[Olsr-commit] OLSR.org main repository branch, stable, updated. OLSRD_0_6_3-113-gf4d250a

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- Log -----------------------------------------------------------------
commit f4d250ad4fad5fcfe5b5feaac3f3e121adef3fba
Author: Jo-Philipp Wich <(spam-protected)>
Date:   Fri Jun 22 03:17:59 2012 +0200

    olsrd: fix stack corruption in net_output()
    
    The net_output() function indirectly uses the stack variables dst and dst6
    outside of the scope they're declared in, this might leads to olsr_sendto()
    being called with a corrupted destination sockaddr_in.
    
    This failure condition can be observed in the log, olsrd will continuosly
    print "sendto(v4): Invalid Argument" or a similar message. On ARM it has been
    reported to result in "Unsupported Address Family".
    
    This bug became apparant on a custon OpenWrt x86_64 uClibc target using the
    Linaro GCC 4.7-2012.04 compiler, it has been reported for an unspecified ARM
    target as well.
    
    The offending code seems to be unchanged since 2008 and it does not cause
    issues on 32bit systems and/or with older (Linaro) GCC versions, but the
    compiler used in our tests seems to perform more aggressive optimizations
    leading to a stack corruption.

-----------------------------------------------------------------------

Summary of changes:
 src/net_olsr.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)


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