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systemd/SOURCES/0276-core-mount-escape-inva...

107 lines
3.6 KiB

From fcdec60764cd1d6f2d859558303390fffcec3633 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Thu, 11 May 2023 19:21:57 +0900
Subject: [PATCH] core/mount: escape invalid UTF8 char in dbus reply
When What= or Options= may contain invalid UTF8 chars.
Replaces aaf7b0e41105d7b7cf30912cdac32820f011a219 (#27541).
(cherry picked from commit 4804da58536ab7ad46178a03f4d2da49fd8e4ba2)
Resolves: #2208240
---
src/core/dbus-mount.c | 67 +++++++++++++++++++++++++++++++++++--------
1 file changed, 55 insertions(+), 12 deletions(-)
diff --git a/src/core/dbus-mount.c b/src/core/dbus-mount.c
index 73702b1a16..55ad4f2c98 100644
--- a/src/core/dbus-mount.c
+++ b/src/core/dbus-mount.c
@@ -9,21 +9,66 @@
#include "mount.h"
#include "string-util.h"
#include "unit.h"
+#include "utf8.h"
+
+static int property_get_what(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ _cleanup_free_ char *escaped = NULL;
+ Mount *m = ASSERT_PTR(userdata);
+ const char *s = NULL;
+
+ assert(bus);
+ assert(reply);
-static const char *mount_get_what(const Mount *m) {
if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
- return m->parameters_proc_self_mountinfo.what;
- if (m->from_fragment && m->parameters_fragment.what)
- return m->parameters_fragment.what;
- return NULL;
+ s = m->parameters_proc_self_mountinfo.what;
+ else if (m->from_fragment && m->parameters_fragment.what)
+ s = m->parameters_fragment.what;
+
+ if (s) {
+ escaped = utf8_escape_invalid(s);
+ if (!escaped)
+ return -ENOMEM;
+ }
+
+ return sd_bus_message_append_basic(reply, 's', escaped);
}
-static const char *mount_get_options(const Mount *m) {
+static int property_get_options(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ _cleanup_free_ char *escaped = NULL;
+ Mount *m = ASSERT_PTR(userdata);
+ const char *s = NULL;
+
+ assert(bus);
+ assert(reply);
+
if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.options)
- return m->parameters_proc_self_mountinfo.options;
- if (m->from_fragment && m->parameters_fragment.options)
- return m->parameters_fragment.options;
- return NULL;
+ s = m->parameters_proc_self_mountinfo.options;
+ else if (m->from_fragment && m->parameters_fragment.options)
+ s = m->parameters_fragment.options;
+
+ if (s) {
+ escaped = utf8_escape_invalid(s);
+ if (!escaped)
+ return -ENOMEM;
+ }
+
+ return sd_bus_message_append_basic(reply, 's', escaped);
}
static const char *mount_get_fstype(const Mount *m) {
@@ -34,8 +79,6 @@ static const char *mount_get_fstype(const Mount *m) {
return NULL;
}
-static BUS_DEFINE_PROPERTY_GET(property_get_what, "s", Mount, mount_get_what);
-static BUS_DEFINE_PROPERTY_GET(property_get_options, "s", Mount, mount_get_options);
static BUS_DEFINE_PROPERTY_GET(property_get_type, "s", Mount, mount_get_fstype);
static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, mount_result, MountResult);