BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 9edd7067 P4D 9edd7067 PUD 8c6f2067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 26038 Comm: syz-executor.4 Not tainted 5.6.0-rc3-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:ffffc90005877b80 EFLAGS: 00010246
RAX: 1ffff11014cfb200 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffff8880a2f98718 RSI: 0000000000000000 RDI: ffff8880a67d9140
RBP: ffffc90005877bd8 R08: ffffffff87026f8e R09: fffffbfff140652a
R10: fffffbfff140652a R11: 0000000000000000 R12: ffff8880a67d95d0
R13: ffff8880a67d9140 R14: dffffc0000000000 R15: 1ffff11014cfb2ba
FS:  00007fa59e151700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000008f1b7000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 cipso_v4_sock_setattr+0x34b/0x470 net/ipv4/cipso_ipv4.c:1888
 netlbl_sock_setattr+0x2a7/0x310 net/netlabel/netlabel_kapi.c:989
 smack_netlabel security/smack/smack_lsm.c:2425 [inline]
 smack_inode_setsecurity+0x3da/0x4a0 security/smack/smack_lsm.c:2716
 security_inode_setsecurity+0xb2/0x140 security/security.c:1364
 __vfs_setxattr_noperm+0x16f/0x3e0 fs/xattr.c:197
 vfs_setxattr fs/xattr.c:224 [inline]
 setxattr+0x335/0x430 fs/xattr.c:451
 __do_sys_fsetxattr fs/xattr.c:506 [inline]
 __se_sys_fsetxattr+0x130/0x1b0 fs/xattr.c:495
 __x64_sys_fsetxattr+0xbf/0xd0 fs/xattr.c:495
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c479
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:00007fa59e150c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000be
RAX: ffffffffffffffda RBX: 00007fa59e1516d4 RCX: 000000000045c479
RDX: 00000000200000c0 RSI: 0000000020000080 RDI: 0000000000000005
RBP: 000000000076bfc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000000da R14: 00000000004c3288 R15: 000000000076bfcc
Modules linked in:
CR2: 0000000000000000
---[ end trace 42a7eee9c8fafdcb ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffffc90005877b80 EFLAGS: 00010246
RAX: 1ffff11014cfb200 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffff8880a2f98718 RSI: 0000000000000000 RDI: ffff8880a67d9140
RBP: ffffc90005877bd8 R08: ffffffff87026f8e R09: fffffbfff140652a
R10: fffffbfff140652a R11: 0000000000000000 R12: ffff8880a67d95d0
R13: ffff8880a67d9140 R14: dffffc0000000000 R15: 1ffff11014cfb2ba
FS:  00007fa59e151700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000008f1b7000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400