general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 PID: 275 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x137/0x9d0 fs/jfs/jfs_logmgr.c:943
Code: 9a cc fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 f7 be 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 be ec fe 49 8b 3f e8 e3 99 cc fe
RSP: 0018:ffffc90002cefc60 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: dca9b621eab18600
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002cefd68 R08: ffffc90002cefbdf R09: ffffc90002cefba4
R10: dffffc0000000000 R11: fffff5200059df7c R12: 1ffff920004c8227
R13: ffff888077cb2000 R14: ffff88807c47cc38 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb5dee70ff8 CR3: 0000000063a66000 CR4: 00000000003506f0
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+0x5cf/0xb60 fs/jfs/jfs_txnmgr.c:2767
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Modules linked in:
---[ end trace d78f0f21b3bb30d4 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x137/0x9d0 fs/jfs/jfs_logmgr.c:943
Code: 9a cc fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 f7 be 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 be ec fe 49 8b 3f e8 e3 99 cc fe
RSP: 0018:ffffc90002cefc60 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: dca9b621eab18600
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002cefd68 R08: ffffc90002cefbdf R09: ffffc90002cefba4
R10: dffffc0000000000 R11: fffff5200059df7c R12: 1ffff920004c8227
R13: ffff888077cb2000 R14: ffff88807c47cc38 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0648e5c000 CR3: 000000007aa3c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	cc                   	int3
   1:	fe 4d 8d             	decb   -0x73(%rbp)
   4:	7e f0                	jle    0xfffffff6
   6:	4c 89 f8             	mov    %r15,%rax
   9:	48 c1 e8 03          	shr    $0x3,%rax
   d:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  11:	74 08                	je     0x1b
  13:	4c 89 ff             	mov    %r15,%rdi
  16:	e8 f7 be ec fe       	call   0xfeecbf12
  1b:	4d 8b 3f             	mov    (%r15),%r15
  1e:	49 83 c7 30          	add    $0x30,%r15
  22:	4c 89 f8             	mov    %r15,%rax
  25:	48 c1 e8 03          	shr    $0x3,%rax
* 29:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2d:	74 08                	je     0x37
  2f:	4c 89 ff             	mov    %r15,%rdi
  32:	e8 db be ec fe       	call   0xfeecbf12
  37:	49 8b 3f             	mov    (%r15),%rdi
  3a:	e8 e3 99 cc fe       	call   0xfecc9a22