Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 UID: 0 PID: 112 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x138/0x9d0 fs/jfs/jfs_logmgr.c:935
Code: fe b4 fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 a6 fa e1 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 8a fa e1 fe 49 8b 3f e8 32 fe b4 fe
RSP: 0018:ffffc90002d97b00 EFLAGS: 00010216
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff88801f709e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002d97c08 R08: ffffc90002d97a4f R09: ffffc90002d978e8
R10: dffffc0000000000 R11: fffff520005b2f4a R12: ffff88807b9ff800
R13: dffffc0000000000 R14: ffff88807cb6d238 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff888125d1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3281eff8 CR3: 00000000594df000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 jfs_syncpt+0x7b/0x90 fs/jfs/jfs_logmgr.c:1041
 txEnd+0x2e5/0x530 fs/jfs/jfs_txnmgr.c:549
 txLazyCommit fs/jfs/jfs_txnmgr.c:2684 [inline]
 jfs_lazycommit+0x5ba/0xa90 fs/jfs/jfs_txnmgr.c:2733
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 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:208 [inline]
RIP: 0010:lmLogSync+0x138/0x9d0 fs/jfs/jfs_logmgr.c:935
Code: fe b4 fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 a6 fa e1 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 8a fa e1 fe 49 8b 3f e8 32 fe b4 fe
RSP: 0018:ffffc90002d97b00 EFLAGS: 00010216
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff88801f709e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002d97c08 R08: ffffc90002d97a4f R09: ffffc90002d978e8
R10: dffffc0000000000 R11: fffff520005b2f4a R12: ffff88807b9ff800
R13: dffffc0000000000 R14: ffff88807cb6d238 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff888125c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555575f945c8 CR3: 000000005a73d000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	b4 fe                	mov    $0xfe,%ah
   2:	4d 8d 7e f0          	lea    -0x10(%r14),%r15
   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 a6 fa e1 fe       	call   0xfee1fac1
  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 8a fa e1 fe       	call   0xfee1fac1
  37:	49 8b 3f             	mov    (%r15),%rdi
  3a:	e8 32 fe b4 fe       	call   0xfeb4fe71