Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 UID: 0 PID: 8861 Comm: syz.9.328 Not tainted 6.15.0-rc4-syzkaller-00011-gf15d97df5afa #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:diRead+0x420/0xb90 fs/jfs/jfs_imap.c:342
Code: 3c 08 00 4c 8b 7c 24 10 74 08 4c 89 f7 e8 f8 29 ea fe 49 8b 1e 48 83 c3 34 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 a4 05 00 00 8b 1b bf 40 00 00 00 89 de e8
RSP: 0018:ffffc900049df758 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000020
RBP: 000000000000001c R08: ffff88805349933f R09: 1ffff1100a693267
R10: dffffc0000000000 R11: ffffed100a693268 R12: 0000000000000000
R13: ffff8880340fa000 R14: ffff8880274cf4a0 R15: 0000000000000000
FS:  00007f4a709b46c0(0000) GS:ffff888126102000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d2b4b2c950 CR3: 000000005ffcc000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_iget+0x89/0x3e0 fs/jfs/inode.c:35
 jfs_lookup+0x1c5/0x380 fs/jfs/namei.c:1469
 __lookup_slow+0x294/0x3d0 fs/namei.c:1817
 lookup_slow+0x53/0x70 fs/namei.c:1834
 walk_component+0x2d2/0x400 fs/namei.c:2138
 lookup_last fs/namei.c:2636 [inline]
 path_lookupat+0x163/0x430 fs/namei.c:2660
 filename_lookup+0x212/0x570 fs/namei.c:2689
 user_path_at+0x3a/0x60 fs/namei.c:3120
 do_sys_truncate+0xa3/0x190 fs/open.c:136
 __do_sys_truncate fs/open.c:150 [inline]
 __se_sys_truncate fs/open.c:148 [inline]
 __x64_sys_truncate+0x5b/0x70 fs/open.c:148
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4a72b8e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4a709b4038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f4a72db6160 RCX: 00007f4a72b8e969
RDX: 0000000000000000 RSI: 0000000000008008 RDI: 00002000000000c0
RBP: 00007f4a72c10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f4a72db6160 R15: 00007ffddec0e228
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:diRead+0x420/0xb90 fs/jfs/jfs_imap.c:342
Code: 3c 08 00 4c 8b 7c 24 10 74 08 4c 89 f7 e8 f8 29 ea fe 49 8b 1e 48 83 c3 34 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 a4 05 00 00 8b 1b bf 40 00 00 00 89 de e8
RSP: 0018:ffffc900049df758 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000034 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000020
RBP: 000000000000001c R08: ffff88805349933f R09: 1ffff1100a693267
R10: dffffc0000000000 R11: ffffed100a693268 R12: 0000000000000000
R13: ffff8880340fa000 R14: ffff8880274cf4a0 R15: 0000000000000000
FS:  00007f4a709b46c0(0000) GS:ffff888126102000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f17ffbf4440 CR3: 000000005ffcc000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	3c 08                	cmp    $0x8,%al
   2:	00 4c 8b 7c          	add    %cl,0x7c(%rbx,%rcx,4)
   6:	24 10                	and    $0x10,%al
   8:	74 08                	je     0x12
   a:	4c 89 f7             	mov    %r14,%rdi
   d:	e8 f8 29 ea fe       	call   0xfeea2a0a
  12:	49 8b 1e             	mov    (%r14),%rbx
  15:	48 83 c3 34          	add    $0x34,%rbx
  19:	48 89 d8             	mov    %rbx,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	0f b6 04 08          	movzbl (%rax,%rcx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 a4 05 00 00    	jne    0x5da
  36:	8b 1b                	mov    (%rbx),%ebx
  38:	bf 40 00 00 00       	mov    $0x40,%edi
  3d:	89 de                	mov    %ebx,%esi
  3f:	e8                   	.byte 0xe8