klibc - Apr 2021 - [klibc:master] malloc: Set errno on failure

Commit-ID:  7f6626d12daa2f1efd9953d1f4ba2065348dc5cd
Gitweb:    
http://git.kernel.org/?p=libs/klibc/klibc.git;a=commit;h=7f6626d12daa2f1efd9953d1f4ba2065348dc5cd
Author:     Ben Hutchings <ben at decadent.org.uk>
AuthorDate: Wed, 28 Apr 2021 03:57:39 +0200
Committer:  Ben Hutchings <ben at decadent.org.uk>
CommitDate: Wed, 28 Apr 2021 04:43:03 +0200

[klibc] malloc: Set errno on failure

malloc() is specified to set errno = ENOMEM on failure, so do that.

Signed-off-by: Ben Hutchings <ben at decadent.org.uk>

---
 usr/klibc/malloc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/usr/klibc/malloc.c b/usr/klibc/malloc.c
index 413b7337..bb57c9f6 100644
--- a/usr/klibc/malloc.c
+++ b/usr/klibc/malloc.c
@@ -8,6 +8,7 @@
 #include <unistd.h>
 #include <sys/mman.h>
 #include <assert.h>
+#include <errno.h>
 #include "malloc.h"
 
 /* Both the arena list and the free memory list are double linked
@@ -169,6 +170,7 @@ void *malloc(size_t size)
 #endif
 
 	if (fp == (struct free_arena_header *)MAP_FAILED) {
+		errno = ENOMEM;
 		return NULL;	/* Failed to get a block */
 	}