[ovs-dev] [PATCH 1/2] lldp: fix string warnings
Ben Pfaff
blp at ovn.org
Thu Jun 14 20:23:50 UTC 2018
On Wed, Jun 13, 2018 at 03:43:03PM -0400, Aaron Conole wrote:
> lib/lldp/lldpd.c: In function :
> lib/lldp/lldpd.c:520:17: warning: output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
> strncat(buffer, cfg->g_protocols[i].name,
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> strlen(cfg->g_protocols[i].name));
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> lib/lldp/lldpd.c: In function :
> lib/lldp/lldpd.c:519:17: warning: specified bound 2 equals source length [-Wstringop-overflow=]
> strncat(buffer, ", ", 2);
> ^~~~~~~~~~~~~~~~~~~~~~~~
>
> Closer inspection shows that buffer is only used to output protocol names
> when debug logging is enabled, so restructure the code a bit as well.
>
> Signed-off-by: Aaron Conole <aconole at redhat.com>
Thanks, Aaron. I made a few further simplifications and applied this to
master.
What version of GCC are you using? Are you turning up the warning
level explicitly? I don't get these warnings with OVS default warnings
and GCC 7.2.
Thanks,
Ben.
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