Commit e9687567 authored Oct 04, 2012 by Davidlohr Bueso Committed by Linus Torvalds Oct 06, 2012

lib/gcd.c: prevent possible div by 0



Account for all properties when a and/or b are 0:
gcd(0, 0) = 0
gcd(a, 0) = a
gcd(0, b) = b

Fixes no known problems in current kernels.

Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 8f1f66ed

lib/gcd.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -9,6 +9,9 @@ unsigned long gcd(unsigned long a, unsigned long b)

		if (a < b)
		swap(a, b);

		if (!b)
		return a;
		while ((r = a % b) != 0) {
		a = b;
		b = r;

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