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AppArmor WARN aa_sock_msg_perm: ((!sock)): 
WARNING: CPU: 1 PID: 10462 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: 1 PID: 10462 Comm: syz-executor.5 Not tainted 5.7.0-rc6-next-20200522-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+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x2f/0x3a kernel/panic.c:600
 report_bug+0x27b/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:105 [inline]
 fixup_bug arch/x86/kernel/traps.c:100 [inline]
 do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:197
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:216
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1026
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 57 52 03 00 e8 22 d8 09 fe 48 c7 c6 00 83 8d 88 48 c7 c7 40 6d 8d 88 e8 e1 e3 da fd <0f> 0b e9 4a ff ff ff e8 03 d8 09 fe 48 c7 c6 00 83 8d 88 48 c7 c7
RSP: 0018:ffffc9000187fa38 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000006822 RSI: ffffffff815d3c57 RDI: fffff5200030ff39
RBP: ffffc9000187fd78 R08: ffff88808f206140 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff888d6d00
R13: 0000000000000004 R14: 000000000000004e R15: 0000000000000000
 security_socket_recvmsg+0x78/0xc0 security/security.c:2117
 sock_recvmsg+0x47/0x110 net/socket.c:902
 mptcp_recvmsg+0xb3b/0xd90 net/mptcp/protocol.c:952
 inet_recvmsg+0x121/0x5d0 net/ipv4/af_inet.c:845
 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+0x1be/0x2f0 net/socket.c:2052
 __do_sys_recvfrom net/socket.c:2070 [inline]
 __se_sys_recvfrom net/socket.c:2066 [inline]
 __x64_sys_recvfrom+0xdd/0x1b0 net/socket.c:2066
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45ca29
Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa80a967c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002d
RAX: ffffffffffffffda RBX: 00000000004fb380 RCX: 000000000045ca29
RDX: 000000000000004e RSI: 0000000020000000 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000895 R14: 00000000004cb68c R15: 00007fa80a9686d4
Kernel Offset: disabled
Rebooting in 86400 seconds..