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From 62cd745d730e5ba13d5d7092ac566fc0b2148e61 Mon Sep 17 00:00:00 2001
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From: "Dmitry V. Levin" <ldv@altlinux.org>
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Date: Sun, 26 Apr 2020 11:12:59 +0000
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Subject: [PATCH] pam_motd: fix memory leak
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pam_motd used to leak memory allocated for each motd file
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successfully opened in try_to_display_directories_with_overrides.
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* modules/pam_motd/pam_motd.c
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(try_to_display_directories_with_overrides): Free abs_path.
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Fixes: f9c9c721 ("pam_motd: Support multiple motd paths specified, with filename overrides (#69)")
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---
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modules/pam_motd/pam_motd.c | 20 ++++++++++----------
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1 file changed, 10 insertions(+), 10 deletions(-)
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diff --git a/modules/pam_motd/pam_motd.c b/modules/pam_motd/pam_motd.c
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index f0cd317d..3be129a5 100644
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--- a/modules/pam_motd/pam_motd.c
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+++ b/modules/pam_motd/pam_motd.c
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@@ -259,23 +259,23 @@ static void try_to_display_directories_with_overrides(pam_handle_t *pamh,
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for (j = 0; j < num_motd_dirs; j++) {
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char *abs_path = NULL;
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+ int fd;
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if (join_dir_strings(&abs_path, motd_dir_path_split[j],
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- dirnames_all[i]) < 0) {
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+ dirnames_all[i]) < 0 || abs_path == NULL) {
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continue;
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}
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- if (abs_path != NULL) {
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- int fd = open(abs_path, O_RDONLY, 0);
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- if (fd >= 0) {
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- try_to_display_fd(pamh, fd);
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- close(fd);
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+ fd = open(abs_path, O_RDONLY, 0);
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+ _pam_drop(abs_path);
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- /* We displayed a file, skip to the next file name. */
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- break;
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- }
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+ if (fd >= 0) {
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+ try_to_display_fd(pamh, fd);
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+ close(fd);
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+
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+ /* We displayed a file, skip to the next file name. */
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+ break;
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}
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- _pam_drop(abs_path);
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}
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}
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--
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2.35.3
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