From: Rich Felker <dalias@aerifal.cx>
Date: Wed, 11 Apr 2012 03:05:16 +0000 (-0400)
Subject: fix potential overflow in exponent reading
X-Git-Tag: v0.8.8~48
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=633a26c1e69b6a977d16086834f2b937e0378002;p=oweals%2Fmusl.git

fix potential overflow in exponent reading

note that there's no need for a precise cutoff, because exponents this
large will always result in overflow or underflow (it's impossible to
read enough digits to compensate for the exponent magnitude; even at a
few nanoseconds per digit it would take hundreds of years).
---

diff --git a/src/internal/floatscan.c b/src/internal/floatscan.c
index 3875719b..ed735278 100644
--- a/src/internal/floatscan.c
+++ b/src/internal/floatscan.c
@@ -44,7 +44,7 @@ static long long scanexp(FILE *f, int pok)
 	}
 	for (x=0; c-'0'<10U && x<INT_MAX/10; c = shgetc(f))
 		x = 10*x + c-'0';
-	for (y=x; c-'0'<10U && x<LLONG_MAX/10; c = shgetc(f))
+	for (y=x; c-'0'<10U && x<LLONG_MAX/100; c = shgetc(f))
 		y = 10*y + c-'0';
 	for (; c-'0'<10U; c = shgetc(f));
 	shunget(f);