Re: [PATCH v4 2/2] kallsyms: Don't leak pointers for unresolved symbols

[Sebastian Andrzej Siewior <bigeasy@linutronix.de>]

On 2026-10-19 13:34:35 [+0300], Andy Shevchenko wrote:
> > +int snprintf_default_pointer(char *buf, unsigned int len, const void *ptr)
> > +{
> > +	struct printf_spec spec = {
> > +		.base = 10,
> > +		.precision = -1,
> > +		.field_width = -1,
> > +	};
> 
> Isn't it the same as default_dec_spec?

Except for .field_width, yes.

> > +	unsigned int w;
> > +	char *endp;
> > +
> > +	endp = default_pointer(buf, buf + len, ptr, spec);
> > +	w = min_t(unsigned int, len - 1, endp - buf);
> 
> May we avoid min_t()?

min() complains about signedness (len unsigned and ptr diff signed).
endp is >= buf so it will be unsigned.
An alternative would be manual comparison if the buffer size has been
exceeded or not and act upon it but this looks simpler.

> > +	buf[w] = '\0';
> > +	return endp - buf;
> > +}

Sebastian