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AppArmor WARN aa_sock_msg_perm: ((!sock)): 
WARNING: CPU: 0 PID: 7436 at security/apparmor/lsm.c:933 aa_sock_msg_perm.isra.0+0xd1/0x160 security/apparmor/lsm.c:933
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7436 Comm: syz-executor396 Not tainted 5.7.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x27b/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:175 [inline]
 fixup_bug arch/x86/kernel/traps.c:170 [inline]
 do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:aa_sock_msg_perm.isra.0+0xd1/0x160 security/apparmor/lsm.c:933
Code: 89 ee 4c 89 e7 5b 5d 41 5c 41 5d 41 5e e9 d7 4d 03 00 e8 72 16 0e fe 48 c7 c6 e0 f0 6c 88 48 c7 c7 20 db 6c 88 e8 47 50 df fd <0f> 0b e9 4a ff ff ff e8 53 16 0e fe 48 c7 c6 e0 f0 6c 88 48 c7 c7
RSP: 0018:ffffc90001c87a38 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815ce7f1 RDI: fffff52000390f39
RBP: ffffc90001c87d78 R08: ffff888091e1c280 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff886cdae0
R13: 0000000000000004 R14: 0000000000001000 R15: 0000000040000000
 security_socket_recvmsg+0x78/0xc0 security/security.c:2070
 sock_recvmsg+0x47/0x110 net/socket.c:902
 mptcp_recvmsg+0xb3b/0xd90 net/mptcp/protocol.c:891
 inet_recvmsg+0x121/0x5d0 net/ipv4/af_inet.c:838
 sock_recvmsg_nosec net/socket.c:886 [inline]
 sock_recvmsg net/socket.c:904 [inline]
 sock_recvmsg+0xca/0x110 net/socket.c:900
 __sys_recvfrom+0x1c5/0x2f0 net/socket.c:2057
 __do_sys_recvfrom net/socket.c:2075 [inline]
 __se_sys_recvfrom net/socket.c:2071 [inline]
 __x64_sys_recvfrom+0xdd/0x1b0 net/socket.c:2071
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x448ef9
Code: e8 cc 14 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 9b 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f8afa10fda8 EFLAGS: 00000246 ORIG_RAX: 000000000000002d
RAX: ffffffffffffffda RBX: 00000000006dec28 RCX: 0000000000448ef9
RDX: 0000000000001000 RSI: 00000000200004c0 RDI: 0000000000000003
RBP: 00000000006dec20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000040000000 R11: 0000000000000246 R12: 00000000006dec2c
R13: 00007ffd1a0563ef R14: 00007f8afa1109c0 R15: 00000000006dec2c
Kernel Offset: disabled
Rebooting in 86400 seconds..