[PATCH v3 3/3] eal/linux: check hugepage access permissions

[Jake Freeland]

Currently, hugepage mountpoints will be used irrespective of permissions,
leading to potential EACCES errors during memory allocation. Fix this by
not using a mountpoint if we do not have read/write permissions on it.

Signed-off-by: Jake Freeland <jfree at FreeBSD.org>
---
 lib/eal/linux/eal_hugepage_info.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/eal/linux/eal_hugepage_info.c b/lib/eal/linux/eal_hugepage_info.c
index d47a19c56a..350c7d8cf6 100644
--- a/lib/eal/linux/eal_hugepage_info.c
+++ b/lib/eal/linux/eal_hugepage_info.c
@@ -260,6 +260,13 @@ get_hugepage_dir(uint64_t hugepage_sz, char *hugedir, int len)
 				continue;
 		}
 
+		if (access(splitstr[MOUNTPT], R_OK | W_OK) < 0) {
+			EAL_LOG(NOTICE,
+				"Skipping hugepage directory '%s': missing R/W permissions"
+				splitstr[MOUNTPT]);
+			continue;
+		}
+
 		/*
 		 * If no --huge-dir option has been given, we're done.
 		 */
-- 
2.51.0