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authorKim Alvefur <zash@zash.se>2017-12-03 15:36:20 +0100
committerKim Alvefur <zash@zash.se>2017-12-03 15:36:20 +0100
commit96d9651ece0aeb4045136c8c4e9f978eb1738334 (patch)
tree52afc3e7368a8e6e98c982bf0c11d047a3205d79 /util-src
parentabb425e70f217eb660aadb29885e07a7238b7feb (diff)
downloadprosody-96d9651ece0aeb4045136c8c4e9f978eb1738334.tar.gz
prosody-96d9651ece0aeb4045136c8c4e9f978eb1738334.zip
util.crand: Throw an error for sizes smaller than 1 byte
Diffstat (limited to 'util-src')
-rw-r--r--util-src/crand.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/util-src/crand.c b/util-src/crand.c
index cdc3c211..20871f3e 100644
--- a/util-src/crand.c
+++ b/util-src/crand.c
@@ -69,7 +69,9 @@ int getrandom(void *buf, size_t buflen, unsigned int flags) {
int Lrandom(lua_State *L) {
char smallbuf[SMALLBUFSIZ];
char *buf = &smallbuf[0];
- const size_t len = luaL_checkinteger(L, 1);
+ const lua_Integer l = luaL_checkinteger(L, 1);
+ const size_t len = l;
+ luaL_argcheck(L, l >= 0, 1, "must be > 0");
if(len > SMALLBUFSIZ) {
buf = lua_newuserdata(L, len);