From: Sami Tolvanen <samitolvanen@google.com>
To: David Howells <dhowells@redhat.com>,
James Morris <jamorris@linux.microsoft.com>,
Kees Cook <keescook@chromium.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
KP Singh <kpsingh@google.com>,
Casey Schaufler <casey@schaufler-ca.com>,
Thomas Cedeno <thomascedeno@google.com>,
Anders Roxell <anders.roxell@linaro.org>
Cc: linux-kernel@vger.kernel.org, Sami Tolvanen <samitolvanen@google.com>
Subject: [PATCH] security: fix the key_permission LSM hook function type
Date: Mon, 15 Jun 2020 11:12:32 -0700 [thread overview]
Message-ID: <20200615181232.119491-1-samitolvanen@google.com> (raw)
Commit 8c0637e950d6 ("keys: Make the KEY_NEED_* perms an enum rather than
a mask") changed the type of the key_permission callback functions, but
didn't change the type of the hook, which trips indirect call checking with
Control-Flow Integrity (CFI). This change fixes the issue by changing the
hook type to match the functions.
Fixes: 8c0637e950d6 ("keys: Make the KEY_NEED_* perms an enum rather than a mask")
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
---
include/linux/lsm_hook_defs.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h
index 6791813cd439..24f6683f1cfc 100644
--- a/include/linux/lsm_hook_defs.h
+++ b/include/linux/lsm_hook_defs.h
@@ -360,7 +360,7 @@ LSM_HOOK(int, 0, key_alloc, struct key *key, const struct cred *cred,
unsigned long flags)
LSM_HOOK(void, LSM_RET_VOID, key_free, struct key *key)
LSM_HOOK(int, 0, key_permission, key_ref_t key_ref, const struct cred *cred,
- unsigned perm)
+ enum key_need_perm need_perm)
LSM_HOOK(int, 0, key_getsecurity, struct key *key, char **_buffer)
#endif /* CONFIG_KEYS */
base-commit: b3a9e3b9622ae10064826dccb4f7a52bd88c7407
--
2.27.0.290.gba653c62da-goog
next reply other threads:[~2020-06-15 18:12 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-15 18:12 Sami Tolvanen [this message]
2020-06-15 18:21 ` [PATCH] security: fix the key_permission LSM hook function type Kees Cook
2020-06-15 18:23 ` Nick Desaulniers
2020-06-15 18:47 ` Kees Cook
2020-06-21 5:54 ` Kees Cook
2020-06-22 17:38 ` James Morris
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