commit 81f7567c51ad97668d1c3a48e8ecc482e64d4161
author Shuah Khan (Samsung OSG) <shuah@kernel.org> Fri Oct 05 16:17:44 2018 -0600
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> Tue Oct 09 16:13:42 2018 +0200
tree b6ff61e20dad90a6bb9af8bb420ffd71e26a8d90
parent 4b0aaacee51eb6592a03fdefd5ce97558518e291

usb: usbip: Fix BUG: KASAN: slab-out-of-bounds in vhci_hub_control()

vhci_hub_control() accesses port_status array with out of bounds port
value. Fix it to reference port_status[] only with a valid rhport value
when invalid_rhport flag is true.

The invalid_rhport flag is set early on after detecting in port value
is within the bounds or not.

The following is used reproduce the problem and verify the fix:
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14ed8ab6400000

Reported-by: syzbot+bccc1fe10b70fadc78d0@syzkaller.appspotmail.com
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>