general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 0 PID: 112 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x14f/0x9d0 fs/jfs/jfs_logmgr.c:935
Code: c6 ae fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 0f 52 d9 fe 4d 8b 3f 49 83 c7 40 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 f3 51 d9 fe 49 8b 3f e8 1b c6 ae fe
RSP: 0018:ffffc90002607c40 EFLAGS: 00010202
RAX: 0000000000000008 RBX: dffffc0000000000 RCX: 8c2ad4de03fbe600
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002607d48 R08: 0000000000000004 R09: 0000000000000004
R10: ffffc90002607b64 R11: fffff520004c0f75 R12: 0000000000000001
R13: ffff88805b707800 R14: ffff888026178c38 R15: 0000000000000040
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d923ffc CR3: 0000000057312000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 jfs_syncpt+0x7b/0x90 fs/jfs/jfs_logmgr.c:1041
 txEnd+0x2e5/0x520 fs/jfs/jfs_txnmgr.c:550
 txLazyCommit fs/jfs/jfs_txnmgr.c:2685 [inline]
 jfs_lazycommit+0x5c3/0xaa0 fs/jfs/jfs_txnmgr.c:2733
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x14f/0x9d0 fs/jfs/jfs_logmgr.c:935
Code: c6 ae fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 0f 52 d9 fe 4d 8b 3f 49 83 c7 40 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 f3 51 d9 fe 49 8b 3f e8 1b c6 ae fe
RSP: 0018:ffffc90002607c40 EFLAGS: 00010202
RAX: 0000000000000008 RBX: dffffc0000000000 RCX: 8c2ad4de03fbe600
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002607d48 R08: 0000000000000004 R09: 0000000000000004
R10: ffffc90002607b64 R11: fffff520004c0f75 R12: 0000000000000001
R13: ffff88805b707800 R14: ffff888026178c38 R15: 0000000000000040
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe46efea2f8 CR3: 0000000030768000 CR4: 00000000003506e0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	ae                   	scas   %es:(%rdi),%al
   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 0f 52 d9 fe       	call   0xfed9522a
  1b:	4d 8b 3f             	mov    (%r15),%r15
  1e:	49 83 c7 40          	add    $0x40,%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 f3 51 d9 fe       	call   0xfed9522a
  37:	49 8b 3f             	mov    (%r15),%rdi
  3a:	e8 1b c6 ae fe       	call   0xfeaec65a