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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>
This commit is contained in:
Mickaël Salaün 2024-11-09 12:08:55 +01:00
parent 0c0effb07f
commit 8376226e5f
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GPG Key ID: E5E3D0E88C82F6D2
1 changed files with 6 additions and 22 deletions
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28
security/landlock/net.c
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@ -39,27 +39,9 @@ int landlock_append_net_rule(struct landlock_ruleset *const ruleset,
return err; return err;
} }
static access_mask_t static const struct access_masks any_net = {
get_raw_handled_net_accesses(const struct landlock_ruleset *const domain) .net = ~0,
{ };
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 int current_check_access_socket(struct socket *const sock, static int current_check_access_socket(struct socket *const sock,
struct sockaddr *const address, struct sockaddr *const address,
@ -72,7 +54,9 @@ static int current_check_access_socket(struct socket *const sock,
struct landlock_id id = { struct landlock_id id = {
.type = LANDLOCK_KEY_NET_PORT, .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) if (!dom)
return 0; return 0;