Catch various cases in libpayload where malloc() or memalign() return NULL

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Peter Stuge <peter@stuge.se>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4474 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

payloads/libpayload/libc/lar.c

@@ -113,6 +113,10 @@ struct LAR *openlar(void *addr)
 	 * tear on the heap */
 
 	lar->headers = malloc(16 * sizeof(void *));
+
+	if (!lar->headers)
+		return NULL;
+
 	lar->alloc = 16;
 	lar->count = lar->eof = 0;
 	lar->cindex = 0;

payloads/libpayload/libc/malloc.c

@@ -309,6 +309,8 @@ void *memalign(size_t align, size_t size)
 	if (size == 0) return 0;
 	if (align_regions == 0) {
 		align_regions = malloc(sizeof(struct align_region_t));
+		if (align_regions == NULL)
+			return NULL;
 		memset(align_regions, 0, sizeof(struct align_region_t));
 	}
 	struct align_region_t *reg = align_regions;

payloads/libpayload/libc/readline.c

@@ -55,6 +55,8 @@ char *readline(const char *prompt)
 	if (!readline_buffer || !readline_bufferlen) {
 #define READLINE_BUFFERSIZE	256
 		readline_buffer = malloc(READLINE_BUFFERSIZE);
+		if (!readline_buffer)
+			return NULL;
 		readline_bufferlen = READLINE_BUFFERSIZE;
 		memset(readline_buffer, 0, readline_bufferlen);
 	}