There is no need for the page files to be readable (and executable) by
other users. This can be exploited by non-privileged users to access the
working memory of a DPDK app.
Open the files with 0600.
Signed-off-by: Robin Jarry <robin.jarry at 6wind.com>
---
lib/librte_eal/linuxapp/eal/eal_memory.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c
b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 41e0a9288765..3eb72657085c 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -442,7 +442,7 @@ map_all_hugepages(struct hugepage_file *hugepg_tbl,
#endif
/* try to create hugepage file */
- fd = open(hugepg_tbl[i].filepath, O_CREAT | O_RDWR, 0755);
+ fd = open(hugepg_tbl[i].filepath, O_CREAT | O_RDWR, 0600);
if (fd < 0) {
RTE_LOG(DEBUG, EAL, "%s(): open failed: %s\n", __func__,
strerror(errno));
@@ -581,7 +581,7 @@ remap_all_hugepages(struct hugepage_file *hugepg_tbl,
struct hugepage_info *hpi)
hugepg_tbl[page_idx].file_id);
/* try to create hugepage file */
- fd = open(filepath, O_CREAT | O_RDWR, 0755);
+ fd = open(filepath, O_CREAT | O_RDWR, 0600);
if (fd < 0) {
RTE_LOG(ERR, EAL, "%s(): open failed: %s\n", __func__,
strerror(errno));
return -1;
--
2.1.4
