X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Flinux%2Fsbrk.c;h=5fab74be29c83d729c5718d13f5106a1cd9be41d;hb=2f0c415cebfedff0e4eb49b743a591a4c15d454e;hp=b2943a9239533967b1f8468dc607804b31335b0d;hpb=aa398f56fa398f2202b04e82c67f822f3233786f;p=musl

diff --git a/src/linux/sbrk.c b/src/linux/sbrk.c
index b2943a92..5fab74be 100644
--- a/src/linux/sbrk.c
+++ b/src/linux/sbrk.c
@@ -3,5 +3,7 @@
 
 void *sbrk(ptrdiff_t inc)
 {
-	return (void *)syscall(SYS_brk, syscall(SYS_brk, 0)+inc);
+	unsigned long cur = syscall(SYS_brk, 0);
+	if (inc && syscall(SYS_brk, cur+inc) != cur+inc) return (void *)-1;
+	return (void *)cur;
 }