From 8376226e5f53e78cd16a2b23577304e43acb3ba4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micka=C3=ABl=20Sala=C3=BCn?= <mic@digikod.net>
Date: Sat, 9 Nov 2024 12:08:55 +0100
Subject: [PATCH] landlock: Refactor network access mask management
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Replace get_raw_handled_net_accesses() and get_current_net_domain() with
a call to landlock_get_applicable_domain().
Cc: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
Cc: Mikhail Ivanov <ivanov.mikhail1@huawei-partners.com>
Reviewed-by: Günther Noack <gnoack@google.com>
Link: https://lore.kernel.org/r/20241109110856.222842-3-mic@digikod.net
Signed-off-by: Mickaël Salaün <mic@digikod.net>
---
security/landlock/net.c | 28 ++++++----------------------
1 file changed, 6 insertions(+), 22 deletions(-)
diff --git a/security/landlock/net.c b/security/landlock/net.c
index c8bcd29bde095..d5dcc4407a197 100644
--- a/security/landlock/net.c
+++ b/security/landlock/net.c
@@ -39,27 +39,9 @@ int landlock_append_net_rule(struct landlock_ruleset *const ruleset,
return err;
}
-static access_mask_t
-get_raw_handled_net_accesses(const struct landlock_ruleset *const domain)
-{
- access_mask_t access_dom = 0;
- size_t layer_level;
-
- for (layer_level = 0; layer_level < domain->num_layers; layer_level++)
- access_dom |= landlock_get_net_access_mask(domain, layer_level);
- return access_dom;
-}
-
-static const struct landlock_ruleset *get_current_net_domain(void)
-{
- const struct landlock_ruleset *const dom =
- landlock_get_current_domain();
-
- if (!dom || !get_raw_handled_net_accesses(dom))
- return NULL;
-
- return dom;
-}
+static const struct access_masks any_net = {
+ .net = ~0,
+};
static int current_check_access_socket(struct socket *const sock,
struct sockaddr *const address,
@@ -72,7 +54,9 @@ static int current_check_access_socket(struct socket *const sock,
struct landlock_id id = {
.type = LANDLOCK_KEY_NET_PORT,
};
- const struct landlock_ruleset *const dom = get_current_net_domain();
+ const struct landlock_ruleset *const dom =
+ landlock_get_applicable_domain(landlock_get_current_domain(),
+ any_net);
if (!dom)
return 0;
--
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