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KEYS: use kmemdup() in request_key_auth_new()

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kmemdup() is preferred to kmalloc() followed by memcpy().

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
Eric Biggers 2017-09-21 13:57:42 -07:00 committed by David Howells
parent 4aa68e07d8
commit e007ce9c59
1 changed files with 2 additions and 3 deletions
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5
security/keys/request_key_auth.c
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@ -163,9 +163,10 @@ struct key *request_key_auth_new(struct key *target, const void *callout_info,
rka = kzalloc(sizeof(*rka), GFP_KERNEL);
if (!rka)
goto error;
rka->callout_info = kmalloc(callout_len, GFP_KERNEL);
rka->callout_info = kmemdup(callout_info, callout_len, GFP_KERNEL);
if (!rka->callout_info)
goto error_free_rka;
rka->callout_len = callout_len;
/* see if the calling process is already servicing the key request of
* another process */
@ -196,8 +197,6 @@ struct key *request_key_auth_new(struct key *target, const void *callout_info,
rka->target_key = key_get(target);
rka->dest_keyring = key_get(dest_keyring);
memcpy(rka->callout_info, callout_info, callout_len);
rka->callout_len = callout_len;
/* allocate the auth key */
sprintf(desc, "%x", target->serial);