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-rw-r--r--src/core/selinux-access.c2
-rw-r--r--src/journal/journald-stream.c32
-rw-r--r--src/libsystemd/sd-bus/bus-control.c6
-rw-r--r--src/libsystemd/sd-bus/bus-creds.c13
-rw-r--r--src/libsystemd/sd-bus/bus-internal.h2
-rw-r--r--src/libsystemd/sd-bus/bus-socket.c87
-rw-r--r--src/libsystemd/sd-bus/sd-bus.c1
-rw-r--r--src/test/test-copy.c35
8 files changed, 75 insertions, 103 deletions
diff --git a/src/core/selinux-access.c b/src/core/selinux-access.c
index 5e9a4a5e02..decd42f95a 100644
--- a/src/core/selinux-access.c
+++ b/src/core/selinux-access.c
@@ -261,7 +261,7 @@ int mac_selinux_generic_access_check(
audit_info.path = path;
audit_info.cmdline = cl;
- r = selinux_check_access((security_context_t) scon, fcon, tclass, permission, &audit_info);
+ r = selinux_check_access(scon, fcon, tclass, permission, &audit_info);
if (r < 0)
r = sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "SELinux policy denies access.");
diff --git a/src/journal/journald-stream.c b/src/journal/journald-stream.c
index b572147a56..db2f581972 100644
--- a/src/journal/journald-stream.c
+++ b/src/journal/journald-stream.c
@@ -59,10 +59,7 @@ struct StdoutStream {
int fd;
struct ucred ucred;
-#ifdef HAVE_SELINUX
- security_context_t security_context;
-#endif
-
+ char *label;
char *identifier;
char *unit_id;
int priority;
@@ -99,12 +96,7 @@ void stdout_stream_free(StdoutStream *s) {
}
safe_close(s->fd);
-
-#ifdef HAVE_SELINUX
- if (s->security_context)
- freecon(s->security_context);
-#endif
-
+ free(s->label);
free(s->identifier);
free(s->unit_id);
free(s->state_file);
@@ -225,8 +217,7 @@ static int stdout_stream_log(StdoutStream *s, const char *p) {
char syslog_facility[sizeof("SYSLOG_FACILITY=")-1 + DECIMAL_STR_MAX(int) + 1];
_cleanup_free_ char *message = NULL, *syslog_identifier = NULL;
unsigned n = 0;
- char *label = NULL;
- size_t label_len = 0;
+ size_t label_len;
assert(s);
assert(p);
@@ -271,14 +262,8 @@ static int stdout_stream_log(StdoutStream *s, const char *p) {
if (message)
IOVEC_SET_STRING(iovec[n++], message);
-#ifdef HAVE_SELINUX
- if (s->security_context) {
- label = (char*) s->security_context;
- label_len = strlen((char*) s->security_context);
- }
-#endif
-
- server_dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL, label, label_len, s->unit_id, priority, 0);
+ label_len = s->label ? strlen(s->label) : 0;
+ server_dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL, s->label, label_len, s->unit_id, priority, 0);
return 0;
}
@@ -489,12 +474,11 @@ static int stdout_stream_install(Server *s, int fd, StdoutStream **ret) {
if (r < 0)
return log_error_errno(r, "Failed to determine peer credentials: %m");
-#ifdef HAVE_SELINUX
if (mac_selinux_use()) {
- if (getpeercon(fd, &stream->security_context) < 0 && errno != ENOPROTOOPT)
- log_error_errno(errno, "Failed to determine peer security context: %m");
+ r = getpeersec(fd, &stream->label);
+ if (r < 0 && r != -EOPNOTSUPP)
+ (void) log_warning_errno(r, "Failed to determine peer security context: %m");
}
-#endif
(void) shutdown(fd, SHUT_WR);
diff --git a/src/libsystemd/sd-bus/bus-control.c b/src/libsystemd/sd-bus/bus-control.c
index b4ca177f76..1103903358 100644
--- a/src/libsystemd/sd-bus/bus-control.c
+++ b/src/libsystemd/sd-bus/bus-control.c
@@ -979,8 +979,10 @@ static int bus_get_owner_creds_dbus1(sd_bus *bus, uint64_t mask, sd_bus_creds **
_cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
pid_t pid = 0;
int r;
+ bool do_label = bus->label && (mask & SD_BUS_CREDS_SELINUX_CONTEXT);
- if (!bus->ucred_valid && isempty(bus->label))
+ /* Avoid allocating anything if we have no chance of returning useful data */
+ if (!bus->ucred_valid && !do_label)
return -ENODATA;
c = bus_creds_new();
@@ -1004,7 +1006,7 @@ static int bus_get_owner_creds_dbus1(sd_bus *bus, uint64_t mask, sd_bus_creds **
}
}
- if (!isempty(bus->label) && (mask & SD_BUS_CREDS_SELINUX_CONTEXT)) {
+ if (do_label) {
c->label = strdup(bus->label);
if (!c->label)
return -ENOMEM;
diff --git a/src/libsystemd/sd-bus/bus-creds.c b/src/libsystemd/sd-bus/bus-creds.c
index 4d67619cf8..1c365b7fcd 100644
--- a/src/libsystemd/sd-bus/bus-creds.c
+++ b/src/libsystemd/sd-bus/bus-creds.c
@@ -773,11 +773,13 @@ int bus_creds_add_more(sd_bus_creds *c, uint64_t mask, pid_t pid, pid_t tid) {
return 0;
/* Try to retrieve PID from creds if it wasn't passed to us */
- if (pid <= 0 && (c->mask & SD_BUS_CREDS_PID))
+ if (pid > 0) {
+ c->pid = pid;
+ c->mask |= SD_BUS_CREDS_PID;
+ } else if (c->mask & SD_BUS_CREDS_PID)
pid = c->pid;
-
- /* Without pid we cannot do much... */
- if (pid <= 0)
+ else
+ /* Without pid we cannot do much... */
return 0;
/* Try to retrieve TID from creds if it wasn't passed to us */
@@ -789,9 +791,6 @@ int bus_creds_add_more(sd_bus_creds *c, uint64_t mask, pid_t pid, pid_t tid) {
if (missing == 0)
return 0;
- c->pid = pid;
- c->mask |= SD_BUS_CREDS_PID;
-
if (tid > 0) {
c->tid = tid;
c->mask |= SD_BUS_CREDS_TID;
diff --git a/src/libsystemd/sd-bus/bus-internal.h b/src/libsystemd/sd-bus/bus-internal.h
index 1351938c80..2ee0eabc02 100644
--- a/src/libsystemd/sd-bus/bus-internal.h
+++ b/src/libsystemd/sd-bus/bus-internal.h
@@ -261,7 +261,7 @@ struct sd_bus {
usec_t auth_timeout;
struct ucred ucred;
- char label[NAME_MAX];
+ char *label;
uint64_t creds_mask;
diff --git a/src/libsystemd/sd-bus/bus-socket.c b/src/libsystemd/sd-bus/bus-socket.c
index 5209db8c4d..9f3756f0c2 100644
--- a/src/libsystemd/sd-bus/bus-socket.c
+++ b/src/libsystemd/sd-bus/bus-socket.c
@@ -500,9 +500,7 @@ static int bus_socket_read_auth(sd_bus *b) {
void *p;
union {
struct cmsghdr cmsghdr;
- uint8_t buf[CMSG_SPACE(sizeof(int) * BUS_FDS_MAX) +
- CMSG_SPACE(sizeof(struct ucred)) +
- CMSG_SPACE(NAME_MAX)]; /*selinux label */
+ uint8_t buf[CMSG_SPACE(sizeof(int) * BUS_FDS_MAX)];
} control;
struct cmsghdr *cmsg;
bool handle_cmsg = false;
@@ -554,8 +552,8 @@ static int bus_socket_read_auth(sd_bus *b) {
b->rbuffer_size += k;
- if (handle_cmsg) {
- for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
+ if (handle_cmsg)
+ for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg))
if (cmsg->cmsg_level == SOL_SOCKET &&
cmsg->cmsg_type == SCM_RIGHTS) {
int j;
@@ -566,31 +564,9 @@ static int bus_socket_read_auth(sd_bus *b) {
j = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
close_many((int*) CMSG_DATA(cmsg), j);
return -EIO;
-
- } else if (cmsg->cmsg_level == SOL_SOCKET &&
- cmsg->cmsg_type == SCM_CREDENTIALS &&
- cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
-
- /* Ignore bogus data, which we might
- * get on socketpair() sockets */
- if (((struct ucred*) CMSG_DATA(cmsg))->pid != 0) {
- memcpy(&b->ucred, CMSG_DATA(cmsg), sizeof(struct ucred));
- b->ucred_valid = true;
- }
-
- } else if (cmsg->cmsg_level == SOL_SOCKET &&
- cmsg->cmsg_type == SCM_SECURITY) {
-
- size_t l;
-
- l = cmsg->cmsg_len - CMSG_LEN(0);
- if (l > 0) {
- memcpy(&b->label, CMSG_DATA(cmsg), l);
- b->label[l] = 0;
- }
- }
- }
- }
+ } else
+ log_debug("Got unexpected auxiliary data with level=%d and type=%d",
+ cmsg->cmsg_level, cmsg->cmsg_type);
r = bus_socket_auth_verify(b);
if (r != 0)
@@ -600,18 +576,8 @@ static int bus_socket_read_auth(sd_bus *b) {
}
void bus_socket_setup(sd_bus *b) {
- int enable;
-
assert(b);
- /* Enable SO_PASSCRED + SO_PASSEC. We try this on any
- * socket, just in case. */
- enable = !b->bus_client;
- (void) setsockopt(b->input_fd, SOL_SOCKET, SO_PASSCRED, &enable, sizeof(enable));
-
- enable = !b->bus_client && (b->attach_flags & KDBUS_ATTACH_SECLABEL);
- (void) setsockopt(b->input_fd, SOL_SOCKET, SO_PASSSEC, &enable, sizeof(enable));
-
/* Increase the buffers to 8 MB */
fd_inc_rcvbuf(b->input_fd, SNDBUF_SIZE);
fd_inc_sndbuf(b->output_fd, SNDBUF_SIZE);
@@ -622,10 +588,17 @@ void bus_socket_setup(sd_bus *b) {
}
static void bus_get_peercred(sd_bus *b) {
+ int r;
+
assert(b);
/* Get the peer for socketpair() sockets */
b->ucred_valid = getpeercred(b->input_fd, &b->ucred) >= 0;
+
+ /* Get the SELinux context of the peer */
+ r = getpeersec(b->input_fd, &b->label);
+ if (r < 0 && r != -EOPNOTSUPP)
+ log_debug_errno(r, "Failed to determine peer security context: %m");
}
static int bus_socket_start_auth_client(sd_bus *b) {
@@ -941,9 +914,7 @@ int bus_socket_read_message(sd_bus *bus) {
void *b;
union {
struct cmsghdr cmsghdr;
- uint8_t buf[CMSG_SPACE(sizeof(int) * BUS_FDS_MAX) +
- CMSG_SPACE(sizeof(struct ucred)) +
- CMSG_SPACE(NAME_MAX)]; /*selinux label */
+ uint8_t buf[CMSG_SPACE(sizeof(int) * BUS_FDS_MAX)];
} control;
struct cmsghdr *cmsg;
bool handle_cmsg = false;
@@ -990,8 +961,8 @@ int bus_socket_read_message(sd_bus *bus) {
bus->rbuffer_size += k;
- if (handle_cmsg) {
- for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
+ if (handle_cmsg)
+ for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg))
if (cmsg->cmsg_level == SOL_SOCKET &&
cmsg->cmsg_type == SCM_RIGHTS) {
int n, *f;
@@ -1016,29 +987,9 @@ int bus_socket_read_message(sd_bus *bus) {
memcpy(f + bus->n_fds, CMSG_DATA(cmsg), n * sizeof(int));
bus->fds = f;
bus->n_fds += n;
- } else if (cmsg->cmsg_level == SOL_SOCKET &&
- cmsg->cmsg_type == SCM_CREDENTIALS &&
- cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
-
- /* Ignore bogus data, which we might
- * get on socketpair() sockets */
- if (((struct ucred*) CMSG_DATA(cmsg))->pid != 0) {
- memcpy(&bus->ucred, CMSG_DATA(cmsg), sizeof(struct ucred));
- bus->ucred_valid = true;
- }
-
- } else if (cmsg->cmsg_level == SOL_SOCKET &&
- cmsg->cmsg_type == SCM_SECURITY) {
-
- size_t l;
- l = cmsg->cmsg_len - CMSG_LEN(0);
- if (l > 0) {
- memcpy(&bus->label, CMSG_DATA(cmsg), l);
- bus->label[l] = 0;
- }
- }
- }
- }
+ } else
+ log_debug("Got unexpected auxiliary data with level=%d and type=%d",
+ cmsg->cmsg_level, cmsg->cmsg_type);
r = bus_socket_read_message_need(bus, &need);
if (r < 0)
diff --git a/src/libsystemd/sd-bus/sd-bus.c b/src/libsystemd/sd-bus/sd-bus.c
index 598b1be8a6..2805b29839 100644
--- a/src/libsystemd/sd-bus/sd-bus.c
+++ b/src/libsystemd/sd-bus/sd-bus.c
@@ -131,6 +131,7 @@ static void bus_free(sd_bus *b) {
if (b->kdbus_buffer)
munmap(b->kdbus_buffer, KDBUS_POOL_SIZE);
+ free(b->label);
free(b->rbuffer);
free(b->unique_name);
free(b->auth_buffer);
diff --git a/src/test/test-copy.c b/src/test/test-copy.c
index 403d85bff0..e55ffaa16a 100644
--- a/src/test/test-copy.c
+++ b/src/test/test-copy.c
@@ -133,10 +133,45 @@ static void test_copy_tree(void) {
(void) rm_rf(original_dir, REMOVE_ROOT|REMOVE_PHYSICAL);
}
+static void test_copy_bytes(void) {
+ _cleanup_close_pair_ int pipefd[2] = {-1, -1};
+ _cleanup_close_ int infd = -1;
+ int r, r2;
+ char buf[1024], buf2[1024];
+
+ infd = open("/etc/os-release", O_RDONLY|O_CLOEXEC);
+ assert_se(infd >= 0);
+
+ assert_se(pipe2(pipefd, O_CLOEXEC) == 0);
+
+ r = copy_bytes(infd, pipefd[1], (off_t) -1, false);
+ assert_se(r == 0);
+
+ r = read(pipefd[0], buf, sizeof(buf));
+ assert_se(r >= 0);
+
+ assert_se(lseek(infd, 0, SEEK_SET) == 0);
+ r2 = read(infd, buf2, sizeof(buf2));
+ assert_se(r == r2);
+
+ assert_se(strneq(buf, buf2, r));
+
+ /* test copy_bytes with invalid descriptors */
+ r = copy_bytes(pipefd[0], pipefd[0], 1, false);
+ assert_se(r == -EBADF);
+
+ r = copy_bytes(pipefd[1], pipefd[1], 1, false);
+ assert_se(r == -EBADF);
+
+ r = copy_bytes(pipefd[1], infd, 1, false);
+ assert_se(r == -EBADF);
+}
+
int main(int argc, char *argv[]) {
test_copy_file();
test_copy_file_fd();
test_copy_tree();
+ test_copy_bytes();
return 0;
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-15 13:18:13 +0000