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authorRoberto Ierusalimschy <roberto@inf.puc-rio.br>2024-06-24 12:03:59 -0300
committerRoberto Ierusalimschy <roberto@inf.puc-rio.br>2024-06-24 12:03:59 -0300
commitc1dc08e8e8e22af9902a6341b4a9a9a7811954cc (patch)
tree7ce5d6c721bd306f83555d821d6372651e3ab223 /lauxlib.c
parent0f7025dcae08e35a31866234d8d757ab54392190 (diff)
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Length of external strings must fit in Lua integer
(As the length of any string in Lua.)
Diffstat (limited to 'lauxlib.c')
-rw-r--r--lauxlib.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/lauxlib.c b/lauxlib.c
index 99a63092..5aeec55f 100644
--- a/lauxlib.c
+++ b/lauxlib.c
@@ -538,10 +538,12 @@ static void newbox (lua_State *L) {
538*/ 538*/
539static size_t newbuffsize (luaL_Buffer *B, size_t sz) { 539static size_t newbuffsize (luaL_Buffer *B, size_t sz) {
540 size_t newsize = (B->size / 2) * 3; /* buffer size * 1.5 */ 540 size_t newsize = (B->size / 2) * 3; /* buffer size * 1.5 */
541 if (l_unlikely(MAX_SIZET - sz - 1 < B->n)) /* overflow in (B->n + sz + 1)? */ 541 if (l_unlikely(sz > MAX_SIZE - B->n - 1))
542 return luaL_error(B->L, "buffer too large"); 542 return luaL_error(B->L, "resulting string too large");
543 if (newsize < B->n + sz + 1) /* not big enough? */ 543 if (newsize < B->n + sz + 1 || newsize > MAX_SIZE) {
544 /* newsize was not big enough or too big */
544 newsize = B->n + sz + 1; 545 newsize = B->n + sz + 1;
546 }
545 return newsize; 547 return newsize;
546} 548}
547 549