diff options
Diffstat (limited to 'security/landlock/setup.c')
| -rw-r--r-- | security/landlock/setup.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/security/landlock/setup.c b/security/landlock/setup.c index c71832a8e369..0c85ea27e409 100644 --- a/security/landlock/setup.c +++ b/security/landlock/setup.c @@ -6,12 +6,14 @@ * Copyright © 2018-2020 ANSSI */ +#include <linux/bits.h> #include <linux/init.h> #include <linux/lsm_hooks.h> #include <uapi/linux/lsm.h> #include "common.h" #include "cred.h" +#include "errata.h" #include "fs.h" #include "net.h" #include "setup.h" @@ -31,8 +33,36 @@ struct lsm_blob_sizes landlock_blob_sizes __ro_after_init = { .lbs_superblock = sizeof(struct landlock_superblock_security), }; +int landlock_errata __ro_after_init; + +static void __init compute_errata(void) +{ + size_t i; + +#ifndef __has_include + /* + * This is a safeguard to make sure the compiler implements + * __has_include (see errata.h). + */ + WARN_ON_ONCE(1); + return; +#endif + + for (i = 0; landlock_errata_init[i].number; i++) { + const int prev_errata = landlock_errata; + + if (WARN_ON_ONCE(landlock_errata_init[i].abi > + landlock_abi_version)) + continue; + + landlock_errata |= BIT(landlock_errata_init[i].number - 1); + WARN_ON_ONCE(prev_errata == landlock_errata); + } +} + static int __init landlock_init(void) { + compute_errata(); landlock_add_cred_hooks(); landlock_add_task_hooks(); landlock_add_fs_hooks(); |