diff options
| -rw-r--r-- | mem-pool.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/mem-pool.c b/mem-pool.c index 2078c22b09..3065b12b23 100644 --- a/mem-pool.c +++ b/mem-pool.c @@ -115,6 +115,7 @@ static char *mem_pool_strvfmt(struct mem_pool *pool, const char *fmt, size_t available = block ? block->end - block->next_free : 0; va_list cp; int len, len2; + size_t size; char *ret; va_copy(cp, ap); @@ -123,13 +124,14 @@ static char *mem_pool_strvfmt(struct mem_pool *pool, const char *fmt, if (len < 0) BUG("your vsnprintf is broken (returned %d)", len); - ret = mem_pool_alloc(pool, len + 1); /* 1 for NUL */ + size = st_add(len, 1); /* 1 for NUL */ + ret = mem_pool_alloc(pool, size); /* Shortcut; relies on mem_pool_alloc() not touching buffer contents. */ if (ret == next_free) return ret; - len2 = vsnprintf(ret, len + 1, fmt, ap); + len2 = vsnprintf(ret, size, fmt, ap); if (len2 != len) BUG("your vsnprintf is broken (returns inconsistent lengths)"); return ret; |