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lsm: infrastructure management of the infiniband blob

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Move management of the infiniband security blob out of the individual
security modules and into the LSM infrastructure.  The security modules
tell the infrastructure how much space they require at initialization.
There are no longer any modules that require the ib_free() hook.
The hook definition has been removed.

Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Reviewed-by: John Johansen <john.johansen@canonical.com>
[PM: subject tweak, selinux style fixes]
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Casey Schaufler
2024-07-10 14:32:29 -07:00
committed by Paul Moore
parent a39c0f77db
commit 66de33a0bb
5 changed files with 25 additions and 17 deletions
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17
security/security.c
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@@ -219,6 +219,7 @@ static void __init lsm_set_blob_sizes(struct lsm_blob_sizes *needed)
lsm_set_blob_size(&needed->lbs_cred, &blob_sizes.lbs_cred);
lsm_set_blob_size(&needed->lbs_file, &blob_sizes.lbs_file);
lsm_set_blob_size(&needed->lbs_ib, &blob_sizes.lbs_ib);
/*
* The inode blob gets an rcu_head in addition to
* what the modules might need.
@@ -402,6 +403,7 @@ static void __init ordered_lsm_init(void)
init_debug("cred blob size = %d\n", blob_sizes.lbs_cred);
init_debug("file blob size = %d\n", blob_sizes.lbs_file);
init_debug("ib blob size = %d\n", blob_sizes.lbs_ib);
init_debug("inode blob size = %d\n", blob_sizes.lbs_inode);
init_debug("ipc blob size = %d\n", blob_sizes.lbs_ipc);
#ifdef CONFIG_KEYS
@@ -5096,7 +5098,18 @@ EXPORT_SYMBOL(security_ib_endport_manage_subnet);
*/
int security_ib_alloc_security(void **sec)
{
return call_int_hook(ib_alloc_security, sec);
int rc;
rc = lsm_blob_alloc(sec, blob_sizes.lbs_ib, GFP_KERNEL);
if (rc)
return rc;
rc = call_int_hook(ib_alloc_security, *sec);
if (rc) {
kfree(*sec);
*sec = NULL;
}
return rc;
}
EXPORT_SYMBOL(security_ib_alloc_security);
@@ -5108,7 +5121,7 @@ EXPORT_SYMBOL(security_ib_alloc_security);
*/
void security_ib_free_security(void *sec)
{
call_void_hook(ib_free_security, sec);
kfree(sec);
}
EXPORT_SYMBOL(security_ib_free_security);
#endif /* CONFIG_SECURITY_INFINIBAND */