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x86/cpu: Fix overrun check in arch_print_cpu_modalias() 

snprintf() does not return a negative value when truncating.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Acked-by: Thomas Renninger <trenn@suse.de>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ben Hutchings 2012-02-11 22:56:59 +00:00 committed by Greg Kroah-Hartman
parent da5a70f351
commit 70142a9dd1
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kernel/cpu/match.c
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@ -67,7 +67,7 @@ ssize_t arch_print_cpu_modalias(struct device *dev,
for (i = 0; i < NCAPINTS*32; i++) {
if (boot_cpu_has(i)) {
n = snprintf(buf, size, ",%04X", i);
if (n < 0) {
if (n >= size) {
WARN(1, "x86 features overflow page\n");
break;
}