Oops: general protection fault, probably for non-canonical address 0xdffffc0000000104: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000820-0x0000000000000827]
CPU: 1 UID: 0 PID: 17773 Comm: syz.1.2281 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2665 [inline]
RIP: 0010:diRead+0x151/0xb90 fs/jfs/jfs_imap.c:316
Code: 89 f0 48 c1 e8 03 80 3c 28 00 74 08 4c 89 f7 e8 95 8e d9 fe 4c 89 64 24 50 4d 8b 36 4d 8d be 20 08 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 ff e8 71 8e d9 fe 4d 8b 2f 4d 8d 7d 28 4c
RSP: 0018:ffffc9000407f758 EFLAGS: 00010202
RAX: 0000000000000104 RBX: 0000000000000005 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000ffffffff
RBP: dffffc0000000000 R08: ffff88804911dc67 R09: 1ffff11009223b8c
R10: dffffc0000000000 R11: ffffed1009223b8d R12: ffff88804911dfc0
R13: ffff888078bba5e0 R14: 0000000000000000 R15: 0000000000000820
FS:  00007fa7f29086c0(0000) GS:ffff8881253ab000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f48261e8600 CR3: 000000008dfe6000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 jfs_iget+0x89/0x470 fs/jfs/inode.c:35
 jfs_lookup+0x220/0x420 fs/jfs/namei.c:1472
 __lookup_slow+0x2b7/0x410 fs/namei.c:1916
 lookup_slow+0x53/0x70 fs/namei.c:1933
 walk_component fs/namei.c:2279 [inline]
 lookup_last fs/namei.c:2780 [inline]
 path_lookupat+0x3f5/0x8c0 fs/namei.c:2804
 filename_lookup+0x256/0x5d0 fs/namei.c:2833
 do_sys_truncate+0xbb/0x1c0 fs/open.c:140
 __do_sys_truncate fs/open.c:154 [inline]
 __se_sys_truncate fs/open.c:152 [inline]
 __x64_sys_truncate+0x5b/0x70 fs/open.c:152
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa7f199aeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa7f2908028 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007fa7f1c16090 RCX: 00007fa7f199aeb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000080
RBP: 00007fa7f1a08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa7f1c16128 R14: 00007fa7f1c16090 R15: 00007ffc983b1c28
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2665 [inline]
RIP: 0010:diRead+0x151/0xb90 fs/jfs/jfs_imap.c:316
Code: 89 f0 48 c1 e8 03 80 3c 28 00 74 08 4c 89 f7 e8 95 8e d9 fe 4c 89 64 24 50 4d 8b 36 4d 8d be 20 08 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 ff e8 71 8e d9 fe 4d 8b 2f 4d 8d 7d 28 4c
RSP: 0018:ffffc9000407f758 EFLAGS: 00010202
RAX: 0000000000000104 RBX: 0000000000000005 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000ffffffff
RBP: dffffc0000000000 R08: ffff88804911dc67 R09: 1ffff11009223b8c
R10: dffffc0000000000 R11: ffffed1009223b8d R12: ffff88804911dfc0
R13: ffff888078bba5e0 R14: 0000000000000000 R15: 0000000000000820
FS:  00007fa7f29086c0(0000) GS:ffff8881253ab000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000057eff8 CR3: 000000008dfe6000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	89 f0                	mov    %esi,%eax
   2:	48 c1 e8 03          	shr    $0x3,%rax
   6:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
   a:	74 08                	je     0x14
   c:	4c 89 f7             	mov    %r14,%rdi
   f:	e8 95 8e d9 fe       	call   0xfed98ea9
  14:	4c 89 64 24 50       	mov    %r12,0x50(%rsp)
  19:	4d 8b 36             	mov    (%r14),%r14
  1c:	4d 8d be 20 08 00 00 	lea    0x820(%r14),%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 ff             	mov    %r15,%rdi
  33:	e8 71 8e d9 fe       	call   0xfed98ea9
  38:	4d 8b 2f             	mov    (%r15),%r13
  3b:	4d 8d 7d 28          	lea    0x28(%r13),%r15
  3f:	4c                   	rex.WR