On Fri, Jan 17, 2025 at 07:11:46AM +0100, Greg Kroah-Hartman wrote:
> On Thu, Jan 16, 2025 at 06:05:43PM +0200, Andy Shevchenko wrote:
> > GCC is not happy about the buffer size:
> >
> > drivers/usb/core/hcd.c:441:48: error: ‘%s’ directive output may be truncated writing up to 64 bytes into a region of size between 35 and 99 [-Werror=format-truncation=]
> > 441 | snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname,
> > | ^~
> > 442 | init_utsname()->release, hcd->driver->description);
> > | ~~~~~~~~~~~~~~~~~~~~~~~
> >
> > Bump the size to get it enough for the possible strings.
...
> > static unsigned
> > rh_string(int id, struct usb_hcd const *hcd, u8 *data, unsigned len)
> > {
> > - char buf[100];
> > + char buf[160];
> > char const *s;
> > static char const langids[4] = {4, USB_DT_STRING, 0x09, 0x04};
>
> Worst case it's properly truncated so why do we need to worry about this
> "warning"?
With CONFIG_WERROR=y it's a compilation error. My goal is to have
i386_defconfig and x86_64_defconfig to be compiled with `make W=1`.
> And what compiler version is giving that, I don't see that
> here in my build testing.
`make W=1` (and be sure that CONFIG_WERROR=y).
$ gcc --version
gcc (Debian 14.2.0-12) 14.2.0
(IIRC that had been started with any GCC from v13?)
--
With Best Regards,
Andy Shevchenko
