[PATCH v2 6/8] libmultipath: prioritizers/iet: fix possible NULL dereference

[Martin Wilck]

Found by Fedora's static analysis [1].

[1] 
https://openscanhub.fedoraproject.org/task/51915/log/device-mapper-multipath-0.11.1-1.fc43/scan-results.html#def68

Signed-off-by: Martin Wilck <mwi...@suse.com>
Reviewed-by: Benjamin Marzinski <bmarz...@redhat.com>
---
 libmultipath/prioritizers/iet.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libmultipath/prioritizers/iet.c b/libmultipath/prioritizers/iet.c
index f3bf64c..f5fdd42 100644
--- a/libmultipath/prioritizers/iet.c
+++ b/libmultipath/prioritizers/iet.c
@@ -101,6 +101,8 @@ int iet_prio(const char *dev, char * args)
        char buffer[BUFFERSIZE];
        char fullpath[BUFFERSIZE] = "/dev/disk/by-path/";
        dir_p = opendir(fullpath);
+       if (!dir_p)
+               goto out;
 
        // loop to find device in /dev/disk/by-path
        while( NULL != (dir_entry_p = readdir(dir_p))) {
@@ -135,6 +137,7 @@ int iet_prio(const char *dev, char * args)
        }
        // nothing found, low prio
        closedir(dir_p);
+out:
        return 10;
 }
 
-- 
2.49.0