Paul Eggert wrote: > I installed the attached patch into Gnulib > and this should appear in the next coreutils release.
Unfortunately, this patch introduces a memory leak: If num_sessions == 0 and sessions != NULL (which can happen, according to the man page), we need to call free (sessions). This patch fixes it. 2023-08-31 Bruno Haible <br...@clisp.org> readutmp: Fix memory leak introduced by last commit. * lib/readutmp.c (read_utmp_from_systemd): If num_sessions == 0 and sessions != NULL, do call free (sessions). diff --git a/lib/readutmp.c b/lib/readutmp.c index e99158677c..ec09feb59b 100644 --- a/lib/readutmp.c +++ b/lib/readutmp.c @@ -795,7 +795,7 @@ read_utmp_from_systemd (idx_t *n_entries, STRUCT_UTMP **utmp_buf, int options) { char **sessions; int num_sessions = sd_get_sessions (&sessions); - if (num_sessions > 0) + if (num_sessions >= 0 && sessions != NULL) { char **session_ptr; for (session_ptr = sessions; *session_ptr != NULL; session_ptr++)