Merge tag 'bootconfig-fixes-v7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel...

Pull bootconfig fix from Masami Hiramatsu:

 - bootconfig: Fix NULL-pointer arithmetic

   Fix undefined pointer arithmetic in xbc_snprint_cmdline() when
   probing the buffer length with NULL and size 0. Track the written
   length as a size_t instead to prevent build-time UBSan/FORTIFY_SOURCE
   failures.

* tag 'bootconfig-fixes-v7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  bootconfig: fix NULL-pointer arithmetic in xbc_snprint_cmdline()