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List:       oss-security
Subject:    [oss-security] Re: [Xen-devel] Xen Security Advisory 206 - xenstore denial of service via repeated u
From:       Michael Young <m.a.young () durham ! ac ! uk>
Date:       2017-03-29 22:16:15
Message-ID: alpine.LFD.2.20.1703292229380.2723 () austen3 ! home
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On Wed, 29 Mar 2017, Xen.org security team wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
>                    Xen Security Advisory XSA-206
>                              version 9
>
>            xenstore denial of service via repeated update

I am seeing a build failure from these patches when using gcc 7. The 
problem is with
xsa206-4.80002-xenstored-Log-when-the-write-transaction-rate-limit-.patch 
because in tools/xenstore/xenstored_domain.c the patch adds the boolean 
wrl_delay_logged to the structure "domain" but later it tries to increment 
it, resulting in the error 
xenstored_domain.c: In function 'wrl_apply_debit_actual':
xenstored_domain.c:949:32: error: increment of a boolean expression 
[-Werror=bool-operation]
    if (!domain->wrl_delay_logged++) {

 	Michael Young
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