sysctl: Warn on an empty procname element

Add a pr_err warning in case a ctl_table is registered with a sentinel
element containing a NULL procname.

Signed-off-by: Joel Granados <j.granados@samsung.com>

diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 87396f9d599dbff5fcc7e384eb9afbbd8604caee..9553e77c9d3189fdb14546b93b80d0c49e16238e 100644 (file)
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -1131,6 +1131,8 @@ static int sysctl_check_table(const char *path, struct ctl_table_header *header)
        struct ctl_table *entry;
        int err = 0;
        list_for_each_table_entry(entry, header) {
+               if (!entry->procname)
+                       err |= sysctl_err(path, entry, "procname is null");
                if ((entry->proc_handler == proc_dostring) ||
                    (entry->proc_handler == proc_dobool) ||
                    (entry->proc_handler == proc_dointvec) ||