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* random.c (limited_big_rand): fix buffer overflow when SIZEOF_BDIGITS

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is 2.  fixed by Kenta Murata.  [ruby-dev:33565]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15365 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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akr 2008-02-02 00:32:40 +00:00
parent cb355eebf0
commit b5fdd1bd76
2 changed files with 15 additions and 6 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Sat Feb 2 09:28:36 2008 Tanaka Akira <akr@fsij.org>
* random.c (limited_big_rand): fix buffer overflow when SIZEOF_BDIGITS
is 2. fixed by Kenta Murata. [ruby-dev:33565]
Fri Feb 1 21:42:37 2008 Nobuyoshi Nakada <nobu@ruby-lang.org>
* configure.in (darwin): _XOPEN_SOURCE is necessary to make ucontext_t

16
random.c
View file

@ -385,12 +385,16 @@ limited_big_rand(struct RBignum *limit)
val = (struct RBignum *)rb_big_clone((VALUE)limit);
RBIGNUM_SET_SIGN(val, 1);
#if SIZEOF_BDIGITS == 2
# define BIG_GET32(big,i) (RBIGNUM_DIGITS(big)[(i)*2] | \
((i)*2+1 < RBIGNUM_DIGITS(big) ? (RBIGNUM_DIGITS(big)[(i)*2+1] << 16) \
: 0))
# define BIG_SET32(big,i,d) ((RBIGNUM_DIGITS(big)[(i)*2] = (d) & 0xffff), \
((i)*2+1 < RBIGNUM_DIGITS(big) ? (RBIGNUM_DIGITS(big)[(i)*2+1] = (d) >> 16) \
: 0))
# define BIG_GET32(big,i) \
(RBIGNUM_DIGITS(big)[(i)*2] | \
((i)*2+1 < RBIGNUM_LEN(big) ? \
(RBIGNUM_DIGITS(big)[(i)*2+1] << 16) : \
0))
# define BIG_SET32(big,i,d) \
((RBIGNUM_DIGITS(big)[(i)*2] = (d) & 0xffff), \
((i)*2+1 < RBIGNUM_LEN(big) ? \
(RBIGNUM_DIGITS(big)[(i)*2+1] = (d) >> 16) : \
0))
#else
/* SIZEOF_BDIGITS == 4 */
# define BIG_GET32(big,i) (RBIGNUM_DIGITS(big)[i])