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integrity: Fix memory leakage in keyring allocation error path

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[ Upstream commit 39419ef7af ]

Key restriction is allocated in integrity_init_keyring(). However, if
keyring allocation failed, it is not freed, causing memory leaks.

Fixes: 2b6aa412ff ("KEYS: Use structure to capture key restriction function and data")
Signed-off-by: GUO Zihua <guozihua@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
GUO Zihua 2022-11-11 18:13:17 +08:00 • committed by Justin Hammond
parent db75248653
commit 8f40de263d
1 changed files with 5 additions and 1 deletions
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6
security/integrity/digsig.c
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@ -122,6 +122,7 @@ int __init integrity_init_keyring(const unsigned int id)
{ {
struct key_restriction *restriction; struct key_restriction *restriction;
key_perm_t perm; key_perm_t perm;
int ret;
perm = (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW perm = (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW
| KEY_USR_READ | KEY_USR_SEARCH; | KEY_USR_READ | KEY_USR_SEARCH;
@ -142,7 +143,10 @@ int __init integrity_init_keyring(const unsigned int id)
perm |= KEY_USR_WRITE; perm |= KEY_USR_WRITE;
out: out:
return __integrity_init_keyring(id, perm, restriction); ret = __integrity_init_keyring(id, perm, restriction);
if (ret)
kfree(restriction);
return ret;
} }
static int __init integrity_add_key(const unsigned int id, const void *data, static int __init integrity_add_key(const unsigned int id, const void *data,