DPDK patches and discussions
 help / color / mirror / Atom feed
* [dpdk-dev] [PATCH] eal/linux: use more restrictive perms in hugedir
@ 2016-08-10 14:52 Robin Jarry
  2016-09-16 12:51 ` Thomas Monjalon
  0 siblings, 1 reply; 2+ messages in thread
From: Robin Jarry @ 2016-08-10 14:52 UTC (permalink / raw)
  To: sergio.gonzalez.monroy; +Cc: dev

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@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

^ permalink raw reply	[flat|nested] 2+ messages in thread

end of thread, other threads:[~2016-09-16 12:51 UTC | newest]

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-08-10 14:52 [dpdk-dev] [PATCH] eal/linux: use more restrictive perms in hugedir Robin Jarry
2016-09-16 12:51 ` Thomas Monjalon

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).