FS:  00007fbf46c676c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000047988 CR3: 0000000105332000 CR4: 00000000003506f0
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:	00 00                	add    %al,(%rax)
   6:	48 c7 84 24 c0 01 00 	movq   $0x0,0x1c0(%rsp)
   d:	00 00 00 00 00
  12:	48 c7 84 24 b8 01 00 	movq   $0x0,0x1b8(%rsp)
  19:	00 00 00 00 00
  1e:	48 c7 84 24 b0 01 00 	movq   $0x0,0x1b0(%rsp)
  25:	00 00 00 00 00
* 2a:	49 8b bc 24 88 79 04 	mov    0x47988(%r12),%rdi <-- trapping instruction
  31:	00
  32:	48 b8 00 00 00 00 00 	movabs $0x8000000000000000,%rax
  39:	00 00 80
  3c:	49 31 c5             	xor    %rax,%r13
  3f:	48                   	rex.W