From b9eeeac5c87591ca43fdb6aaafb521a84d7d3800 Mon Sep 17 00:00:00 2001 From: akr Date: Sat, 13 Jul 2013 15:19:48 +0000 Subject: * bignum.c (big_shift): Avoid signed integer overflow. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41959 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- ChangeLog | 4 ++++ bignum.c | 2 +- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/ChangeLog b/ChangeLog index 4c555d39aa..bcd72e5369 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,7 @@ +Sun Jul 14 00:17:42 2013 Tanaka Akira + + * bignum.c (big_shift): Avoid signed integer overflow. + Sun Jul 14 00:14:15 2013 Tanaka Akira * bignum.c (bary_mul_precheck): Use bary_small_lshift or diff --git a/bignum.c b/bignum.c index a20f8369fd..fb3954624c 100644 --- a/bignum.c +++ b/bignum.c @@ -5283,7 +5283,7 @@ static VALUE big_shift(VALUE x, long n) { if (n < 0) - return big_lshift(x, (unsigned long)-n); + return big_lshift(x, 1+(unsigned long)(-(n+1))); else if (n > 0) return big_rshift(x, (unsigned long)n); return x; -- cgit v1.2.3