...don't assume that it's in /etc/krb5.keytab.

Reported-by: Konstantin Lepikhov <[email protected]>
Signed-off-by: Jeff Layton <[email protected]>
---
 cifs.upcall.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/cifs.upcall.c b/cifs.upcall.c
index cc65824d3689..e8544c2b68ad 100644
--- a/cifs.upcall.c
+++ b/cifs.upcall.c
@@ -55,7 +55,6 @@
 #define        CIFS_DEFAULT_KRB5_DIR           "/tmp"
 #define        CIFS_DEFAULT_KRB5_USER_DIR      "/run/user/%U"
 #define        CIFS_DEFAULT_KRB5_PREFIX        "krb5cc"
-#define CIFS_DEFAULT_KRB5_KEYTAB       "/etc/krb5.keytab"
 
 #define        MAX_CCNAME_LEN                  PATH_MAX + 5
 
@@ -205,9 +204,15 @@ init_cc_from_keytab(const char *keytab_name, const char 
*user)
                goto icfk_cleanup;
        }
 
-       ret = krb5_kt_resolve(context, keytab_name, &keytab);
+       if (keytab_name)
+               ret = krb5_kt_resolve(context, keytab_name, &keytab);
+       else
+               ret = krb5_kt_default(context, &keytab);
+
        if (ret) {
-               syslog(LOG_DEBUG, "krb5_kt_resolve: %d", (int)ret);
+               syslog(LOG_DEBUG, "%s: %d",
+                       keytab_name ? "krb5_kt_resolve" : "krb5_kt_default",
+                       (int)ret);
                goto icfk_cleanup;
        }
 
@@ -841,7 +846,7 @@ int main(const int argc, char *const argv[])
        struct decoded_args arg;
        const char *oid;
        uid_t uid;
-       char *keytab_name = CIFS_DEFAULT_KRB5_KEYTAB;
+       char *keytab_name = NULL;
        time_t best_time = 0;
 
        hostbuf[0] = '\0';
-- 
1.9.0

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