On 14 May 2015, at 21:14, Adam Lackorzynski <a...@os.inf.tu-dresden.de> wrote:
> 
> Hi,
> 
> I'm using libexec/dovecot/imap via a ssh tunnel. 2.2.17 segfaults while
> accessing a NULL pointer. The following change fixes it for me:
> 
> 
> --- dovecot-2.2.17/src/lib-imap/imap-keepalive.c      2015-05-03 
> 11:12:11.000000000 +0200
> +++ dovecot-2.2.17/src/lib-imap/imap-keepalive.c      2015-05-14 
> 20:06:29.490617405 +0200
> @@ -11,6 +11,8 @@
> {
>       unsigned int addr;
> 
> +     if (!ip)
> +             return FALSE;
>       if (ip->family == 0)
>               return FALSE;
>       if (ip->family == AF_INET) {

Slightly different fix: http://hg.dovecot.org/dovecot-2.2/rev/4c4eff229426

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