[dovecot/core] b27a8a: config: fix possible out-of-bound access in parsin...

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: b27a8a97319620c4a6d97f2f98a2f0f15669d8f9
      https://github.com/dovecot/core/commit/b27a8a97319620c4a6d97f2f98a2f0f15669d8f9
  Author: Baofeng Wang <baofeng.wang at dovecot.fi>
  Date:   2016-05-19 (Thu, 19 May 2016)

  Changed paths:
    M src/config/config-parser.c

  Log Message:
  -----------
  config: fix possible out-of-bound access in parsing function

Add low-bound check when decreasing string pointer from tail.