tree 6e023a773c858245b4ceca196ec093ad5a9b7298
parent 5fd77a3a0e408c23ab4002a57db980e46bc16e72
author Pete Zaitcev <zaitcev@redhat.com> 1515448001 -0600
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1515510413 +0100

USB: fix usbmon BUG trigger

Automated tests triggered this by opening usbmon and accessing the
mmap while simultaneously resizing the buffers. This bug was with
us since 2006, because typically applications only size the buffers
once and thus avoid racing. Reported by Kirill A. Shutemov.

Reported-by: <syzbot+f9831b881b3e849829fc@syzkaller.appspotmail.com>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>