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umh: creds: convert call_usermodehelper_keys() to use subprocess_info->init()

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call_usermodehelper_keys() uses call_usermodehelper_setkeys() to change
subprocess_info->cred in advance.  Now that we have info->init() we can
change this code to set tgcred->session_keyring in context of execing
kernel thread.

Note: since currently call_usermodehelper_keys() is never called with
UMH_NO_WAIT, call_usermodehelper_keys()->key_get() and umh_keys_cleanup()
are not really needed, we could rely on install_session_keyring_to_cred()
which does key_get() on success.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov
2010-05-26 14:43:00 -07:00
committed by Linus Torvalds
parent 898b374af6
commit 685bfd2c48
5 changed files with 34 additions and 37 deletions
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3
security/keys/process_keys.c
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@@ -216,8 +216,7 @@ static int install_process_keyring(void)
/*
* install a session keyring directly to a credentials struct
*/
static int install_session_keyring_to_cred(struct cred *cred,
struct key *keyring)
int install_session_keyring_to_cred(struct cred *cred, struct key *keyring)
{
unsigned long flags;
struct key *old;