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Date: Mon, 15 Sep 2014 13:07:21 -0400 (EDT) From: David Miller <davem@...emloft.net> To: stephen@...workplumber.org Cc: rickard_strandqvist@...ctrumdigital.se, mlindner@...vell.com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] net: ethernet: marvell: sky2.c: Cleaning up missing null-terminate in conjunction with strncpy From: Stephen Hemminger <stephen@...workplumber.org> Date: Sun, 14 Sep 2014 19:05:57 -0700 > On Sun, 14 Sep 2014 19:33:43 +0200 > Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se> wrote: > >> Replacing strncpy with strlcpy to avoid strings that lacks null terminate. >> >> Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se> >> --- >> drivers/net/ethernet/marvell/sky2.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c >> index dba48a5c..7053d38 100644 >> --- a/drivers/net/ethernet/marvell/sky2.c >> +++ b/drivers/net/ethernet/marvell/sky2.c >> @@ -4907,7 +4907,7 @@ static const char *sky2_name(u8 chipid, char *buf, int sz) >> }; >> >> if (chipid >= CHIP_ID_YUKON_XL && chipid <= CHIP_ID_YUKON_OP_2) >> - strncpy(buf, name[chipid - CHIP_ID_YUKON_XL], sz); >> + strlcpy(buf, name[chipid - CHIP_ID_YUKON_XL], sz); >> else >> snprintf(buf, sz, "(chip %#x)", chipid); >> return buf; > > Useless and unnecessary since the list of names is right there. > Why not avoid the copy all together? > > Subject: sky2: avoid strncpy > > Don't use strncpy() since security thought police think it is bad. > > Signed-off-by: Stephen Hemminger <stephen@...workplumber.org> I think providing the buffer on the stack of the thread executing the probe is superior because it will allow enabling parallel probing in the future. I don't think you have to change that aspect to achieve your goal of returning the const char * string when possible. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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