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authorDavidlohr Bueso <dave@gnu.org>2012-10-04 17:13:18 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-06 03:04:57 +0900
commite96875677fb2b7cb739c5d7769824dff7260d31d (patch)
tree4d33caeb4dc7584832945427ed8890b3e5c856db /lib
parent8f1f66ed7e1bdb7c88bb0bc45ac78cd075430d78 (diff)
downloadvexpress-lsk-e96875677fb2b7cb739c5d7769824dff7260d31d.tar.gz
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>
Diffstat (limited to 'lib')
-rw-r--r--lib/gcd.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/gcd.c b/lib/gcd.c
index cce4f3cd14b..3657f129d7b 100644
--- a/lib/gcd.c
+++ b/lib/gcd.c
@@ -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;