37 lines
1.5 KiB
Diff
37 lines
1.5 KiB
Diff
From ba575dced76ed7420c8eaa77942e31b134927524 Mon Sep 17 00:00:00 2001
|
|
From: Robin Humble <plaguedbypenguins@gmail.com>
|
|
Date: Wed, 1 Feb 2023 23:36:48 +1100
|
|
Subject: [PATCH] pid1: fix segv triggered by status query (#26279)
|
|
|
|
If any query makes it to the end of install_info_follow() then I think symlink_target is set to NULL.
|
|
If that is followed by -EXDEV from unit_file_load_or_readlink(), then that causes basename(NULL)
|
|
which segfaults pid 1.
|
|
|
|
This is triggered by eg. "systemctl status crond" in RHEL9 if
|
|
|
|
/etc/systemd/system/crond.service
|
|
-> /ram/etc/systemd/system/crond.service
|
|
-> /usr/lib/systemd/system/.crond.service.blah.blah
|
|
-> /usr/lib/systemd/system/crond.service
|
|
|
|
(cherry picked from commit 19cfda9fc3c60de21a362ebb56bcb9f4a9855e85)
|
|
|
|
Related: #2138081
|
|
---
|
|
src/shared/install.c | 2 +-
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
|
diff --git a/src/shared/install.c b/src/shared/install.c
|
|
index 4b610b20a5..a760726628 100644
|
|
--- a/src/shared/install.c
|
|
+++ b/src/shared/install.c
|
|
@@ -1653,7 +1653,7 @@ static int install_info_traverse(
|
|
r = install_info_follow(ctx, i, lp, flags,
|
|
/* If linked, don't look at the target name */
|
|
/* ignore_different_name= */ i->install_mode == INSTALL_MODE_LINKED);
|
|
- if (r == -EXDEV) {
|
|
+ if (r == -EXDEV && i->symlink_target) {
|
|
_cleanup_free_ char *buffer = NULL;
|
|
const char *bn;
|
|
|