[PATCH 1/5] Mount sys before trying to mount selinuxfs

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If /sys is not present, the attempt to mount selinuxfs will of course
fail. So we try to mount /sys first (and only if that fails fall back to
the /selinux mount point) and then try to mount selinuxfs.

Signed-off-by: Sven Vermeulen <sven.vermeulen@xxxxxxxxx>
---
 libselinux/src/load_policy.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/libselinux/src/load_policy.c b/libselinux/src/load_policy.c
index 10e29b9..e419f1a 100644
--- a/libselinux/src/load_policy.c
+++ b/libselinux/src/load_policy.c
@@ -370,8 +370,16 @@ int selinux_init_load_policy(int *enforce)
 	 * mount it if present for use in the calls below.  
 	 */
 	const char *mntpoint = NULL;
-	if (mount(SELINUXFS, SELINUXMNT, SELINUXFS, 0, 0) == 0 || errno == EBUSY) {
-		mntpoint = SELINUXMNT;
+	/* First make sure /sys is mounted */
+	if (mount("sysfs", "/sys", "sysfs", 0, 0) == 0 || errno == EBUSY) {
+		if (mount(SELINUXFS, SELINUXMNT, SELINUXFS, 0, 0) == 0 || errno == EBUSY) {
+			mntpoint = SELINUXMNT;
+		} else {
+			/* check old mountpoint */
+			if (mount(SELINUXFS, OLDSELINUXMNT, SELINUXFS, 0, 0) == 0 || errno == EBUSY) {
+				mntpoint = OLDSELINUXMNT;
+			}
+		}
 	} else {
 		/* check old mountpoint */
 		if (mount(SELINUXFS, OLDSELINUXMNT, SELINUXFS, 0, 0) == 0 || errno == EBUSY) {
-- 
1.8.1.5


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