BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 86408067 P4D 86408067 PUD 86409067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 8725 Comm: syz-executor.0 Not tainted 5.5.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffffc90002bb7b18 EFLAGS: 00010246
RAX: 0000000000000007 RBX: ffff88808f38e040 RCX: 1ffff11012f0edd3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88808f38e040
RBP: ffffc90002bb7b50 R08: 0000000000000002 R09: fffffbfff14ba179
R10: fffffbfff14ba178 R11: ffffffff8a5d0bc7 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88808f38e4d0 R15: ffff888097876e80
FS:  00007f14ed1f5700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000099cc1000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 cipso_v4_sock_setattr+0x284/0x3c0 net/ipv4/cipso_ipv4.c:1888
 netlbl_sock_setattr+0x18b/0x290 net/netlabel/netlabel_kapi.c:989
 smack_netlabel+0x116/0x160 security/smack/smack_lsm.c:2430
 smack_inode_setsecurity+0x262/0x320 security/smack/smack_lsm.c:2721
 security_inode_setsecurity+0xac/0xf0 security/security.c:1332
 __vfs_setxattr_noperm+0x114/0x370 fs/xattr.c:197
 vfs_setxattr+0xaa/0xe0 fs/xattr.c:224
 setxattr+0x1af/0x280 fs/xattr.c:451
 __do_sys_fsetxattr fs/xattr.c:506 [inline]
 __se_sys_fsetxattr fs/xattr.c:495 [inline]
 __x64_sys_fsetxattr+0x1ac/0x240 fs/xattr.c:495
 do_syscall_64+0xca/0x5f0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c449
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f14ed1f4c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000be
RAX: ffffffffffffffda RBX: 00007f14ed1f56d4 RCX: 000000000045c449
RDX: 0000000020000200 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 000000000076bf20 R08: 0000000000000003 R09: 0000000000000000
R10: 0000000000000009 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000000da R14: 00000000004c3268 R15: 000000000076bf2c
Modules linked in:
CR2: 0000000000000000
---[ end trace 6765d8b5034ad4f0 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffffc90002bb7b18 EFLAGS: 00010246
RAX: 0000000000000007 RBX: ffff88808f38e040 RCX: 1ffff11012f0edd3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88808f38e040
RBP: ffffc90002bb7b50 R08: 0000000000000002 R09: fffffbfff14ba179
R10: fffffbfff14ba178 R11: ffffffff8a5d0bc7 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88808f38e4d0 R15: ffff888097876e80
FS:  00007f14ed1f5700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000099cc1000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400