syz.0.15[3278]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
loop0: detected capacity change from 0 to 32768
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 80000001077f7067 P4D 80000001077f7067 PUD 105f77067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 1 PID: 3278 Comm: syz.0.15 Not tainted 6.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:strlen+0xb/0x20 lib/string.c:418
Code: 5b 41 5e 41 5f c3 cc cc cc cc 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 c7 c0 ff ff ff ff <80> 7c 07 01 00 48 8d 40 01 75 f5 c3 cc cc cc cc 0f 1f 44 00 00 90
RSP: 0018:ffffc90002c9f940 EFLAGS: 00010246
RAX: ffffffffffffffff RBX: ffffffff82e7f1b0 RCX: 0000000000000071
RDX: 0000000000000016 RSI: ffffffff82e7ea50 RDI: 0000000000000000
RBP: 0000000000000002 R08: ffff0a00ffffff00 R09: ffff888101f6a870
R10: 0000000000000000 R11: 0000000400000000 R12: ffffc90002c9f990
R13: ffff888107b00000 R14: 0000000000000003 R15: 0000000000000000
FS:  00007fc1964366c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000105b08000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 prt_str fs/bcachefs/printbuf.h:232 [inline]
 bch2_opt_to_text+0x88/0x210 fs/bcachefs/opts.c:393
 print_mount_opts+0x2cd/0x540 fs/bcachefs/super.c:918
 bch2_fs_start+0x33/0x3e0 fs/bcachefs/super.c:933
 bch2_fs_open+0xe38/0x1470 fs/bcachefs/super.c:1948
 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: 0033:0x7fc19557f69a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 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:00007fc196435e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fc196435ef0 RCX: 00007fc19557f69a
RDX: 00000000200058c0 RSI: 0000000020005900 RDI: 00007fc196435eb0
RBP: 00000000200058c0 R08: 00007fc196435ef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020005900
R13: 00007fc196435eb0 R14: 000000000000593a R15: 0000000020001e80
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:strlen+0xb/0x20 lib/string.c:418
Code: 5b 41 5e 41 5f c3 cc cc cc cc 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 c7 c0 ff ff ff ff <80> 7c 07 01 00 48 8d 40 01 75 f5 c3 cc cc cc cc 0f 1f 44 00 00 90
RSP: 0018:ffffc90002c9f940 EFLAGS: 00010246
RAX: ffffffffffffffff RBX: ffffffff82e7f1b0 RCX: 0000000000000071
RDX: 0000000000000016 RSI: ffffffff82e7ea50 RDI: 0000000000000000
RBP: 0000000000000002 R08: ffff0a00ffffff00 R09: ffff888101f6a870
R10: 0000000000000000 R11: 0000000400000000 R12: ffffc90002c9f990
R13: ffff888107b00000 R14: 0000000000000003 R15: 0000000000000000
FS:  00007fc1964366c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000105b08000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	5b                   	pop    %rbx
   1:	41 5e                	pop    %r14
   3:	41 5f                	pop    %r15
   5:	c3                   	ret
   6:	cc                   	int3
   7:	cc                   	int3
   8:	cc                   	int3
   9:	cc                   	int3
   a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	f3 0f 1e fa          	endbr64
  23:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
* 2a:	80 7c 07 01 00       	cmpb   $0x0,0x1(%rdi,%rax,1) <-- trapping instruction
  2f:	48 8d 40 01          	lea    0x1(%rax),%rax
  33:	75 f5                	jne    0x2a
  35:	c3                   	ret
  36:	cc                   	int3
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3f:	90                   	nop