general protection fault, probably for non-canonical address 0xdffffc0000000104: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000820-0x0000000000000827]
CPU: 1 PID: 4349 Comm: syz.2.9 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2665 [inline]
RIP: 0010:diRead+0x149/0xbb0 fs/jfs/jfs_imap.c:316
Code: 5c 24 50 48 81 c3 98 fc ff ff 48 89 df be 01 00 00 00 e8 6a 18 93 fe 4c 89 7c 24 10 49 81 c7 20 08 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 ff e8 09 f2 f3 fe 4c 89 64 24 18 4d 8b 2f
RSP: 0018:ffffc900033ffa58 EFLAGS: 00010202
RAX: 0000000000000104 RBX: ffff88805f1c25c8 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 00000000ffffffff
RBP: dffffc0000000000 R08: dffffc0000000000 R09: ffffed100be384bb
R10: ffffed100be384bb R11: 1ffff1100be384ba R12: ffff88805f100470
R13: ffff88807bb1c178 R14: 0000000000000020 R15: 0000000000000820
FS:  00007fcbd30936c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcbd3092f98 CR3: 0000000072c21000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_iget+0x89/0x3c0 fs/jfs/inode.c:35
 jfs_lookup+0x1c2/0x380 fs/jfs/namei.c:1467
 lookup_one_qstr_excl+0x10e/0x240 fs/namei.c:1563
 filename_create+0x21e/0x450 fs/namei.c:3836
 do_mkdirat+0x9d/0x5a0 fs/namei.c:4080
 __do_sys_mkdirat fs/namei.c:4105 [inline]
 __se_sys_mkdirat fs/namei.c:4103 [inline]
 __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4103
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fcbd4e4cba9
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:00007fcbd3093038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fcbd5094090 RCX: 00007fcbd4e4cba9
RDX: 0000000000000000 RSI: 0000200000000100 RDI: ffffffffffffff9c
RBP: 00007fcbd4ecfe19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcbd5094128 R14: 00007fcbd5094090 R15: 00007ffd645bcad8
 </TASK>
Modules linked in:
---[ end trace 7a573d994b6c195c ]---
RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2665 [inline]
RIP: 0010:diRead+0x149/0xbb0 fs/jfs/jfs_imap.c:316
Code: 5c 24 50 48 81 c3 98 fc ff ff 48 89 df be 01 00 00 00 e8 6a 18 93 fe 4c 89 7c 24 10 49 81 c7 20 08 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 ff e8 09 f2 f3 fe 4c 89 64 24 18 4d 8b 2f
RSP: 0018:ffffc900033ffa58 EFLAGS: 00010202
RAX: 0000000000000104 RBX: ffff88805f1c25c8 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 00000000ffffffff
RBP: dffffc0000000000 R08: dffffc0000000000 R09: ffffed100be384bb
R10: ffffed100be384bb R11: 1ffff1100be384ba R12: ffff88805f100470
R13: ffff88807bb1c178 R14: 0000000000000020 R15: 0000000000000820
FS:  00007fcbd30936c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5ae1adb358 CR3: 0000000072c21000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	5c                   	pop    %rsp
   1:	24 50                	and    $0x50,%al
   3:	48 81 c3 98 fc ff ff 	add    $0xfffffffffffffc98,%rbx
   a:	48 89 df             	mov    %rbx,%rdi
   d:	be 01 00 00 00       	mov    $0x1,%esi
  12:	e8 6a 18 93 fe       	call   0xfe931881
  17:	4c 89 7c 24 10       	mov    %r15,0x10(%rsp)
  1c:	49 81 c7 20 08 00 00 	add    $0x820,%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 09 f2 f3 fe       	call   0xfef3f241
  38:	4c 89 64 24 18       	mov    %r12,0x18(%rsp)
  3d:	4d 8b 2f             	mov    (%r15),%r13