security: keys: Replace time_t/timespec with time64_t

The 'struct key' will use 'time_t' which we try to remove in the
kernel, since 'time_t' is not year 2038 safe on 32bit systems.
Also the 'struct keyring_search_context' will use 'timespec' type
to record current time, which is also not year 2038 safe on 32bit
systems.

Thus this patch replaces 'time_t' with 'time64_t' which is year 2038
safe for 'struct key', and replace 'timespec' with 'time64_t' for the
'struct keyring_search_context', since we only look at the the seconds
part of 'timespec' variable. Moreover we also change the codes where
using the 'time_t' and 'timespec', and we can get current time by
ktime_get_real_seconds() instead of current_kernel_time(), and use
'TIME64_MAX' macro to initialize the 'time64_t' type variable.

Especially in proc.c file, we have replaced 'unsigned long' and 'timespec'
type with 'u64' and 'time64_t' type to save the timeout value, which means
user will get one 'u64' type timeout value by issuing proc_keys_show()
function.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: James Morris <james.l.morris@oracle.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index 740affd65ee9..d5b25e535d3a 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -738,7 +738,7 @@ try_again:
 	if (ret < 0)
 		goto invalid_key;
 
-	key->last_used_at = current_kernel_time().tv_sec;
+	key->last_used_at = ktime_get_real_seconds();
 
 error:
 	put_cred(ctx.cred);