Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 12490 Comm: syz.8.1789 Not tainted 6.15.0-rc7-syzkaller-00144-gb1427432d3b6 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:metapage_write_folio+0xa8/0xca0 fs/jfs/jfs_metapage.c:346
Code: e8 9d ac 83 fe 4d 8d 74 24 18 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 a2 a7 e5 fe 4d 8b 36 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 89 a7 e5 fe 49 8b 1e 4d 8d 74 24
RSP: 0018:ffffc90002ee7340 EFLAGS: 00010256
RAX: 0000000000000000 RBX: 1ffffd400008d0a6 RCX: 0000000000080000
RDX: ffffc900110c0000 RSI: 00000000000015e7 RDI: 00000000000015e8
RBP: ffffc90002ee7450 R08: ffffea0000468537 R09: 1ffffd400008d0a6
R10: dffffc0000000000 R11: fffff9400008d0a7 R12: ffffea0000468500
R13: 0000000000000082 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f4e78db66c0(0000) GS:ffff8881261c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3e9b91 CR3: 0000000063da4000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 metapage_write_one+0x244/0x440 fs/jfs/jfs_metapage.c:710
 force_metapage+0x1a7/0x360 fs/jfs/jfs_metapage.c:732
 txForce fs/jfs/jfs_txnmgr.c:2215 [inline]
 txCommit+0x4c05/0x5430 fs/jfs/jfs_txnmgr.c:1315
 diNewIAG fs/jfs/jfs_imap.c:2592 [inline]
 diAllocExt fs/jfs/jfs_imap.c:1905 [inline]
 diAllocAG+0x1770/0x1df0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1d5/0x1680 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x8f0 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x193/0xa70 fs/jfs/namei.c:225
 vfs_mkdir+0x306/0x510 fs/namei.c:4359
 do_mkdirat+0x247/0x590 fs/namei.c:4392
 __do_sys_mkdirat fs/namei.c:4409 [inline]
 __se_sys_mkdirat fs/namei.c:4407 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4407
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4e77f8d1d7
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 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:00007f4e78db5e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f4e78db5ef0 RCX: 00007f4e77f8d1d7
RDX: 00000000000001ff RSI: 0000200000000240 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000240
R13: 00007f4e78db5eb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:metapage_write_folio+0xa8/0xca0 fs/jfs/jfs_metapage.c:346
Code: e8 9d ac 83 fe 4d 8d 74 24 18 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 a2 a7 e5 fe 4d 8b 36 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 89 a7 e5 fe 49 8b 1e 4d 8d 74 24
RSP: 0018:ffffc90002ee7340 EFLAGS: 00010256
RAX: 0000000000000000 RBX: 1ffffd400008d0a6 RCX: 0000000000080000
RDX: ffffc900110c0000 RSI: 00000000000015e7 RDI: 00000000000015e8
RBP: ffffc90002ee7450 R08: ffffea0000468537 R09: 1ffffd400008d0a6
R10: dffffc0000000000 R11: fffff9400008d0a7 R12: ffffea0000468500
R13: 0000000000000082 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f4e78db66c0(0000) GS:ffff8881260c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3166380178 CR3: 0000000063da4000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	e8 9d ac 83 fe       	call   0xfe83aca2
   5:	4d 8d 74 24 18       	lea    0x18(%r12),%r14
   a:	4c 89 f0             	mov    %r14,%rax
   d:	48 c1 e8 03          	shr    $0x3,%rax
  11:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1)
  16:	74 08                	je     0x20
  18:	4c 89 f7             	mov    %r14,%rdi
  1b:	e8 a2 a7 e5 fe       	call   0xfee5a7c2
  20:	4d 8b 36             	mov    (%r14),%r14
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 f7             	mov    %r14,%rdi
  34:	e8 89 a7 e5 fe       	call   0xfee5a7c2
  39:	49 8b 1e             	mov    (%r14),%rbx
  3c:	4d                   	rex.WRB
  3d:	8d                   	.byte 0x8d
  3e:	74 24                	je     0x64