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landlock: Simplify current_check_access_socket()

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Remove the handled_access variable in current_check_access_socket() and
update access_request instead.  One up-to-date variable avoids picking
the wrong one.

Cc: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
Link: https://lore.kernel.org/r/20240307093923.1466071-1-mic@digikod.net
Signed-off-by: Mickaël Salaün <mic@digikod.net>
This commit is contained in:
Mickaël Salaün 2024-03-07 10:39:22 +01:00
parent 782191c748
commit 088e2efaf3
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GPG key ID: E5E3D0E88C82F6D2
1 changed files with 3 additions and 4 deletions
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7
security/landlock/net.c
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@ -64,12 +64,11 @@ static const struct landlock_ruleset *get_current_net_domain(void)
static int current_check_access_socket(struct socket *const sock,
struct sockaddr *const address,
const int addrlen,
const access_mask_t access_request)
access_mask_t access_request)
{
__be16 port;
layer_mask_t layer_masks[LANDLOCK_NUM_ACCESS_NET] = {};
const struct landlock_rule *rule;
access_mask_t handled_access;
struct landlock_id id = {
.type = LANDLOCK_KEY_NET_PORT,
};
@ -164,9 +163,9 @@ static int current_check_access_socket(struct socket *const sock,
BUILD_BUG_ON(sizeof(port) > sizeof(id.key.data));
rule = landlock_find_rule(dom, id);
handled_access = landlock_init_layer_masks(
access_request = landlock_init_layer_masks(
dom, access_request, &layer_masks, LANDLOCK_KEY_NET_PORT);
if (landlock_unmask_layers(rule, handled_access, &layer_masks,
if (landlock_unmask_layers(rule, access_request, &layer_masks,
ARRAY_SIZE(layer_masks)))
return 0;