Re: [dpdk-dev] [dpdk-stable] [PATCH v1] examples/vm_power: fix strcpy buffer overrun

[Thomas Monjalon <thomas@monjalon.net>]

12/07/2019 16:47, Bruce Richardson:
> On Fri, Jul 12, 2019 at 03:04:02PM +0100, David Hunt wrote:
> > replace strcpy with rte_strlcpy to prevent buffer overrun
> > With fix, attempting to use a VERY lonng vm name results in a nicely
> > truncated 32 character name rather than a segfault:
> > Setting VM Name to [sdfdsfsfsdffdsdsasdsadasdakjshd]
> > 
> > Cc: stable@dpdk.org
> > Fixes: 59287933a0bb ("examples/vm_power: add options to guest app")
> > Signed-off-by: David Hunt <david.hunt@intel.com>

It should be in this order:

Fixes: 59287933a0bb ("examples/vm_power: add options to guest app")
Cc: stable@dpdk.org

Signed-off-by: David Hunt <david.hunt@intel.com>

When in doubt about formatting, please check the git history.
You will find that the recent title prefix in use was "examples/power".

> > --- a/examples/vm_power_manager/guest_cli/main.c
> > +++ b/examples/vm_power_manager/guest_cli/main.c
> > -			strcpy(policy->vm_name, optarg);
> > +			rte_strlcpy(policy->vm_name, optarg, VM_MAX_NAME_SZ);
> 
> You can just use "strlcpy" without the "rte_" prefix. The rte_ version is
> just a fallback used when a standard strlcpy - either natively or from
> libbsd - is unavailable.

Please replace the 2 other occurences of rte_strlcpy in this example
(can be in the same patch with a small comment in the commit log).