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ima,evm: move initcalls to the LSM framework

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This patch converts IMA and EVM to use the LSM frameworks's initcall
mechanism. It moved the integrity_fs_init() call to ima_fs_init() and
evm_init_secfs(), to work around the fact that there is no "integrity" LSM,
and introduced integrity_fs_fini() to remove the integrity directory, if
empty. Both integrity_fs_init() and integrity_fs_fini() support the
scenario of being called by both the IMA and EVM LSMs.

This patch does not touch any of the platform certificate code that
lives under the security/integrity/platform_certs directory as the
IMA/EVM developers would prefer to address that in a future patchset.

Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Acked-by: Mimi Zohar <zohar@linux.ibm.com>
[PM: adjust description as discussed over email]
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Roberto Sassu
2025-09-02 14:54:57 +02:00
committed by Paul Moore
parent 77ebff0607
commit 82fe7932e8
6 changed files with 35 additions and 10 deletions
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11
security/integrity/ima/ima_fs.c
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@@ -499,9 +499,15 @@ int __init ima_fs_init(void)
struct dentry *dentry;
int ret;
ret = integrity_fs_init();
if (ret < 0)
return ret;
ima_dir = securityfs_create_dir("ima", integrity_dir);
if (IS_ERR(ima_dir))
return PTR_ERR(ima_dir);
if (IS_ERR(ima_dir)) {
ret = PTR_ERR(ima_dir);
goto out;
}
ima_symlink = securityfs_create_symlink("ima", NULL, "integrity/ima",
NULL);
@@ -555,6 +561,7 @@ int __init ima_fs_init(void)
out:
securityfs_remove(ima_symlink);
securityfs_remove(ima_dir);
integrity_fs_fini();
return ret;
}