BUG: kernel NULL pointer dereference, address: 0000000000000038
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 10df72067 P4D 10df72067 PUD 10df73067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP NOPTI
CPU: 0 PID: 3437 Comm: syz.3.16 Not tainted 6.8.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__lock_acquire.constprop.0+0x2f6/0x570 kernel/locking/lockdep.c:5009
Code: 0a 48 83 f8 ff 0f 85 11 02 00 00 0f b7 45 20 66 25 ff 1f 66 89 44 24 16 0f b6 45 22 83 e0 03 88 44 24 10 e9 69 fe ff ff 89 f0 <48> 8b 44 c7 08 48 85 c0 0f 85 64 fd ff ff e9 35 fd ff ff e8 32 61
RSP: 0018:ffffc900024bf8b0 EFLAGS: 00010097
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000030
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888103b52140 R15: 0000000000000200
FS:  00007fae9485d6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000038 CR3: 000000010ffe6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire kernel/locking/lockdep.c:5754 [inline]
 lock_acquire+0xab/0x180 kernel/locking/lockdep.c:5719
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
 _raw_spin_lock_bh+0x2e/0x40 kernel/locking/spinlock.c:178
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 modify_prefix_route+0xc0/0x1a0 net/ipv6/addrconf.c:4784
 inet6_addr_modify net/ipv6/addrconf.c:4876 [inline]
 inet6_rtm_newaddr+0x67e/0x800 net/ipv6/addrconf.c:5011
 rtnetlink_rcv_msg+0x17d/0x490 net/core/rtnetlink.c:6606
 netlink_rcv_skb+0x53/0x100 net/netlink/af_netlink.c:2543
 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]
 netlink_unicast+0x2ab/0x3e0 net/netlink/af_netlink.c:1367
 netlink_sendmsg+0x219/0x480 net/netlink/af_netlink.c:1908
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x361/0x3a0 net/socket.c:2584
 ___sys_sendmsg+0x95/0xe0 net/socket.c:2638
 __sys_sendmsg+0x75/0xc0 net/socket.c:2667
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x73/0x180 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fae9397e819
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:00007fae9485d038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fae93b35fa0 RCX: 00007fae9397e819
RDX: 0000000000040040 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 00007fae939f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fae93b35fa0 R15: 00007ffe934928c8
 </TASK>
Modules linked in:
CR2: 0000000000000038
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire.constprop.0+0x2f6/0x570 kernel/locking/lockdep.c:5009
Code: 0a 48 83 f8 ff 0f 85 11 02 00 00 0f b7 45 20 66 25 ff 1f 66 89 44 24 16 0f b6 45 22 83 e0 03 88 44 24 10 e9 69 fe ff ff 89 f0 <48> 8b 44 c7 08 48 85 c0 0f 85 64 fd ff ff e9 35 fd ff ff e8 32 61
RSP: 0018:ffffc900024bf8b0 EFLAGS: 00010097
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000030
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888103b52140 R15: 0000000000000200
FS:  00007fae9485d6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000038 CR3: 000000010ffe6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	0a 48 83             	or     -0x7d(%rax),%cl
   3:	f8                   	clc
   4:	ff 0f                	decl   (%rdi)
   6:	85 11                	test   %edx,(%rcx)
   8:	02 00                	add    (%rax),%al
   a:	00 0f                	add    %cl,(%rdi)
   c:	b7 45                	mov    $0x45,%bh
   e:	20 66 25             	and    %ah,0x25(%rsi)
  11:	ff 1f                	lcall  *(%rdi)
  13:	66 89 44 24 16       	mov    %ax,0x16(%rsp)
  18:	0f b6 45 22          	movzbl 0x22(%rbp),%eax
  1c:	83 e0 03             	and    $0x3,%eax
  1f:	88 44 24 10          	mov    %al,0x10(%rsp)
  23:	e9 69 fe ff ff       	jmp    0xfffffe91
  28:	89 f0                	mov    %esi,%eax
* 2a:	48 8b 44 c7 08       	mov    0x8(%rdi,%rax,8),%rax <-- trapping instruction
  2f:	48 85 c0             	test   %rax,%rax
  32:	0f 85 64 fd ff ff    	jne    0xfffffd9c
  38:	e9 35 fd ff ff       	jmp    0xfffffd72
  3d:	e8                   	.byte 0xe8
  3e:	32                   	.byte 0x32
  3f:	61                   	(bad)