simon-git: putty (master): Simon Tatham

[Commits to Tartarus hosted VCS]

TL;DR:
  7705fc4 Fix buffer management in strbuf_catfv.

Repository:     https://git.tartarus.org/simon/putty.git
On the web:     https://git.tartarus.org/?p=simon/putty.git
Branch updated: master
Committer:      Simon Tatham <anakin at pobox.com>
Date:           2017-02-20 20:52:17

commit 7705fc4470b76ec7979dc00e5c97efd720d5e335
web diff https://git.tartarus.org/?p=simon/putty.git;a=commitdiff;h=7705fc4470b76ec7979dc00e5c97efd720d5e335;hp=bd65d477920b8d53833f6161e261fc6139a873ee
Author: Simon Tatham <anakin at pobox.com>
Date:   Mon Feb 20 20:30:14 2017 +0000

    Fix buffer management in strbuf_catfv.
    
    Thanks to Tim Kosse for pointing out that I had _completely_ cocked up
    all the code that was supposed to enlarge the buffer in the strbuf
    structure, by failing to pass in 'oldsize' to the innermost
    dupvprintf_inner function by reference, so that the size was never
    updated.
    
    Fortunately, this whole mechanism was something I dashed off for the
    purposes of buildinfo(), which means it's only ever used to glue
    together a fixed number of compile-time string constants, for which
    there turns out to be plenty to spare in the standard 512 bytes
    allocated to a new strbuf. So it's at least not dangerous, though it
    clearly needs to be fixed before I make the mistake of using
    strbuf_catf[v] for anything else!

 misc.c | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)