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>
diff --git a/arch/x86/kernel/cpu/match.c b/arch/x86/kernel/cpu/match.c
index 940e2d4..2dfa52b 100644
--- a/arch/x86/kernel/cpu/match.c
+++ b/arch/x86/kernel/cpu/match.c
@@ -67,7 +67,7 @@
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;
}