The root directory can be provided by user (or a temporary one is generated) and is always formatted into connection URI for both secret driver and QEMU driver, like this: qemu:///embed?root=$root But if it so happens that there is an URI unfriendly character in root directory or path to it (say a space) then invalid URI is formatted which results in unexpected results. We can trust g_dir_make_tmp() to generate valid URI but we can't trust user. Escape user provided root directory. Always. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1920400 Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- src/qemu/qemu_shim.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/src/qemu/qemu_shim.c b/src/qemu/qemu_shim.c index 18bdc99256..c10598df4b 100644 --- a/src/qemu/qemu_shim.c +++ b/src/qemu/qemu_shim.c @@ -140,7 +140,8 @@ int main(int argc, char **argv) g_autofree char *xml = NULL; g_autofree char *uri = NULL; g_autofree char *suri = NULL; - char *root = NULL; + const char *root = NULL; + g_autofree char *escaped = NULL; bool tmproot = false; int ret = 1; g_autoptr(GError) error = NULL; @@ -216,6 +217,8 @@ int main(int argc, char **argv) } } + escaped = g_uri_escape_string(root, NULL, true); + virFileActivateDirOverrideForProg(argv[0]); if (verbose) @@ -242,7 +245,7 @@ int main(int argc, char **argv) eventLoopThread = g_thread_new("event-loop", qemuShimEventLoop, NULL); if (secrets && *secrets) { - suri = g_strdup_printf("secret:///embed?root=%s", root); + suri = g_strdup_printf("secret:///embed?root=%s", escaped); if (verbose) g_printerr("%s: %lld: opening %s\n", @@ -303,7 +306,7 @@ int main(int argc, char **argv) } } - uri = g_strdup_printf("qemu:///embed?root=%s", root); + uri = g_strdup_printf("qemu:///embed?root=%s", escaped); if (verbose) g_printerr("%s: %lld: opening %s\n", -- 2.26.2