[PATCH v2 2/2] security: keys: Replace time_t with time64_t for struct key_preparsed_payload

[Baolin Wang]

The 'struct key_preparsed_payload' will use 'time_t' which we will
try to remove in the kernel, since 'time_t' is not year 2038 safe on
32bits systems.

Thus this patch replaces 'time_t' with 'time64_t' which is year 2038
safe on 32 bits system for 'struct key_preparsed_payload', moreover
we should use the 'TIME64_MAX' macro to initialize the 'time64_t'
type variable.

Signed-off-by: Baolin Wang <baolin.w...@linaro.org>
Reviewed-by: Arnd Bergmann <a...@arndb.de>
---
 include/linux/key-type.h |    2 +-
 security/keys/key.c      |    8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/include/linux/key-type.h b/include/linux/key-type.h
index 9520fc3..05d8fb5 100644
--- a/include/linux/key-type.h
+++ b/include/linux/key-type.h
@@ -44,7 +44,7 @@ struct key_preparsed_payload {
        const void      *data;          /* Raw data */
        size_t          datalen;        /* Raw datalen */
        size_t          quotalen;       /* Quota length for proposed payload */
-       time_t          expiry;         /* Expiry time of key */
+       time64_t        expiry;         /* Expiry time of key */
 } __randomize_layout;
 
 typedef int (*request_key_actor_t)(struct key_construction *key,
diff --git a/security/keys/key.c b/security/keys/key.c
index 291a67c..d5c8941 100644
--- a/security/keys/key.c
+++ b/security/keys/key.c
@@ -446,7 +446,7 @@ static int __key_instantiate_and_link(struct key *key,
                        if (authkey)
                                key_revoke(authkey);
 
-                       if (prep->expiry != TIME_T_MAX) {
+                       if (prep->expiry != TIME64_MAX) {
                                key->expiry = prep->expiry;
                                key_schedule_gc(prep->expiry + key_gc_delay);
                        }
@@ -492,7 +492,7 @@ int key_instantiate_and_link(struct key *key,
        prep.data = data;
        prep.datalen = datalen;
        prep.quotalen = key->type->def_datalen;
-       prep.expiry = TIME_T_MAX;
+       prep.expiry = TIME64_MAX;
        if (key->type->preparse) {
                ret = key->type->preparse(&prep);
                if (ret < 0)
@@ -834,7 +834,7 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref,
        prep.data = payload;
        prep.datalen = plen;
        prep.quotalen = index_key.type->def_datalen;
-       prep.expiry = TIME_T_MAX;
+       prep.expiry = TIME64_MAX;
        if (index_key.type->preparse) {
                ret = index_key.type->preparse(&prep);
                if (ret < 0) {
@@ -968,7 +968,7 @@ int key_update(key_ref_t key_ref, const void *payload, 
size_t plen)
        prep.data = payload;
        prep.datalen = plen;
        prep.quotalen = key->type->def_datalen;
-       prep.expiry = TIME_T_MAX;
+       prep.expiry = TIME64_MAX;
        if (key->type->preparse) {
                ret = key->type->preparse(&prep);
                if (ret < 0)
-- 
1.7.9.5