Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 UID: 0 PID: 111 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline]
RIP: 0010:lmLogSync+0xfb/0x9d0 fs/jfs/jfs_logmgr.c:935
Code: 6b 79 fe 4d 8d 7e d8 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 a3 2d df fe 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 87 2d df fe 49 8b 3f e8 4f 14 b1 fe
RSP: 0018:ffffc900026f7ae0 EFLAGS: 00010216
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff88801f780000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900026f7be8 R08: 0000000000000003 R09: ffffc900026f7b40
R10: dffffc0000000000 R11: fffff520004def6c R12: ffff88805478f800
R13: dffffc0000000000 R14: ffff888078a0f438 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff88812613b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f922ff8 CR3: 000000003096d000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 jfs_syncpt+0x7b/0x90 fs/jfs/jfs_logmgr.c:1041
 txEnd+0x2e5/0x530 fs/jfs/jfs_txnmgr.c:550
 txLazyCommit fs/jfs/jfs_txnmgr.c:2685 [inline]
 jfs_lazycommit+0x5ba/0xa90 fs/jfs/jfs_txnmgr.c:2734
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline]
RIP: 0010:lmLogSync+0xfb/0x9d0 fs/jfs/jfs_logmgr.c:935
Code: 6b 79 fe 4d 8d 7e d8 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 a3 2d df fe 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 87 2d df fe 49 8b 3f e8 4f 14 b1 fe
RSP: 0018:ffffc900026f7ae0 EFLAGS: 00010216
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff88801f780000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900026f7be8 R08: 0000000000000003 R09: ffffc900026f7b40
R10: dffffc0000000000 R11: fffff520004def6c R12: ffff88805478f800
R13: dffffc0000000000 R14: ffff888078a0f438 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff88812613b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2b583a CR3: 000000003096d000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	6b 79 fe 4d          	imul   $0x4d,-0x2(%rcx),%edi
   4:	8d 7e d8             	lea    -0x28(%rsi),%edi
   7:	4c 89 f8             	mov    %r15,%rax
   a:	48 c1 e8 03          	shr    $0x3,%rax
   e:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  12:	74 08                	je     0x1c
  14:	4c 89 ff             	mov    %r15,%rdi
  17:	e8 a3 2d df fe       	call   0xfedf2dbf
  1c:	4d 8b 3f             	mov    (%r15),%r15
  1f:	49 83 c7 30          	add    $0x30,%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 ff             	mov    %r15,%rdi
  33:	e8 87 2d df fe       	call   0xfedf2dbf
  38:	49 8b 3f             	mov    (%r15),%rdi
  3b:	e8 4f 14 b1 fe       	call   0xfeb1148f