syzbot

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: 4341 Comm: syz-executor339 Tainted: G        W          6.1.121-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2665 [inline]
RIP: 0010:diRead+0x14e/0xbb0 fs/jfs/jfs_imap.c:316
Code: 8b 75 80 48 89 6c 24 28 4c 8d bd 98 fc ff ff 4c 89 ff be 01 00 00 00 e8 50 bf 5a fe 49 8d 9e 20 08 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 73 ef d2 fe 4c 8b 2b 49 8d 6d 28
RSP: 0018:ffffc90003e67738 EFLAGS: 00010202
RAX: 0000000000000104 RBX: 0000000000000820 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffff88806dd40430 R08: dffffc0000000000 R09: ffffed100dba801b
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000004
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88806dd400c8
FS:  00007f63aba506c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f63aba50d58 CR3: 0000000028fd0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_iget+0x88/0x3b0 fs/jfs/inode.c:35
 jfs_lookup+0x222/0x400 fs/jfs/namei.c:1467
 __lookup_slow+0x27e/0x3d0 fs/namei.c:1690
 lookup_slow+0x53/0x70 fs/namei.c:1707
 walk_component+0x2d0/0x400 fs/namei.c:1998
 lookup_last fs/namei.c:2455 [inline]
 path_lookupat+0x16f/0x450 fs/namei.c:2479
 filename_lookup+0x251/0x600 fs/namei.c:2508
 user_path_at_empty+0x3e/0x60 fs/namei.c:2905
 user_path_at include/linux/namei.h:57 [inline]
 do_fchownat+0xec/0x240 fs/open.c:761
 __do_sys_lchown fs/open.c:792 [inline]
 __se_sys_lchown fs/open.c:790 [inline]
 __x64_sys_lchown+0x81/0x90 fs/open.c:790
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f63abab4bd9
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:00007f63aba50218 EFLAGS: 00000246 ORIG_RAX: 000000000000005e
RAX: ffffffffffffffda RBX: 00007f63abb426b8 RCX: 00007f63abab4bd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200001c0
RBP: 00007f63abb426b0 R08: 00007ffd6f2e13e7 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f63abb0906b
R13: 00007f63abb09073 R14: 0037656c69662f2e R15: 0031656c69662f2e
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2665 [inline]
RIP: 0010:diRead+0x14e/0xbb0 fs/jfs/jfs_imap.c:316
Code: 8b 75 80 48 89 6c 24 28 4c 8d bd 98 fc ff ff 4c 89 ff be 01 00 00 00 e8 50 bf 5a fe 49 8d 9e 20 08 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 73 ef d2 fe 4c 8b 2b 49 8d 6d 28
RSP: 0018:ffffc90003e67738 EFLAGS: 00010202
RAX: 0000000000000104 RBX: 0000000000000820 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffff88806dd40430 R08: dffffc0000000000 R09: ffffed100dba801b
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000004
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88806dd400c8
FS:  00007f63aba506c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f63aba72000 CR3: 0000000028fd0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	8b 75 80             	mov    -0x80(%rbp),%esi
   3:	48 89 6c 24 28       	mov    %rbp,0x28(%rsp)
   8:	4c 8d bd 98 fc ff ff 	lea    -0x368(%rbp),%r15
   f:	4c 89 ff             	mov    %r15,%rdi
  12:	be 01 00 00 00       	mov    $0x1,%esi
  17:	e8 50 bf 5a fe       	call   0xfe5abf6c
  1c:	49 8d 9e 20 08 00 00 	lea    0x820(%r14),%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 73 ef d2 fe       	call   0xfed2efac
  39:	4c 8b 2b             	mov    (%rbx),%r13
  3c:	49 8d 6d 28          	lea    0x28(%r13),%rbp