From d1507646975cbf6c3e511ba07b193f27f032d108 Mon Sep 17 00:00:00 2001 From: Szabolcs Nagy Date: Sun, 31 Jan 2016 17:31:03 +0100 Subject: [PATCH] fix malloc_usable_size for NULL input the linux man page specifies malloc_usable_size(0) to return 0 and this is the semantics other implementations follow (jemalloc). reported by Alexander Monakov. --- src/malloc/malloc_usable_size.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/malloc/malloc_usable_size.c b/src/malloc/malloc_usable_size.c index 8cccd9d8..6743ea77 100644 --- a/src/malloc/malloc_usable_size.c +++ b/src/malloc/malloc_usable_size.c @@ -13,5 +13,5 @@ struct chunk { size_t malloc_usable_size(void *p) { - return CHUNK_SIZE(MEM_TO_CHUNK(p)) - OVERHEAD; + return p ? CHUNK_SIZE(MEM_TO_CHUNK(p)) - OVERHEAD : 0; } -- 2.25.1