You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
94 lines
4.4 KiB
94 lines
4.4 KiB
From 8eac75556d0f53f3ba6cd12d2545bc8dbebb11f4 Mon Sep 17 00:00:00 2001
|
|
From: Colin Walters <walters@verbum.org>
|
|
Date: Tue, 4 Jun 2024 06:57:19 -0400
|
|
Subject: [PATCH] repo: Don't try to perform labeling if SELinux is disabled
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
The default for container execution is that `/sys/fs/selinux`
|
|
is not mounted, and the libselinux library function `is_selinux_enabled`
|
|
should be used to dynamically check if the system should attempt to perform SELinux labeling.
|
|
|
|
This is how it's done by rpm, ostree, and systemd for example.
|
|
|
|
But this code unconditionally tries to label if it finds a policy,
|
|
which breaks in an obscure corner case
|
|
when executed inside a container that includes policy files (e.g.
|
|
fedora/rhel-bootc) but when we're not using overlayfs for the backend
|
|
(with BUILDAH_BACKEND=vfs).
|
|
|
|
Signed-off-by: Petr Písař <ppisar@redhat.com>
|
|
---
|
|
libdnf/repo/Repo.cpp | 50 +++++++++++++++++++++++---------------------
|
|
1 file changed, 26 insertions(+), 24 deletions(-)
|
|
|
|
diff --git a/libdnf/repo/Repo.cpp b/libdnf/repo/Repo.cpp
|
|
index 68b82ccc..4f646f8c 100644
|
|
--- a/libdnf/repo/Repo.cpp
|
|
+++ b/libdnf/repo/Repo.cpp
|
|
@@ -676,34 +676,36 @@ static int create_temporary_directory(char *name_template) {
|
|
int old_default_context_was_retrieved= 0;
|
|
struct selabel_handle *labeling_handle = NULL;
|
|
|
|
- /* A purpose of this piece of code is to deal with applications whose
|
|
- * security policy overrides a file context for temporary files but don't
|
|
- * know that libdnf executes GnuPG which expects a default file context. */
|
|
- if (0 == getfscreatecon(&old_default_context)) {
|
|
- old_default_context_was_retrieved = 1;
|
|
- } else {
|
|
- logger->debug(tfm::format("Failed to retrieve a default SELinux context"));
|
|
- }
|
|
+ if (is_selinux_enabled()) {
|
|
+ /* A purpose of this piece of code is to deal with applications whose
|
|
+ * security policy overrides a file context for temporary files but don't
|
|
+ * know that libdnf executes GnuPG which expects a default file context. */
|
|
+ if (0 == getfscreatecon(&old_default_context)) {
|
|
+ old_default_context_was_retrieved = 1;
|
|
+ } else {
|
|
+ logger->debug(tfm::format("Failed to retrieve a default SELinux context"));
|
|
+ }
|
|
|
|
- labeling_handle = selabel_open(SELABEL_CTX_FILE, NULL, 0);
|
|
- if (NULL == labeling_handle) {
|
|
- logger->debug(tfm::format("Failed to open a SELinux labeling handle: %s",
|
|
- strerror(errno)));
|
|
- } else {
|
|
- if (selabel_lookup(labeling_handle, &new_default_context, name_template, 0700)) {
|
|
- /* Here we could hard-code "system_u:object_r:user_tmp_t:s0", but
|
|
- * that value should be really defined in default file context
|
|
- * SELinux policy. Only log that the policy is incpomplete. */
|
|
- logger->debug(tfm::format("Failed to look up a default SELinux label for \"%s\"",
|
|
- name_template));
|
|
+ labeling_handle = selabel_open(SELABEL_CTX_FILE, NULL, 0);
|
|
+ if (NULL == labeling_handle) {
|
|
+ logger->debug(tfm::format("Failed to open a SELinux labeling handle: %s",
|
|
+ strerror(errno)));
|
|
} else {
|
|
- if (setfscreatecon(new_default_context)) {
|
|
- logger->debug(tfm::format("Failed to set default SELinux context to \"%s\"",
|
|
- new_default_context));
|
|
+ if (selabel_lookup(labeling_handle, &new_default_context, name_template, 0700)) {
|
|
+ /* Here we could hard-code "system_u:object_r:user_tmp_t:s0", but
|
|
+ * that value should be really defined in default file context
|
|
+ * SELinux policy. Only log that the policy is incpomplete. */
|
|
+ logger->debug(tfm::format("Failed to look up a default SELinux label for \"%s\"",
|
|
+ name_template));
|
|
+ } else {
|
|
+ if (setfscreatecon(new_default_context)) {
|
|
+ logger->debug(tfm::format("Failed to set default SELinux context to \"%s\"",
|
|
+ new_default_context));
|
|
+ }
|
|
+ freecon(new_default_context);
|
|
}
|
|
- freecon(new_default_context);
|
|
+ selabel_close(labeling_handle);
|
|
}
|
|
- selabel_close(labeling_handle);
|
|
}
|
|
#endif
|
|
|
|
--
|
|
2.45.2
|
|
|