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author卜部昌平 <shyouhei@ruby-lang.org>2019-10-07 16:56:08 +0900
committer卜部昌平 <shyouhei@ruby-lang.org>2019-10-09 12:12:28 +0900
commit7e0ae1698d4db0baec858a46de8d1ae875360cf5 (patch)
tree646fbe720b13469679973060b8ab5299cf076236 /encoding.c
parenta220410be70264a0e4089c4d63a9c22dd688ca7c (diff)
downloadruby-7e0ae1698d4db0baec858a46de8d1ae875360cf5.tar.gz
avoid overflow in integer multiplication
This changeset basically replaces `ruby_xmalloc(x * y)` into `ruby_xmalloc2(x, y)`. Some convenient functions are also provided for instance `rb_xmalloc_mul_add(x, y, z)` which allocates x * y + z byes.
Diffstat (limited to 'encoding.c')
-rw-r--r--encoding.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/encoding.c b/encoding.c
index d6fc9349db..22fa5eec60 100644
--- a/encoding.c
+++ b/encoding.c
@@ -266,7 +266,7 @@ enc_table_expand(int newsize)
if (enc_table.size >= newsize) return newsize;
newsize = (newsize + 7) / 8 * 8;
- ent = xrealloc(enc_table.list, sizeof(*enc_table.list) * newsize);
+ ent = REALLOC_N(enc_table.list, struct rb_encoding_entry, newsize);
memset(ent + enc_table.size, 0, sizeof(*ent)*(newsize - enc_table.size));
enc_table.list = ent;
enc_table.size = newsize;