diff options
| -rw-r--r-- | security/landlock/fs.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/security/landlock/fs.c b/security/landlock/fs.c index 4eb972f2292f..110b8cfaab9c 100644 --- a/security/landlock/fs.c +++ b/security/landlock/fs.c @@ -565,6 +565,12 @@ static void test_no_more_access(struct kunit *const test) #undef NMA_TRUE #undef NMA_FALSE +static bool is_layer_masks_allowed( + layer_mask_t (*const layer_masks)[LANDLOCK_NUM_ACCESS_FS]) +{ + return !memchr_inv(layer_masks, 0, sizeof(*layer_masks)); +} + /* * Removes @layer_masks accesses that are not requested. * @@ -582,7 +588,8 @@ scope_to_request(const access_mask_t access_request, for_each_clear_bit(access_bit, &access_req, ARRAY_SIZE(*layer_masks)) (*layer_masks)[access_bit] = 0; - return !memchr_inv(layer_masks, 0, sizeof(*layer_masks)); + + return is_layer_masks_allowed(layer_masks); } #ifdef CONFIG_SECURITY_LANDLOCK_KUNIT_TEST @@ -771,9 +778,14 @@ static bool is_access_to_paths_allowed( if (WARN_ON_ONCE(domain->num_layers < 1 || !layer_masks_parent1)) return false; + allowed_parent1 = is_layer_masks_allowed(layer_masks_parent1); + if (unlikely(layer_masks_parent2)) { if (WARN_ON_ONCE(!dentry_child1)) return false; + + allowed_parent2 = is_layer_masks_allowed(layer_masks_parent2); + /* * For a double request, first check for potential privilege * escalation by looking at domain handled accesses (which are |