We nowadays rename our child processes, hence argv[] will be clobbered,
let's hence copy the device path to dynamic memory before forking.
This is fall-out from
60ffa37a65a96c3af857a3dfc4a6fd47b20cc90e since we
now a lot more often end up overriding the argv[] buffer than before,
simple because we know what to override.
These kind of bugs kinda suck. THere are only two options here: stop
overriding argv[] for all cases (or just these cases) or explicitly
copying out everything we need in child processes before forking. With
this patch I opt for the latter, though I am not 100% convinced this is
a great solution. Just a better solution than everything else, i.e.
allowing argv[] to remain out of sync with what others see.
Fixes: #12135
static int run(int argc, char *argv[]) {
_cleanup_close_pair_ int progress_pipe[2] = { -1, -1 };
_cleanup_(sd_device_unrefp) sd_device *dev = NULL;
+ _cleanup_free_ char *dpath = NULL;
const char *device, *type;
bool root_directory;
struct stat st;
return 0;
if (argc > 1) {
- device = argv[1];
+ dpath = strdup(argv[1]);
+ if (!dpath)
+ return log_oom();
+
+ device = dpath;
if (stat(device, &st) < 0)
return log_error_errno(errno, "Failed to stat %s: %m", device);