From fbf06cee60876d50f259d0689e3c03940750f0d4 Mon Sep 17 00:00:00 2001
From: Enrico Bravi <enrico.bravi@polito.it>
Date: Wed, 29 May 2024 20:14:34 +0200
Subject: [PATCH] ima: fix wrong zero-assignment during securityfs dentry
remove
In case of error during ima_fs_init() all the dentry already created
are removed. {ascii, binary}_securityfs_measurement_lists are freed
calling for each array the remove_securityfs_measurement_lists(). This
function, at the end, assigns to zero the securityfs_measurement_list_count.
This causes during the second call of remove_securityfs_measurement_lists()
to leave the dentry of the array pending, not removing them correctly,
because the securityfs_measurement_list_count is already zero.
Move the securityfs_measurement_list_count = 0 after the two
remove_securityfs_measurement_lists() calls to correctly remove all the
dentry already allocated.
Fixes: 9fa8e7625008 ("ima: add crypto agility support for template-hash algorithm")
Signed-off-by: Enrico Bravi <enrico.bravi@polito.it>
Reviewed-by: Roberto Sassu <roberto.sassu@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
---
security/integrity/ima/ima_fs.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c
index abdd22007ed83..e4a79a9b2d588 100644
--- a/security/integrity/ima/ima_fs.c
+++ b/security/integrity/ima/ima_fs.c
@@ -427,8 +427,6 @@ static void __init remove_securityfs_measurement_lists(struct dentry **lists)
kfree(lists);
}
-
- securityfs_measurement_list_count = 0;
}
static int __init create_securityfs_measurement_lists(void)
@@ -625,6 +623,7 @@ int __init ima_fs_init(void)
securityfs_remove(binary_runtime_measurements);
remove_securityfs_measurement_lists(ascii_securityfs_measurement_lists);
remove_securityfs_measurement_lists(binary_securityfs_measurement_lists);
+ securityfs_measurement_list_count = 0;
securityfs_remove(ima_symlink);
securityfs_remove(ima_dir);
--
GitLab