From: Rich Felker <dalias@aerifal.cx>
Date: Sat, 5 Oct 2013 15:59:21 +0000 (-0400)
Subject: fix failure of malloc to set errno on heap (brk) exhaustion
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=a947d317a2769d90bdb19aa11942b7a0680051d5;p=musl

fix failure of malloc to set errno on heap (brk) exhaustion

I wrongly assumed the brk syscall would set errno, but on failure it
returns the old value of the brk rather than an error code.
---

diff --git a/src/malloc/malloc.c b/src/malloc/malloc.c
index fb65ab5b..d6ad9041 100644
--- a/src/malloc/malloc.c
+++ b/src/malloc/malloc.c
@@ -177,6 +177,7 @@ static struct chunk *expand_heap(size_t n)
 	return w;
 fail:
 	unlock(mal.brk_lock);
+	errno = ENOMEM;
 	return 0;
 }