syzbot

read_mapping_page failed!
ERROR: (device loop0): txCommit: 
general protection fault, probably for non-canonical address 0xdffffc0000000029: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000148-0x000000000000014f]
CPU: 1 PID: 5077 Comm: syz-executor138 Not tainted 6.8.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:txEnd+0x1e5/0x560 fs/jfs/jfs_txnmgr.c:539
Code: 00 84 c0 0f 85 d4 02 00 00 66 41 89 1e 41 0f b7 c5 89 05 fe 86 3b 11 4c 8b 74 24 08 49 8d 9e 4c 01 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 c3 02 00 00 8b 2b 8d 75 ff 89 33 31 ff
RSP: 0018:ffffc90004177990 EFLAGS: 00010213
RAX: 0000000000000029 RBX: 000000000000014c RCX: ffff88801ef7bb80
RDX: ffff88801ef7bb80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff920004c2227 R08: ffffffff832145b7 R09: 1ffffffff2591a8d
R10: dffffc0000000000 R11: fffffbfff2591a8e R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000110
FS:  00007f106a3d86c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f106a3d8d58 CR3: 000000007c4ee000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 add_missing_indices fs/jfs/jfs_dtree.c:2663 [inline]
 jfs_readdir+0x28f1/0x4660 fs/jfs/jfs_dtree.c:3009
 wrap_directory_iterator+0x96/0xe0 fs/readdir.c:67
 iterate_dir+0x53b/0x6f0 fs/readdir.c:110
 __do_sys_getdents fs/readdir.c:326 [inline]
 __se_sys_getdents+0x1ef/0x4d0 fs/readdir.c:311
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f106a43cc59
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f106a3d8218 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 00007f106a4ca6d8 RCX: 00007f106a43cc59
RDX: 0000000000001000 RSI: 0000000020006600 RDI: 0000000000000005
RBP: 00007f106a4ca6d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f106a497110
R13: 0030656c69662f2e R14: 00007ffd8e069d20 R15: 6573726168636f69
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txEnd+0x1e5/0x560 fs/jfs/jfs_txnmgr.c:539
Code: 00 84 c0 0f 85 d4 02 00 00 66 41 89 1e 41 0f b7 c5 89 05 fe 86 3b 11 4c 8b 74 24 08 49 8d 9e 4c 01 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 c3 02 00 00 8b 2b 8d 75 ff 89 33 31 ff
RSP: 0018:ffffc90004177990 EFLAGS: 00010213
RAX: 0000000000000029 RBX: 000000000000014c RCX: ffff88801ef7bb80
RDX: ffff88801ef7bb80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff920004c2227 R08: ffffffff832145b7 R09: 1ffffffff2591a8d
R10: dffffc0000000000 R11: fffffbfff2591a8e R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000110
FS:  00007f106a3d86c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f106a3d8d58 CR3: 000000007c4ee000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	00 84 c0 0f 85 d4 02 	add    %al,0x2d4850f(%rax,%rax,8)
   7:	00 00                	add    %al,(%rax)
   9:	66 41 89 1e          	mov    %bx,(%r14)
   d:	41 0f b7 c5          	movzwl %r13w,%eax
  11:	89 05 fe 86 3b 11    	mov    %eax,0x113b86fe(%rip)        # 0x113b8715
  17:	4c 8b 74 24 08       	mov    0x8(%rsp),%r14
  1c:	49 8d 9e 4c 01 00 00 	lea    0x14c(%r14),%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 20       	movzbl (%rax,%r12,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 c3 02 00 00    	jne    0x2fa
  37:	8b 2b                	mov    (%rbx),%ebp
  39:	8d 75 ff             	lea    -0x1(%rbp),%esi
  3c:	89 33                	mov    %esi,(%rbx)
  3e:	31 ff                	xor    %edi,%edi