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systemd/0001-pid1-don-t-return-any-error-in-manager_dispatch_noti.patch
Franck Bui 04bd746a0e - Added 2 patches to fix bsc#1001765
0001-If-the-notification-message-length-is-0-ignore-the-m.patch
  0001-pid1-don-t-return-any-error-in-manager_dispatch_noti.patch

OBS-URL: https://build.opensuse.org/package/show/Base:System/systemd?expand=0&rev=956
2016-09-29 13:04:00 +00:00

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1.9 KiB
Diff

From: Franck Bui <fbui@suse.com>
Date: Thu, 29 Sep 2016 11:59:49 +0200
Subject: [PATCH 1/1] pid1: don't return any error in
manager_dispatch_notify_fd()
If manager_dispatch_notify_fd() fails and returns an error then the handling of
service notifications will be disabled entirely leading to a compromised system.
For example pid1 won't be able to receive the WATCHDOG messages anymore and
will kill all services supposed to send such messages.
---
src/core/manager.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/src/core/manager.c b/src/core/manager.c
index 43e231c..5704005 100644
--- a/src/core/manager.c
+++ b/src/core/manager.c
@@ -1716,10 +1716,14 @@ static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t
n = recvmsg(m->notify_fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC);
if (n < 0) {
- if (errno == EAGAIN || errno == EINTR)
- return 0;
+ if (!IN_SET(errno, EAGAIN, EINTR))
+ log_error("Failed to receive notification message: %m");
- return -errno;
+ /* It's not an option to return an error here since it
+ * would disable the notification handler entirely. Services
+ * wouldn't be able to send the WATCHDOG message for
+ * example... */
+ return 0;
}
if (n == 0) {
log_debug("Got zero-length notification message. Ignoring.");
@@ -1746,7 +1750,8 @@ static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t
r = fdset_new_array(&fds, fd_array, n_fds);
if (r < 0) {
close_many(fd_array, n_fds);
- return log_oom();
+ log_oom();
+ return 0;
}
}
--
2.10.0