rpms/systemd
7
0
Fork 0
Code Issues Pull Requests Releases Activity
6020cc372a
systemd/SOURCES/0070-tree-wide-don-t-use-strjoina-on-getenv-values.patch
CentOS Sources 7116380433 import systemd-250-12.el9_1
2022-11-15 07:41:42 +00:00

209 lines
8.0 KiB
Diff
Raw Blame History

From 03bf37877f1c7045724cba12d69e93c8c411646e Mon Sep 17 00:00:00 2001
From: Anita Zhang <the.anitazha@gmail.com>
Date: Wed, 26 Jan 2022 10:53:40 -0800
Subject: [PATCH] tree-wide: don't use strjoina() on getenv() values
Avoid doing stack allocations on environment variables.
(cherry picked from commit 1d3b68f6e1538b6a86cbe3650d8b81df2877ef42)
Related: #2017035
---
src/basic/path-lookup.c | 8 ++++++--
src/core/dbus.c | 8 ++++++--
src/home/homed-home.c | 10 +++++++---
src/home/homed-manager.c | 26 ++++++++++++++++++--------
src/run/run.c | 7 +++++--
src/shared/pager.c | 9 +++++++--
6 files changed, 49 insertions(+), 19 deletions(-)
diff --git a/src/basic/path-lookup.c b/src/basic/path-lookup.c
index 6fb8c40e7a..921a30cef7 100644
--- a/src/basic/path-lookup.c
+++ b/src/basic/path-lookup.c
@@ -238,7 +238,7 @@ static int acquire_generator_dirs(
char **generator_early,
char **generator_late) {
- _cleanup_free_ char *x = NULL, *y = NULL, *z = NULL;
+ _cleanup_free_ char *x = NULL, *y = NULL, *z = NULL, *p = NULL;
const char *prefix;
assert(generator);
@@ -261,7 +261,11 @@ static int acquire_generator_dirs(
if (!e)
return -ENXIO;
- prefix = strjoina(e, "/systemd");
+ p = path_join(e, "/systemd");
+ if (!p)
+ return -ENOMEM;
+
+ prefix = p;
}
x = path_join(prefix, "generator");
diff --git a/src/core/dbus.c b/src/core/dbus.c
index 2c5bda58f9..073675ceef 100644
--- a/src/core/dbus.c
+++ b/src/core/dbus.c
@@ -925,14 +925,18 @@ int bus_init_private(Manager *m) {
r = sockaddr_un_set_path(&sa.un, "/run/systemd/private");
} else {
- const char *e, *joined;
+ _cleanup_free_ char *joined = NULL;
+ const char *e;
e = secure_getenv("XDG_RUNTIME_DIR");
if (!e)
return log_error_errno(SYNTHETIC_ERRNO(EHOSTDOWN),
"XDG_RUNTIME_DIR is not set, refusing.");
- joined = strjoina(e, "/systemd/private");
+ joined = path_join(e, "/systemd/private");
+ if (!joined)
+ return log_oom();
+
r = sockaddr_un_set_path(&sa.un, joined);
}
if (r < 0)
diff --git a/src/home/homed-home.c b/src/home/homed-home.c
index 470c7f07f6..1340cf30d3 100644
--- a/src/home/homed-home.c
+++ b/src/home/homed-home.c
@@ -1185,14 +1185,18 @@ static int home_start_work(Home *h, const char *verb, UserRecord *hr, UserRecord
if (r < 0)
return r;
if (r == 0) {
+ _cleanup_free_ char *joined = NULL;
const char *homework, *suffix, *unix_path;
/* Child */
suffix = getenv("SYSTEMD_HOME_DEBUG_SUFFIX");
- if (suffix)
- unix_path = strjoina("/run/systemd/home/notify.", suffix);
- else
+ if (suffix) {
+ joined = strjoin("/run/systemd/home/notify.", suffix);
+ if (!joined)
+ return log_oom();
+ unix_path = joined;
+ } else
unix_path = "/run/systemd/home/notify";
if (setenv("NOTIFY_SOCKET", unix_path, 1) < 0) {
diff --git a/src/home/homed-manager.c b/src/home/homed-manager.c
index 6c178b8a0e..c1ec555cac 100644
--- a/src/home/homed-manager.c
+++ b/src/home/homed-manager.c
@@ -936,6 +936,7 @@ int manager_enumerate_images(Manager *m) {
}
static int manager_connect_bus(Manager *m) {
+ _cleanup_free_ char *b = NULL;
const char *suffix, *busname;
int r;
@@ -955,9 +956,12 @@ static int manager_connect_bus(Manager *m) {
return r;
suffix = getenv("SYSTEMD_HOME_DEBUG_SUFFIX");
- if (suffix)
- busname = strjoina("org.freedesktop.home1.", suffix);
- else
+ if (suffix) {
+ b = strjoin("org.freedesktop.home1.", suffix);
+ if (!b)
+ return log_oom();
+ busname = b;
+ } else
busname = "org.freedesktop.home1";
r = sd_bus_request_name_async(m->bus, NULL, busname, 0, NULL, NULL);
@@ -974,6 +978,7 @@ static int manager_connect_bus(Manager *m) {
}
static int manager_bind_varlink(Manager *m) {
+ _cleanup_free_ char *p = NULL;
const char *suffix, *socket_path;
int r;
@@ -999,9 +1004,12 @@ static int manager_bind_varlink(Manager *m) {
/* To make things easier to debug, when working from a homed managed home directory, let's optionally
* use a different varlink socket name */
suffix = getenv("SYSTEMD_HOME_DEBUG_SUFFIX");
- if (suffix)
- socket_path = strjoina("/run/systemd/userdb/io.systemd.Home.", suffix);
- else
+ if (suffix) {
+ p = strjoin("/run/systemd/userdb/io.systemd.Home.", suffix);
+ if (!p)
+ return log_oom();
+ socket_path = p;
+ } else
socket_path = "/run/systemd/userdb/io.systemd.Home";
r = varlink_server_listen_address(m->varlink_server, socket_path, 0666);
@@ -1159,9 +1167,11 @@ static int manager_listen_notify(Manager *m) {
suffix = getenv("SYSTEMD_HOME_DEBUG_SUFFIX");
if (suffix) {
- const char *unix_path;
+ _cleanup_free_ char *unix_path = NULL;
- unix_path = strjoina("/run/systemd/home/notify.", suffix);
+ unix_path = strjoin("/run/systemd/home/notify.", suffix);
+ if (!unix_path)
+ return log_oom();
r = sockaddr_un_set_path(&sa.un, unix_path);
if (r < 0)
return log_error_errno(r, "Socket path %s does not fit in sockaddr_un: %m", unix_path);
diff --git a/src/run/run.c b/src/run/run.c
index ff24373847..e75b027542 100644
--- a/src/run/run.c
+++ b/src/run/run.c
@@ -794,9 +794,12 @@ static int transient_service_set_properties(sd_bus_message *m, const char *pty_p
e = getenv("TERM");
if (e) {
- char *n;
+ _cleanup_free_ char *n = NULL;
+
+ n = strjoin("TERM=", e);
+ if (!n)
+ return log_oom();
- n = strjoina("TERM=", e);
r = sd_bus_message_append(m,
"(sv)",
"Environment", "as", 1, n);
diff --git a/src/shared/pager.c b/src/shared/pager.c
index f75ef62d2d..9426d3ef98 100644
--- a/src/shared/pager.c
+++ b/src/shared/pager.c
@@ -86,6 +86,7 @@ static int no_quit_on_interrupt(int exe_name_fd, const char *less_opts) {
void pager_open(PagerFlags flags) {
_cleanup_close_pair_ int fd[2] = { -1, -1 }, exe_name_pipe[2] = { -1, -1 };
_cleanup_strv_free_ char **pager_args = NULL;
+ _cleanup_free_ char *l = NULL;
const char *pager, *less_opts;
int r;
@@ -131,8 +132,12 @@ void pager_open(PagerFlags flags) {
less_opts = getenv("SYSTEMD_LESS");
if (!less_opts)
less_opts = "FRSXMK";
- if (flags & PAGER_JUMP_TO_END)
- less_opts = strjoina(less_opts, " +G");
+ if (flags & PAGER_JUMP_TO_END) {
+ l = strjoin(less_opts, " +G");
+ if (!l)
+ return (void) log_oom();
+ less_opts = l;
+ }
/* We set SIGINT as PR_DEATHSIG signal here, to match the "K" parameter we set in $LESS, which enables SIGINT behaviour. */
r = safe_fork("(pager)", FORK_RESET_SIGNALS|FORK_DEATHSIG_SIGINT|FORK_RLIMIT_NOFILE_SAFE|FORK_LOG, &pager_pid);
Reference in New Issue View Git Blame Copy Permalink