[OpenWrt-Devel] [PATCH] use strncpy instead of strcpy

Hauke Mehrtens hauke at hauke-m.de
Thu Dec 26 07:49:46 EST 2019

On 12/24/19 10:50 PM, Petr Štetiar wrote:
> Khem Raj <raj.khem at gmail.com> [2019-12-24 10:02:13]:
> Hi,
> use "PATCH libubox" subject prefix, because there is no blobmsg.c file in the
> main tree.
>> Fixes error: '__builtin_strcpy' offset 6 from the object at 'attr' is out of
>> the bounds of referenced subobject 'name' with type 'uint8_t[0]' {aka
>> 'unsigned char[0]'} at offset 6 [-Werror=array-bounds]
> out of curiosity, which target/compiler is that? I'm not able to reproduce
> it on any of the pre-selected CI targets[1].

Hi Petr,

The fortify headers are preventing some of these warnings, I see them
when compiling without fortify header or when using glibc.

I started to look into this problem, but it looks more complicated to
change the fortify headers in a way, that the compile time buffer
overflow detection still works like expected for all functions which are
supported by gcc.

Please also use a toolchian with glibc when compiling in CI.


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