Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 8245 Comm: syz.0.761 Not tainted 6.16.0-rc4-syzkaller-00308-ga79a588fc176 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:metapage_write_folio+0xa1/0xca0 fs/jfs/jfs_metapage.c:428
Code: 7c 24 18 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 b7 0b 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5c 24 18 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 ba 0b 00 00 48 8b 03 48 89 04 24 48 83 c0 28 48
RSP: 0018:ffffc900031d7408 EFLAGS: 00010256
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000b96a000
RDX: 0000000000000000 RSI: ffffffff83481de5 RDI: ffffea000159cd18
RBP: 1ffff9200063aea0 R08: 0000000000000001 R09: fffff940002b39a6
R10: ffffea000159cd37 R11: 0000000000000001 R12: ffffea000159cd00
R13: ffffc900031d7520 R14: 1ffff9200063ae8d R15: ffffea000159cd34
FS:  00007f0cf50cb6c0(0000) GS:ffff88812471c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa8e73af640 CR3: 0000000045f8b000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 metapage_write_one+0x229/0x3f0 fs/jfs/jfs_metapage.c:816
 force_metapage+0x187/0x330 fs/jfs/jfs_metapage.c:838
 txForce fs/jfs/jfs_txnmgr.c:2215 [inline]
 txCommit+0x2c23/0x4d40 fs/jfs/jfs_txnmgr.c:1315
 duplicateIXtree fs/jfs/jfs_imap.c:3019 [inline]
 diNewIAG fs/jfs/jfs_imap.c:2597 [inline]
 diAllocExt fs/jfs/jfs_imap.c:1905 [inline]
 diAllocAG+0x111c/0x2340 fs/jfs/jfs_imap.c:1669
 diAlloc+0x859/0x1a80 fs/jfs/jfs_imap.c:1590
 ialloc+0x84/0x9e0 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x24b/0xba0 fs/jfs/namei.c:225
 vfs_mkdir+0x593/0x8c0 fs/namei.c:4375
 do_mkdirat+0x304/0x3e0 fs/namei.c:4408
 __do_sys_mkdirat fs/namei.c:4425 [inline]
 __se_sys_mkdirat fs/namei.c:4423 [inline]
 __x64_sys_mkdirat+0x83/0xb0 fs/namei.c:4423
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0cf418e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f0cf50cb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f0cf43b5fa0 RCX: 00007f0cf418e929
RDX: 0000000000000000 RSI: 0000200000000840 RDI: ffffffffffffff9c
RBP: 00007f0cf4210b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0cf43b5fa0 R15: 00007fff2b827958
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:metapage_write_folio+0xa1/0xca0 fs/jfs/jfs_metapage.c:428
Code: 7c 24 18 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 b7 0b 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5c 24 18 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 ba 0b 00 00 48 8b 03 48 89 04 24 48 83 c0 28 48
RSP: 0018:ffffc900031d7408 EFLAGS: 00010256
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000b96a000
RDX: 0000000000000000 RSI: ffffffff83481de5 RDI: ffffea000159cd18
RBP: 1ffff9200063aea0 R08: 0000000000000001 R09: fffff940002b39a6
R10: ffffea000159cd37 R11: 0000000000000001 R12: ffffea000159cd00
R13: ffffc900031d7520 R14: 1ffff9200063ae8d R15: ffffea000159cd34
FS:  00007f0cf50cb6c0(0000) GS:ffff88812471c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f421f203368 CR3: 0000000045f8b000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	7c 24                	jl     0x26
   2:	18 48 89             	sbb    %cl,-0x77(%rax)
   5:	f8                   	clc
   6:	48 c1 e8 03          	shr    $0x3,%rax
   a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
   e:	0f 85 b7 0b 00 00    	jne    0xbcb
  14:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1b:	fc ff df
  1e:	49 8b 5c 24 18       	mov    0x18(%r12),%rbx
  23:	48 89 da             	mov    %rbx,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 ba 0b 00 00    	jne    0xbee
  34:	48 8b 03             	mov    (%rbx),%rax
  37:	48 89 04 24          	mov    %rax,(%rsp)
  3b:	48 83 c0 28          	add    $0x28,%rax
  3f:	48                   	rex.W