From: Seth Howell <seth.howell@intel.com>
Date: Mon, 28 Aug 2017 21:49:12 +0000 (-0700)
Subject: mem: check mmap failure
X-Git-Tag: spdx-start~1678
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=7485e06c2afb6baba38ce03228638aed8d903c62;p=dpdk.git

mem: check mmap failure

If mmap fails, it will return the value MAP_FAILED. Checking for this
return code allows us to properly identify mmap failures and report
them as such to the calling function.

Signed-off-by: Seth Howell <seth.howell@intel.com>
Acked-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>
---

diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index e2ea120d2e..28bca49520 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -685,6 +685,8 @@ create_shared_memory(const char *filename, const size_t mem_size)
 	}
 	retval = mmap(NULL, mem_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
 	close(fd);
+	if (retval == MAP_FAILED)
+		return NULL;
 	return retval;
 }