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-rw-r--r--src/basic/mount-util.c11
-rw-r--r--src/core/cgroup.c5
-rw-r--r--src/core/macros.systemd.in6
-rw-r--r--src/coredump/coredump.c38
-rw-r--r--src/nspawn/nspawn-register.c17
-rw-r--r--src/systemctl/systemctl.c3
-rw-r--r--units/systemd-nspawn@.service.in11
7 files changed, 60 insertions, 31 deletions
diff --git a/src/basic/mount-util.c b/src/basic/mount-util.c
index 63dff3dd5c..b91f0f9e0e 100644
--- a/src/basic/mount-util.c
+++ b/src/basic/mount-util.c
@@ -534,15 +534,22 @@ int repeat_unmount(const char *path, int flags) {
}
const char* mode_to_inaccessible_node(mode_t mode) {
+ /* This function maps a node type to the correspondent inaccessible node type.
+ * Character and block inaccessible devices may not be created (because major=0 and minor=0),
+ * in such case we map character and block devices to the inaccessible node type socket. */
switch(mode & S_IFMT) {
case S_IFREG:
return "/run/systemd/inaccessible/reg";
case S_IFDIR:
return "/run/systemd/inaccessible/dir";
case S_IFCHR:
- return "/run/systemd/inaccessible/chr";
+ if (access("/run/systemd/inaccessible/chr", F_OK) == 0)
+ return "/run/systemd/inaccessible/chr";
+ return "/run/systemd/inaccessible/sock";
case S_IFBLK:
- return "/run/systemd/inaccessible/blk";
+ if (access("/run/systemd/inaccessible/blk", F_OK) == 0)
+ return "/run/systemd/inaccessible/blk";
+ return "/run/systemd/inaccessible/sock";
case S_IFIFO:
return "/run/systemd/inaccessible/fifo";
case S_IFSOCK:
diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index 8b0f11ed50..c19e43f571 100644
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -800,7 +800,10 @@ static void cgroup_context_apply(Unit *u, CGroupMask mask, ManagerState state) {
"/dev/random\0" "rwm\0"
"/dev/urandom\0" "rwm\0"
"/dev/tty\0" "rwm\0"
- "/dev/pts/ptmx\0" "rw\0"; /* /dev/pts/ptmx may not be duplicated, but accessed */
+ "/dev/pts/ptmx\0" "rw\0" /* /dev/pts/ptmx may not be duplicated, but accessed */
+ /* Allow /run/systemd/inaccessible/{chr,blk} devices for mapping InaccessiblePaths */
+ "/run/systemd/inaccessible/chr\0" "rwm\0"
+ "/run/systemd/inaccessible/blk\0" "rwm\0";
const char *x, *y;
diff --git a/src/core/macros.systemd.in b/src/core/macros.systemd.in
index 028db1cc4a..6e8a3b3e3d 100644
--- a/src/core/macros.systemd.in
+++ b/src/core/macros.systemd.in
@@ -38,6 +38,12 @@ Requires(preun): systemd \
Requires(postun): systemd \
%{nil}
+%systemd_ordering \
+OrderWithRequires(post): systemd \
+OrderWithRequires(preun): systemd \
+OrderWithRequires(postun): systemd \
+%{nil}
+
%systemd_post() \
if [ $1 -eq 1 ] ; then \
# Initial installation \
diff --git a/src/coredump/coredump.c b/src/coredump/coredump.c
index 82a54968e7..998b047c29 100644
--- a/src/coredump/coredump.c
+++ b/src/coredump/coredump.c
@@ -852,12 +852,42 @@ static int send_iovec(const struct iovec iovec[], size_t n_iovec, int input_fd)
return log_error_errno(errno, "Failed to connect to coredump service: %m");
for (i = 0; i < n_iovec; i++) {
- ssize_t n;
- assert(iovec[i].iov_len > 0);
+ struct msghdr mh = {
+ .msg_iov = (struct iovec*) iovec + i,
+ .msg_iovlen = 1,
+ };
+ struct iovec copy[2];
+
+ for (;;) {
+ if (sendmsg(fd, &mh, MSG_NOSIGNAL) >= 0)
+ break;
+
+ if (errno == EMSGSIZE && mh.msg_iov[0].iov_len > 0) {
+ /* This field didn't fit? That's a pity. Given that this is just metadata,
+ * let's truncate the field at half, and try again. We append three dots, in
+ * order to show that this is truncated. */
+
+ if (mh.msg_iov != copy) {
+ /* We don't want to modify the caller's iovec, hence let's create our
+ * own array, consisting of two new iovecs, where the first is a
+ * (truncated) copy of what we want to send, and the second one
+ * contains the trailing dots. */
+ copy[0] = iovec[i];
+ copy[1] = (struct iovec) {
+ .iov_base = (char[]) { '.', '.', '.' },
+ .iov_len = 3,
+ };
+
+ mh.msg_iov = copy;
+ mh.msg_iovlen = 2;
+ }
+
+ copy[0].iov_len /= 2; /* halve it, and try again */
+ continue;
+ }
- n = send(fd, iovec[i].iov_base, iovec[i].iov_len, MSG_NOSIGNAL);
- if (n < 0)
return log_error_errno(errno, "Failed to send coredump datagram: %m");
+ }
}
r = send_one_fd(fd, input_fd, 0);
diff --git a/src/nspawn/nspawn-register.c b/src/nspawn/nspawn-register.c
index 7fd711b8a4..e5b76a0c5d 100644
--- a/src/nspawn/nspawn-register.c
+++ b/src/nspawn/nspawn-register.c
@@ -104,7 +104,7 @@ int register_machine(
return bus_log_create_error(r);
}
- r = sd_bus_message_append(m, "(sv)", "DevicePolicy", "s", "strict");
+ r = sd_bus_message_append(m, "(sv)", "DevicePolicy", "s", "closed");
if (r < 0)
return bus_log_create_error(r);
@@ -112,31 +112,20 @@ int register_machine(
* systemd-nspawn@.service, to keep the device
* policies in sync regardless if we are run with or
* without the --keep-unit switch. */
- r = sd_bus_message_append(m, "(sv)", "DeviceAllow", "a(ss)", 11,
+ r = sd_bus_message_append(m, "(sv)", "DeviceAllow", "a(ss)", 2,
/* Allow the container to
* access and create the API
* device nodes, so that
* PrivateDevices= in the
* container can work
* fine */
- "/dev/null", "rwm",
- "/dev/zero", "rwm",
- "/dev/full", "rwm",
- "/dev/random", "rwm",
- "/dev/urandom", "rwm",
- "/dev/tty", "rwm",
"/dev/net/tun", "rwm",
/* Allow the container
* access to ptys. However,
* do not permit the
* container to ever create
* these device nodes. */
- "/dev/pts/ptmx", "rw",
- "char-pts", "rw",
- /* Allow /run/systemd/inaccessible/{chr,blk}
- * devices inside the container */
- "/run/systemd/inaccessible/chr", "rwm",
- "/run/systemd/inaccessible/blk", "rwm");
+ "char-pts", "rw");
if (r < 0)
return bus_log_create_error(r);
diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index d3f437411a..1dbe35997a 100644
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -3033,6 +3033,9 @@ static int logind_check_inhibitors(enum action a) {
if (!on_tty())
return 0;
+ if (arg_transport != BUS_TRANSPORT_LOCAL)
+ return 0;
+
r = acquire_bus(BUS_FULL, &bus);
if (r < 0)
return r;
diff --git a/units/systemd-nspawn@.service.in b/units/systemd-nspawn@.service.in
index 8f9cf9acfe..c8141639b6 100644
--- a/units/systemd-nspawn@.service.in
+++ b/units/systemd-nspawn@.service.in
@@ -25,18 +25,9 @@ TasksMax=16384
# Enforce a strict device policy, similar to the one nspawn configures
# when it allocates its own scope unit. Make sure to keep these
# policies in sync if you change them!
-DevicePolicy=strict
-DeviceAllow=/dev/null rwm
-DeviceAllow=/dev/zero rwm
-DeviceAllow=/dev/full rwm
-DeviceAllow=/dev/random rwm
-DeviceAllow=/dev/urandom rwm
-DeviceAllow=/dev/tty rwm
+DevicePolicy=closed
DeviceAllow=/dev/net/tun rwm
-DeviceAllow=/dev/pts/ptmx rw
DeviceAllow=char-pts rw
-DeviceAllow=/run/systemd/inaccessible/chr rwm
-DeviceAllow=/run/systemd/inaccessible/blk rwm
# nspawn itself needs access to /dev/loop-control and /dev/loop, to
# implement the --image= option. Add these here, too.
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2025-02-08 20:09:06 +0000