general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 PID: 278 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x137/0x9e0 fs/jfs/jfs_logmgr.c:943
Code: 69 cc fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 f7 74 ec 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 db 74 ec fe 49 8b 3f e8 a3 69 cc fe
RSP: 0018:ffffc90002e2fc60 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: cd5d12b924b49700
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002e2fd68 R08: ffffc90002e2fbdf R09: ffffc90002e2fba4
R10: dffffc0000000000 R11: fffff520005c5f7c R12: 1ffff920004f02d1
R13: ffff888076b16000 R14: ffff8880780a1a38 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff520171a0 CR3: 000000005f9ca000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_syncpt+0x77/0x90 fs/jfs/jfs_logmgr.c:1049
 txEnd+0x2e1/0x520 fs/jfs/jfs_txnmgr.c:550
 txLazyCommit fs/jfs/jfs_txnmgr.c:2719 [inline]
 jfs_lazycommit+0x5b8/0xb40 fs/jfs/jfs_txnmgr.c:2767
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Modules linked in:
---[ end trace 0d9302fcba065c28 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x137/0x9e0 fs/jfs/jfs_logmgr.c:943
Code: 69 cc fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 f7 74 ec 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 db 74 ec fe 49 8b 3f e8 a3 69 cc fe
RSP: 0018:ffffc90002e2fc60 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: cd5d12b924b49700
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002e2fd68 R08: ffffc90002e2fbdf R09: ffffc90002e2fba4
R10: dffffc0000000000 R11: fffff520005c5f7c R12: 1ffff920004f02d1
R13: ffff888076b16000 R14: ffff8880780a1a38 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0bb24907e8 CR3: 000000000c08e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	69 cc fe 4d 8d 7e    	imul   $0x7e8d4dfe,%esp,%ecx
   6:	f0 4c 89 f8          	lock 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 f7 74 ec fe       	call   0xfeec7513
  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 db 74 ec fe       	call   0xfeec7513
  38:	49 8b 3f             	mov    (%r15),%rdi
  3b:	e8 a3 69 cc fe       	call   0xfecc69e3