Oops: general protection fault, probably for non-canonical address 0xdffffc000000002f: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000178-0x000000000000017f]
CPU: 1 UID: 0 PID: 120 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:txEnd+0x1c0/0x530 fs/jfs/jfs_txnmgr.c:540
Code: 43 0f b6 04 2c 84 c0 0f 85 d8 02 00 00 66 41 89 2e 0f b7 44 24 04 89 05 4e 09 96 15 4c 8d b3 7c 01 00 00 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 cb 02 00 00 45 8b 3e 41 8d 77 ff 41 89
RSP: 0018:ffffc900039f7c00 EFLAGS: 00010203
RAX: 000000000000002f RBX: 0000000000000000 RCX: ffff88801bfc8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1db510f R12: 1ffff920006472cd
R13: dffffc0000000000 R14: 000000000000017c R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888126e12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff6002b6000 CR3: 000000002be62000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 txLazyCommit fs/jfs/jfs_txnmgr.c:2685 [inline]
 jfs_lazycommit+0x55c/0xa10 fs/jfs/jfs_txnmgr.c:2734
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txEnd+0x1c0/0x530 fs/jfs/jfs_txnmgr.c:540
Code: 43 0f b6 04 2c 84 c0 0f 85 d8 02 00 00 66 41 89 2e 0f b7 44 24 04 89 05 4e 09 96 15 4c 8d b3 7c 01 00 00 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 cb 02 00 00 45 8b 3e 41 8d 77 ff 41 89
RSP: 0018:ffffc900039f7c00 EFLAGS: 00010203
RAX: 000000000000002f RBX: 0000000000000000 RCX: ffff88801bfc8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1db510f R12: 1ffff920006472cd
R13: dffffc0000000000 R14: 000000000000017c R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888126e12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff6002b6000 CR3: 000000002be62000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	43 0f b6 04 2c       	movzbl (%r12,%r13,1),%eax
   5:	84 c0                	test   %al,%al
   7:	0f 85 d8 02 00 00    	jne    0x2e5
   d:	66 41 89 2e          	mov    %bp,(%r14)
  11:	0f b7 44 24 04       	movzwl 0x4(%rsp),%eax
  16:	89 05 4e 09 96 15    	mov    %eax,0x1596094e(%rip)        # 0x1596096a
  1c:	4c 8d b3 7c 01 00 00 	lea    0x17c(%rbx),%r14
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 cb 02 00 00    	jne    0x302
  37:	45 8b 3e             	mov    (%r14),%r15d
  3a:	41 8d 77 ff          	lea    -0x1(%r15),%esi
  3e:	41                   	rex.B
  3f:	89                   	.byte 0x89