fix overread (consuming an extra byte) scanning NAN

bug detected by glib test suite

fix overread (consuming an extra byte) scanning NAN
bug detected by glib test suite
33e7781b · Rich Felker · c6131259 · 33e7781b
隐藏空白更改
内联并排

Showing with 1 addition and 1 deletion

src/internal/floatscan.c src/internal/floatscan.c +1 -1

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--- a/src/internal/floatscan.c
+++ b/src/internal/floatscan.c
@@ -436,7 +436,7 @@ long double __floatscan(FILE *f, int prec, int pok)
 		return sign * INFINITY;
 	}
 	if (!i) for (i=0; i<3 && (c|32)=="nan"[i]; i++)
-		if (i<3) c = shgetc(f);
+		if (i<2) c = shgetc(f);
 	if (i==3) {
 		return NAN;
 	}