[Buildroot] [PATCH 1/1] package/netsnmp: fix memory leak in IP-MIB when running without IPv6

Peter Korsgaard peter at korsgaard.com
Wed Dec 23 21:30:11 UTC 2020


>>>>> "wujek" == wujek dev <dev_public at wujek.eu> writes:

 >> This function is only called once, right?
 > Unfortunately not. The bug fixed in this commit causes a leak of 356 bytes every 60 seconds!
 > To hit this problem your system has to fulfil the following:
 > --Linux system with no IPv6 support (precisely, no /proc/net/snmp6 file in the system)
 > --included IP-MIB in the netsnmp

 > The leak also happens when snmp queries are not performed.

Ok :/

 > Note: in netsnmp 5.7.3 there is an option for configure
 > "--enable-ipv6", even without this option enabled the bug show up. In
 > 5.8 the option is contrary "--disable-ipv6", but I haven't checked if
 > the problem is when the disable of ipv6 is activated. For sure the
 > leak happens if netsnmp is compiled with ipv6 support, but there is no
 > such support by a Linux kernel.
 > In 5.9 this problem is fixed.

 > IMHO: this patch should be pushed to all maintenance branches. Would
 > you like to send such patch (with appropriate header) to this mailing
 > list?

Don't worry, I'll take care of backporting it myself.

-- 
Bye, Peter Korsgaard



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