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AppArmor WARN aa_sock_msg_perm: ((!sock)): 
WARNING: CPU: 1 PID: 17611 at security/apparmor/lsm.c:938 aa_sock_msg_perm.constprop.0+0xd1/0x160 security/apparmor/lsm.c:938
Kernel panic - not syncing: panic_on_warn set ...
CPU: 2 PID: 17611 Comm: vhci_tx Not tainted 5.9.0-rc8-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x198/0x1fd lib/dump_stack.c:118
 panic+0x382/0x7fb kernel/panic.c:231
 __warn.cold+0x20/0x4b kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:aa_sock_msg_perm.constprop.0+0xd1/0x160 security/apparmor/lsm.c:938
Code: 89 ee 4c 89 e7 5b 5d 41 5c 41 5d 41 5e e9 c7 fa 02 00 e8 52 f6 e7 fd 48 c7 c6 40 d5 d2 88 48 c7 c7 40 bf d2 88 e8 41 33 b8 fd <0f> 0b e9 4a ff ff ff e8 33 f6 e7 fd 48 c7 c6 40 d5 d2 88 48 c7 c7
RSP: 0018:ffffc90004947b80 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888059e5d140 RSI: ffffffff815f5a55 RDI: fffff52000928f62
RBP: ffffc90004947ce8 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000b2f R11: 0000000000000000 R12: ffffffff88d2c4a0
R13: 0000000000000002 R14: ffffc90004947ce8 R15: 0000000000000000
 security_socket_sendmsg+0x50/0xb0 security/security.c:2124
 sock_sendmsg+0x3f/0x120 net/socket.c:668
 vhci_send_cmd_submit+0x7e4/0xd80 drivers/usb/usbip/vhci_tx.c:139
 vhci_tx_loop+0xbd/0x2ea drivers/usb/usbip/vhci_tx.c:241
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Kernel Offset: disabled
Rebooting in 86400 seconds..