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From "Mesos ReviewBot" <revi...@mesos.apache.org>
Subject Re: Review Request 40435: Fixed pointer alignment error in IP::create().
Date Thu, 03 Dec 2015 03:38:14 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/40435/#review108770
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Patch looks great!

Reviews applied: [40435]

Passed command: export OS=ubuntu:14.04;export CONFIGURATION="--verbose";export COMPILER=gcc;
./support/docker_build.sh

- Mesos ReviewBot


On Dec. 3, 2015, 1:45 a.m., Neil Conway wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/40435/
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> 
> (Updated Dec. 3, 2015, 1:45 a.m.)
> 
> 
> Review request for mesos, Benjamin Bannier, Ben Mahler, Joris Van Remoortere, Michael
Park, and Niklas Nielsen.
> 
> 
> Bugs: MESOS-3939
>     https://issues.apache.org/jira/browse/MESOS-3939
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> The previous code took the address of a "struct sockaddr", and then cast the
> resulting pointer to "struct sockaddr_storage *". The alignment requirements for
> "struct sockaddr_storage *" are more strict than for "struct sockaddr *", and
> hence this code produced undefined behavior per ubsan in GCC 5.2.
> 
> Along the way, tweak the code to use reinterpret_cast rather than a C-style
> cast, and not to unnecessarily cast-away constness.
> 
> MESOS-3939.
> 
> 
> Diffs
> -----
> 
>   3rdparty/libprocess/3rdparty/stout/include/stout/ip.hpp 3e506e1e94ee32e3a19870e1fd72d9968c5f8e67

> 
> Diff: https://reviews.apache.org/r/40435/diff/
> 
> 
> Testing
> -------
> 
> "make check" on Linux/AMD64 + GCC 5.2 + ubsan; without fix, ubsan reports an error. With
fix, ubsan does not report (this) error.
> 
> 
> Thanks,
> 
> Neil Conway
> 
>


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