Merge 23c137c86d into bbec1c87d3

Continuation of 4ebbb5bfe8.
Closes #35307.

man/importctl.xml

@@ -128,7 +128,8 @@
 
         <para>If <option>-keep-download=yes</option> is specified the image will be downloaded and stored in
         a read-only subvolume/directory in the image directory that is named after the specified URL and its
-        HTTP etag. A writable snapshot is then taken from this subvolume, and named after the specified local
+        HTTP etag (see <ulink url="https://en.wikipedia.org/wiki/HTTP_ETag">HTTP ETag</ulink> for more
+        information). A writable snapshot is then taken from this subvolume, and named after the specified local
         name. This behavior ensures that creating multiple instances of the same URL is efficient, as
         multiple downloads are not necessary. In order to create only the read-only image, and avoid creating
         its writable snapshot, specify <literal>-</literal> as local name.</para>

man/pam_systemd_loadkey.xml

@@ -28,7 +28,9 @@
     <title>Description</title>
 
     <para><command>pam_systemd_loadkey</command> reads a NUL-separated password list from the kernel keyring,
-    and sets the last password in the list as the PAM authtok.</para>
+    and sets the last password in the list as the PAM authtok, which can be used by e.g.
+    <citerefentry project='man-pages'><refentrytitle>pam_get_authtok</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
+    </para>
 
     <para>The password list is supposed to be stored in the "user" keyring of the root user,
     by an earlier call to

man/run0.xml

@@ -61,7 +61,10 @@
     <literal>systemd-run0</literal> PAM stack.</para>
 
     <para>Note that <command>run0</command> is implemented as an alternative multi-call invocation of
-    <citerefentry><refentrytitle>systemd-run</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para>
+    <citerefentry><refentrytitle>systemd-run</refentrytitle><manvolnum>1</manvolnum></citerefentry>. That is,
+    <command>run0</command> is a symbolic link to <command>systemd-run</command> executable file, and it
+    behaves as <command>run0</command> if it is invoked through the symbolic link, otherwise behaves as
+    <command>systemd-run</command>.</para>
   </refsect1>
 
   <refsect1>

man/systemd-rfkill.service.xml

@@ -41,8 +41,10 @@
   <refsect1>
     <title>Kernel Command Line</title>
 
-    <para><filename>systemd-rfkill</filename> understands the
+    <para>
-    following kernel command line parameter:</para>
+      <command>systemd-rfkill</command> understands the following kernel command line parameter. See also
+      <citerefentry><refentrytitle>kernel-command-line</refentrytitle><manvolnum>7</manvolnum></citerefentry>.
+    </para>
 
     <variablelist class='kernel-commandline-options'>
       <varlistentry>

man/ukify.xml

@@ -394,9 +394,9 @@
           <listitem><para>SBAT metadata associated with the UKI or addon. SBAT policies are useful to revoke
           whole groups of UKIs or addons with a single, static policy update that does not take space in
           DBX/MOKX. If not specified manually, a default metadata entry consisting of
-          <literal>uki,1,UKI,uki,1,https://uapi-group.org/specifications/specs/unified_kernel_image/</literal>
+          <programlisting>uki,1,UKI,uki,1,https://uapi-group.org/specifications/specs/unified_kernel_image/</programlisting>
           for UKIs and
-          <literal>uki-addon,1,UKI Addon,addon,1,https://www.freedesktop.org/software/systemd/man/latest/systemd-stub.html</literal>
+          <programlisting>uki-addon,1,UKI Addon,addon,1,https://www.freedesktop.org/software/systemd/man/latest/systemd-stub.html</programlisting>
           for addons will be used, to ensure it is always possible to revoke them. For more information on
           SBAT see <ulink url="https://github.com/rhboot/shim/blob/main/SBAT.md">Shim documentation</ulink>.
           </para>

src/basic/fileio.c

@@ -289,7 +289,8 @@ int write_string_file_full(
                 const char *fn,
                 const char *line,
                 WriteStringFileFlags flags,
-                const struct timespec *ts) {
+                const struct timespec *ts,
+                const char *label_fn) {
 
         bool call_label_ops_post = false, made_file = false;
         _cleanup_fclose_ FILE *f = NULL;
@@ -321,7 +322,8 @@ int write_string_file_full(
         mode_t mode = write_string_file_flags_to_mode(flags);
 
         if (FLAGS_SET(flags, WRITE_STRING_FILE_LABEL|WRITE_STRING_FILE_CREATE)) {
-                r = label_ops_pre(dir_fd, fn, mode);
+                const char *lookup = label_fn ? label_fn : fn;
+                r = label_ops_pre(dir_fd, lookup, mode);
                 if (r < 0)
                         goto fail;
 

src/basic/fileio.h

@@ -51,12 +51,13 @@ int write_string_stream_full(FILE *f, const char *line, WriteStringFileFlags fla
 static inline int write_string_stream(FILE *f, const char *line, WriteStringFileFlags flags) {
         return write_string_stream_full(f, line, flags, /* ts= */ NULL);
 }
-int write_string_file_full(int dir_fd, const char *fn, const char *line, WriteStringFileFlags flags, const struct timespec *ts);
+
+int write_string_file_full(int dir_fd, const char *fn, const char *line, WriteStringFileFlags flags, const struct timespec *ts, const char *label_fn);
 static inline int write_string_file(const char *fn, const char *line, WriteStringFileFlags flags) {
-        return write_string_file_full(AT_FDCWD, fn, line, flags, /* ts= */ NULL);
+        return write_string_file_full(AT_FDCWD, fn, line, flags, /* ts= */ NULL, /*label_fn=*/ NULL);
 }
 static inline int write_string_file_at(int dir_fd, const char *fn, const char *line, WriteStringFileFlags flags) {
-        return write_string_file_full(dir_fd, fn, line, flags, /* ts= */ NULL);
+        return write_string_file_full(dir_fd, fn, line, flags, /* ts= */ NULL, /*label_fn=*/ NULL);
 }
 int write_string_filef(const char *fn, WriteStringFileFlags flags, const char *format, ...) _printf_(3, 4);
 

src/sysext/sysext.c

@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
+#include <errno.h>
 #include <fcntl.h>
 #include <getopt.h>
 #include <linux/loop.h>
@@ -45,6 +46,7 @@
 #include "process-util.h"
 #include "rm-rf.h"
 #include "sort-util.h"
+#include "selinux-util.h"
 #include "string-table.h"
 #include "string-util.h"
 #include "terminal-util.h"
@@ -899,6 +901,7 @@ static int resolve_mutable_directory(
         _cleanup_free_ char *path = NULL, *resolved_path = NULL, *dir_name = NULL;
         const char *root = arg_root, *base = MUTABLE_EXTENSIONS_BASE_DIR;
         int r;
+        _cleanup_close_ int atfd = -EBADF;
 
         assert(hierarchy);
         assert(ret_resolved_mutable_directory);
@@ -943,6 +946,14 @@ static int resolve_mutable_directory(
                 r = mkdir_p(path_in_root, 0700);
                 if (r < 0)
                         return log_error_errno(r, "Failed to create a directory '%s': %m", path_in_root);
+
+                atfd = open(path_in_root, O_DIRECTORY|O_CLOEXEC);
+                if (atfd < 0)
+                        return log_error_errno(errno, "Failed to open directory '%s': %m", path_in_root);
+
+                r = mac_selinux_fix_full(atfd, NULL, hierarchy, 0);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to fix SELinux label for '%s': %m", path_in_root);
         }
 
         r = chase(path, root, CHASE_PREFIX_ROOT, &resolved_path, NULL);
@@ -1289,6 +1300,7 @@ static int mount_overlayfs_with_op(
 
         int r;
         const char *top_layer = NULL;
+        _cleanup_close_ int atfd = -EBADF;
 
         assert(op);
         assert(overlay_path);
@@ -1301,10 +1313,28 @@ static int mount_overlayfs_with_op(
         if (r < 0)
                 return log_error_errno(r, "Failed to make directory '%s': %m", meta_path);
 
+        atfd = open(meta_path, O_DIRECTORY|O_CLOEXEC);
+        if (atfd < 0)
+                return log_error_errno(errno, "Failed to open directory '%s': %m", meta_path);
+
+        r = mac_selinux_fix_full(atfd, NULL, op->hierarchy, 0);
+        if (r < 0)
+                return log_error_errno(r, "Failed to fix SELinux label for '%s': %m", meta_path);
+
         if (op->upper_dir && op->work_dir) {
                 r = mkdir_p(op->work_dir, 0700);
                 if (r < 0)
                         return log_error_errno(r, "Failed to make directory '%s': %m", op->work_dir);
+                _cleanup_close_ int dfd = -EBADF;
+
+                dfd = open(op->work_dir, O_DIRECTORY|O_CLOEXEC);
+                if (dfd < 0)
+                        return log_error_errno(errno, "Failed to open directory '%s': %m", op->work_dir);
+
+                r = mac_selinux_fix_full(dfd, NULL, op->hierarchy, 0);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to fix SELinux label for '%s': %m", op->work_dir);
+
                 top_layer = op->upper_dir;
         } else {
                 assert(!strv_isempty(op->lower_dirs));
@@ -1325,7 +1355,7 @@ static int mount_overlayfs_with_op(
         return 0;
 }
 
-static int write_extensions_file(ImageClass image_class, char **extensions, const char *meta_path) {
+static int write_extensions_file(ImageClass image_class, char **extensions, const char *meta_path, const char *hierarchy) {
         _cleanup_free_ char *f = NULL, *buf = NULL;
         int r;
 
@@ -1343,14 +1373,15 @@ static int write_extensions_file(ImageClass image_class, char **extensions, cons
         if (!buf)
                 return log_oom();
 
-        r = write_string_file(f, buf, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_MKDIR_0755);
+        const char *hierarchy_path = path_join(hierarchy, image_class_info[image_class].dot_directory_name, image_class_info[image_class].short_identifier_plural);
+        r = write_string_file_full(AT_FDCWD,f, buf, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_MKDIR_0755|WRITE_STRING_FILE_LABEL, NULL, hierarchy_path);
         if (r < 0)
                 return log_error_errno(r, "Failed to write extension meta file '%s': %m", f);
 
         return 0;
 }
 
-static int write_dev_file(ImageClass image_class, const char *meta_path, const char *overlay_path) {
+static int write_dev_file(ImageClass image_class, const char *meta_path, const char *overlay_path, const char *hierarchy) {
         _cleanup_free_ char *f = NULL;
         struct stat st;
         int r;
@@ -1372,14 +1403,15 @@ static int write_dev_file(ImageClass image_class, const char *meta_path, const c
         /* Modifying the underlying layers while the overlayfs is mounted is technically undefined, but at
          * least it won't crash or deadlock, as per the kernel docs about overlayfs:
          * https://www.kernel.org/doc/html/latest/filesystems/overlayfs.html#changes-to-underlying-filesystems */
-        r = write_string_file(f, FORMAT_DEVNUM(st.st_dev), WRITE_STRING_FILE_CREATE);
+        const char *hierarchy_path = path_join(hierarchy, image_class_info[image_class].dot_directory_name, image_class_info[image_class].short_identifier_plural);
+        r = write_string_file_full(AT_FDCWD, f, FORMAT_DEVNUM(st.st_dev), WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_LABEL, NULL, hierarchy_path);
         if (r < 0)
                 return log_error_errno(r, "Failed to write '%s': %m", f);
 
         return 0;
 }
 
-static int write_work_dir_file(ImageClass image_class, const char *meta_path, const char *work_dir) {
+static int write_work_dir_file(ImageClass image_class, const char *meta_path, const char *work_dir, const char* hierarchy) {
         _cleanup_free_ char *escaped_work_dir_in_root = NULL, *f = NULL;
         char *work_dir_in_root = NULL;
         int r;
@@ -1406,7 +1438,8 @@ static int write_work_dir_file(ImageClass image_class, const char *meta_path, co
         escaped_work_dir_in_root = cescape(work_dir_in_root);
         if (!escaped_work_dir_in_root)
                 return log_oom();
-        r = write_string_file(f, escaped_work_dir_in_root, WRITE_STRING_FILE_CREATE);
+        const char *hierarchy_path = path_join(hierarchy, image_class_info[image_class].dot_directory_name, "work_dir");
+        r = write_string_file_full(AT_FDCWD, f, escaped_work_dir_in_root, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_LABEL, NULL, hierarchy_path);
         if (r < 0)
                 return log_error_errno(r, "Failed to write '%s': %m", f);
 
@@ -1418,8 +1451,10 @@ static int store_info_in_meta(
                 char **extensions,
                 const char *meta_path,
                 const char *overlay_path,
-                const char *work_dir) {
+                const char *work_dir,
-
+                const char *hierarchy) {
+        _cleanup_free_ char *f = NULL;
+        _cleanup_close_ int atfd = -EBADF;
         int r;
 
         assert(extensions);
@@ -1427,15 +1462,32 @@ static int store_info_in_meta(
         assert(overlay_path);
         /* work_dir may be NULL */
 
-        r = write_extensions_file(image_class, extensions, meta_path);
+        f = path_join(meta_path, image_class_info[image_class].dot_directory_name);
+        if (!f)
+                return log_oom();
+
+        r = mkdir_p(f, 0755);
         if (r < 0)
                 return r;
 
-        r = write_dev_file(image_class, meta_path, overlay_path);
+        atfd = open(f, O_DIRECTORY|O_CLOEXEC);
+        if (atfd < 0)
+                return log_error_errno(errno, "Failed to open directory '%s': %m", f);
+
+        r = mac_selinux_fix_full(atfd, NULL, hierarchy, 0);
+
+        if (r < 0)
+                return log_error_errno(r, "Failed to fix SELinux label for '%s': %m", hierarchy);
+
+        r = write_extensions_file(image_class, extensions, meta_path, hierarchy);
         if (r < 0)
                 return r;
 
-        r = write_work_dir_file(image_class, meta_path, work_dir);
+        r = write_dev_file(image_class, meta_path, overlay_path, hierarchy);
+        if (r < 0)
+                return r;
+
+        r = write_work_dir_file(image_class, meta_path, work_dir, hierarchy);
         if (r < 0)
                 return r;
 
@@ -1501,6 +1553,8 @@ static int merge_hierarchy(
         assert(overlay_path);
         assert(workspace_path);
 
+        mac_selinux_init();
+
         r = determine_used_extensions(hierarchy, paths, &used_paths, &extensions_used);
         if (r < 0)
                 return r;
@@ -1528,7 +1582,7 @@ static int merge_hierarchy(
         if (r < 0)
                 return r;
 
-        r = store_info_in_meta(image_class, extensions, meta_path, overlay_path, op->work_dir);
+        r = store_info_in_meta(image_class, extensions, meta_path, overlay_path, op->work_dir, op->hierarchy);
         if (r < 0)
                 return r;
 

src/update-done/update-done.c

@@ -29,7 +29,7 @@ static int apply_timestamp(const char *path, struct timespec *ts) {
                      timespec_load_nsec(ts)) < 0)
                 return log_oom();
 
-        r = write_string_file_full(AT_FDCWD, path, message, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC|WRITE_STRING_FILE_LABEL, ts);
+        r = write_string_file_full(AT_FDCWD, path, message, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC|WRITE_STRING_FILE_LABEL, ts, NULL);
         if (r == -EROFS)
                 log_debug_errno(r, "Cannot create \"%s\", file system is read-only.", path);
         else if (r < 0)