BUG: kernel NULL pointer dereference, address: 0000000000000068
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 1055a8067 P4D 1055a8067 PUD 109062067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 7208 Comm: syz-executor.0 Not tainted 5.10.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:reiserfs_xattr_jcreate_nblocks fs/reiserfs/xattr.h:78 [inline]
RIP: 0010:reiserfs_xattr_set+0x9f/0x160 fs/reiserfs/xattr.c:631
Code: 00 00 80 01 48 83 f8 01 48 19 c0 24 56 48 05 e0 00 00 00 f6 83 80 fe ff ff 40 75 18 48 8b 8e a0 05 00 00 48 8d 14 00 48 01 d0 <48> 83 79 68 00 74 03 48 89 d0 49 01 c4 e8 ff 07 00 00 48 8b 73 28
RSP: 0018:ffffc900035e3c78 EFLAGS: 00010212
RAX: 00000000000000a2 RBX: ffff88810a981d38 RCX: 0000000000000000
RDX: 000000000000006c RSI: ffff888104aea000 RDI: ffff8881090de000
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000002
R10: ffffc900035e3dd0 R11: 0000000000000000 R12: 0000000000000000
R13: ffffc900035e3dd0 R14: ffff8881054a9170 R15: 0000000000000000
FS:  00007f592c2486c0(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000068 CR3: 00000001054ab000 CR4: 0000000000350ee0
Call Trace:
 __vfs_setxattr+0x5e/0x80 fs/xattr.c:177
 __vfs_setxattr_noperm+0x6b/0x1f0 fs/xattr.c:208
 vfs_setxattr+0x66/0x110 fs/xattr.c:283
 setxattr+0x120/0x240 fs/xattr.c:548
 __do_sys_fsetxattr fs/xattr.c:603 [inline]
 __se_sys_fsetxattr fs/xattr.c:592 [inline]
 __x64_sys_fsetxattr+0x98/0xc0 fs/xattr.c:592
 do_syscall_64+0x2e/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f592c6e6ce9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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:00007f592c2480c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000be
RAX: ffffffffffffffda RBX: 00007f592c806050 RCX: 00007f592c6e6ce9
RDX: 0000000020000400 RSI: 00000000200003c0 RDI: 0000000000000004
RBP: 00007f592c73347a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000006 R14: 00007f592c806050 R15: 00007ffd61ca4f28
Modules linked in:
CR2: 0000000000000068
---[ end trace 6032be78742df4ce ]---
RIP: 0010:reiserfs_xattr_jcreate_nblocks fs/reiserfs/xattr.h:78 [inline]
RIP: 0010:reiserfs_xattr_set+0x9f/0x160 fs/reiserfs/xattr.c:631
Code: 00 00 80 01 48 83 f8 01 48 19 c0 24 56 48 05 e0 00 00 00 f6 83 80 fe ff ff 40 75 18 48 8b 8e a0 05 00 00 48 8d 14 00 48 01 d0 <48> 83 79 68 00 74 03 48 89 d0 49 01 c4 e8 ff 07 00 00 48 8b 73 28
RSP: 0018:ffffc900035e3c78 EFLAGS: 00010212
RAX: 00000000000000a2 RBX: ffff88810a981d38 RCX: 0000000000000000
RDX: 000000000000006c RSI: ffff888104aea000 RDI: ffff8881090de000
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000002
R10: ffffc900035e3dd0 R11: 0000000000000000 R12: 0000000000000000
R13: ffffc900035e3dd0 R14: ffff8881054a9170 R15: 0000000000000000
FS:  00007f592c2486c0(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000068 CR3: 00000001054ab000 CR4: 0000000000350ee0
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	80 01 48             	addb   $0x48,(%rcx)
   5:	83 f8 01             	cmp    $0x1,%eax
   8:	48 19 c0             	sbb    %rax,%rax
   b:	24 56                	and    $0x56,%al
   d:	48 05 e0 00 00 00    	add    $0xe0,%rax
  13:	f6 83 80 fe ff ff 40 	testb  $0x40,-0x180(%rbx)
  1a:	75 18                	jne    0x34
  1c:	48 8b 8e a0 05 00 00 	mov    0x5a0(%rsi),%rcx
  23:	48 8d 14 00          	lea    (%rax,%rax,1),%rdx
  27:	48 01 d0             	add    %rdx,%rax
* 2a:	48 83 79 68 00       	cmpq   $0x0,0x68(%rcx) <-- trapping instruction
  2f:	74 03                	je     0x34
  31:	48 89 d0             	mov    %rdx,%rax
  34:	49 01 c4             	add    %rax,%r12
  37:	e8 ff 07 00 00       	call   0x83b
  3c:	48 8b 73 28          	mov    0x28(%rbx),%rsi