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-rw-r--r--src/basic/socket-util.c18
-rw-r--r--src/basic/socket-util.h9
-rw-r--r--src/boot/efi/pe.c2
-rw-r--r--src/fundamental/macro-fundamental.h11
-rw-r--r--src/journal/journald-server.c6
-rw-r--r--src/libsystemd-network/icmp6-util.c8
-rw-r--r--src/libsystemd-network/sd-dhcp-server.c20
-rw-r--r--src/libsystemd-network/sd-dhcp6-client.c10
-rw-r--r--src/libsystemd/sd-daemon/sd-daemon.c2
-rw-r--r--src/network/networkd-nexthop.c2
-rw-r--r--src/resolve/resolved-manager.c4
-rw-r--r--src/test/test-sizeof.c10
-rw-r--r--src/timesync/timesyncd-manager.c4
13 files changed, 59 insertions, 47 deletions
diff --git a/src/basic/socket-util.c b/src/basic/socket-util.c
index b35de4dad6..5b76948c06 100644
--- a/src/basic/socket-util.c
+++ b/src/basic/socket-util.c
@@ -1171,6 +1171,24 @@ struct cmsghdr* cmsg_find(struct msghdr *mh, int level, int type, socklen_t leng
return NULL;
}
+void* cmsg_find_and_copy_data(struct msghdr *mh, int level, int type, void *buf, size_t buf_len) {
+ struct cmsghdr *cmsg;
+
+ assert(mh);
+ assert(buf);
+ assert(buf_len > 0);
+
+ /* This is similar to cmsg_find_data(), but copy the found data to buf. This should be typically used
+ * when reading possibly unaligned data such as timestamp, as time_t is 64bit and size_t is 32bit on
+ * RISCV32. See issue #27241. */
+
+ cmsg = cmsg_find(mh, level, type, CMSG_LEN(buf_len));
+ if (!cmsg)
+ return NULL;
+
+ return memcpy_safe(buf, CMSG_DATA(cmsg), buf_len);
+}
+
int socket_ioctl_fd(void) {
int fd;
diff --git a/src/basic/socket-util.h b/src/basic/socket-util.h
index 7d504319a8..b323b1b99f 100644
--- a/src/basic/socket-util.h
+++ b/src/basic/socket-util.h
@@ -183,17 +183,22 @@ int flush_accept(int fd);
* riscv32. */
#define CMSG_TYPED_DATA(cmsg, type) \
({ \
- struct cmsghdr *_cmsg = cmsg; \
- assert_cc(__alignof__(type) <= __alignof__(struct cmsghdr)); \
+ struct cmsghdr *_cmsg = (cmsg); \
+ assert_cc(alignof(type) <= alignof(struct cmsghdr)); \
_cmsg ? CAST_ALIGN_PTR(type, CMSG_DATA(_cmsg)) : (type*) NULL; \
})
struct cmsghdr* cmsg_find(struct msghdr *mh, int level, int type, socklen_t length);
+void* cmsg_find_and_copy_data(struct msghdr *mh, int level, int type, void *buf, size_t buf_len);
/* Type-safe, dereferencing version of cmsg_find() */
#define CMSG_FIND_DATA(mh, level, type, ctype) \
CMSG_TYPED_DATA(cmsg_find(mh, level, type, CMSG_LEN(sizeof(ctype))), ctype)
+/* Type-safe version of cmsg_find_and_copy_data() */
+#define CMSG_FIND_AND_COPY_DATA(mh, level, type, ctype) \
+ (ctype*) cmsg_find_and_copy_data(mh, level, type, &(ctype){}, sizeof(ctype))
+
/* Resolves to a type that can carry cmsghdr structures. Make sure things are properly aligned, i.e. the type
* itself is placed properly in memory and the size is also aligned to what's appropriate for "cmsghdr"
* structures. */
diff --git a/src/boot/efi/pe.c b/src/boot/efi/pe.c
index e516417c07..9759d036b3 100644
--- a/src/boot/efi/pe.c
+++ b/src/boot/efi/pe.c
@@ -191,7 +191,7 @@ static uint32_t get_compatibility_entry_address(const DosFileHeader *dos, const
uint32_t entry_point;
} _packed_ LinuxPeCompat1;
- while (size >= sizeof(LinuxPeCompat1) && addr % __alignof__(LinuxPeCompat1) == 0) {
+ while (size >= sizeof(LinuxPeCompat1) && addr % alignof(LinuxPeCompat1) == 0) {
LinuxPeCompat1 *compat = (LinuxPeCompat1 *) ((uint8_t *) dos + addr);
if (compat->type == 0 || compat->size == 0 || compat->size > size)
diff --git a/src/fundamental/macro-fundamental.h b/src/fundamental/macro-fundamental.h
index fa5b5d221a..e901e8fb59 100644
--- a/src/fundamental/macro-fundamental.h
+++ b/src/fundamental/macro-fundamental.h
@@ -6,12 +6,13 @@
#endif
#include <limits.h>
+#include <stdalign.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#define _align_(x) __attribute__((__aligned__(x)))
-#define _alignas_(x) __attribute__((__aligned__(__alignof__(x))))
+#define _alignas_(x) __attribute__((__aligned__(alignof(x))))
#define _alignptr_ __attribute__((__aligned__(sizeof(void *))))
#define _cleanup_(x) __attribute__((__cleanup__(x)))
#define _const_ __attribute__((__const__))
@@ -343,9 +344,9 @@ static inline size_t ALIGN_TO(size_t l, size_t ali) {
#define ALIGN_PTR(p) ((void*) ALIGN((uintptr_t) (p)))
/* Checks if the specified pointer is aligned as appropriate for the specific type */
-#define IS_ALIGNED16(p) (((uintptr_t) p) % __alignof__(uint16_t) == 0)
-#define IS_ALIGNED32(p) (((uintptr_t) p) % __alignof__(uint32_t) == 0)
-#define IS_ALIGNED64(p) (((uintptr_t) p) % __alignof__(uint64_t) == 0)
+#define IS_ALIGNED16(p) (((uintptr_t) p) % alignof(uint16_t) == 0)
+#define IS_ALIGNED32(p) (((uintptr_t) p) % alignof(uint32_t) == 0)
+#define IS_ALIGNED64(p) (((uintptr_t) p) % alignof(uint64_t) == 0)
/* Same as ALIGN_TO but callable in constant contexts. */
#define CONST_ALIGN_TO(l, ali) \
@@ -363,7 +364,7 @@ static inline size_t ALIGN_TO(size_t l, size_t ali) {
#define CAST_ALIGN_PTR(t, p) \
({ \
const void *_p = (p); \
- assert(((uintptr_t) _p) % __alignof__(t) == 0); \
+ assert(((uintptr_t) _p) % alignof(t) == 0); \
(t *) _p; \
})
diff --git a/src/journal/journald-server.c b/src/journal/journald-server.c
index b952269e2e..7be3763f15 100644
--- a/src/journal/journald-server.c
+++ b/src/journal/journald-server.c
@@ -1417,7 +1417,7 @@ int server_process_datagram(
size_t label_len = 0, m;
Server *s = ASSERT_PTR(userdata);
struct ucred *ucred = NULL;
- struct timeval *tv = NULL;
+ struct timeval tv_buf, *tv = NULL;
struct cmsghdr *cmsg;
char *label = NULL;
struct iovec iovec;
@@ -1493,10 +1493,10 @@ int server_process_datagram(
label = CMSG_TYPED_DATA(cmsg, char);
label_len = cmsg->cmsg_len - CMSG_LEN(0);
} else if (cmsg->cmsg_level == SOL_SOCKET &&
- cmsg->cmsg_type == SO_TIMESTAMP &&
+ cmsg->cmsg_type == SCM_TIMESTAMP &&
cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval))) {
assert(!tv);
- tv = CMSG_TYPED_DATA(cmsg, struct timeval);
+ tv = memcpy(&tv_buf, CMSG_DATA(cmsg), sizeof(struct timeval));
} else if (cmsg->cmsg_level == SOL_SOCKET &&
cmsg->cmsg_type == SCM_RIGHTS) {
assert(!fds);
diff --git a/src/libsystemd-network/icmp6-util.c b/src/libsystemd-network/icmp6-util.c
index fba5c3bd96..ecddab61e4 100644
--- a/src/libsystemd-network/icmp6-util.c
+++ b/src/libsystemd-network/icmp6-util.c
@@ -199,9 +199,11 @@ int icmp6_receive(int fd, void *buffer, size_t size, struct in6_addr *ret_dst,
}
if (cmsg->cmsg_level == SOL_SOCKET &&
- cmsg->cmsg_type == SO_TIMESTAMP &&
- cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval)))
- triple_timestamp_from_realtime(&t, timeval_load(CMSG_TYPED_DATA(cmsg, struct timeval)));
+ cmsg->cmsg_type == SCM_TIMESTAMP &&
+ cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval))) {
+ struct timeval *tv = memcpy(&(struct timeval) {}, CMSG_DATA(cmsg), sizeof(struct timeval));
+ triple_timestamp_from_realtime(&t, timeval_load(tv));
+ }
}
if (!triple_timestamp_is_set(&t))
diff --git a/src/libsystemd-network/sd-dhcp-server.c b/src/libsystemd-network/sd-dhcp-server.c
index 15a0145959..05c0cddfd0 100644
--- a/src/libsystemd-network/sd-dhcp-server.c
+++ b/src/libsystemd-network/sd-dhcp-server.c
@@ -407,7 +407,7 @@ static int dhcp_server_send_udp(sd_dhcp_server *server, be32_t destination,
rather than binding the socket. This will be mostly useful
when we gain support for arbitrary number of server addresses
*/
- pktinfo = (struct in_pktinfo*) CMSG_DATA(cmsg);
+ pktinfo = CMSG_TYPED_DATA(cmsg, struct in_pktinfo);
assert(pktinfo);
pktinfo->ipi_ifindex = server->ifindex;
@@ -1270,7 +1270,6 @@ static int server_receive_message(sd_event_source *s, int fd,
.msg_control = &control,
.msg_controllen = sizeof(control),
};
- struct cmsghdr *cmsg;
ssize_t datagram_size, len;
int r;
@@ -1306,19 +1305,10 @@ static int server_receive_message(sd_event_source *s, int fd,
if ((size_t) len < sizeof(DHCPMessage))
return 0;
- CMSG_FOREACH(cmsg, &msg)
- if (cmsg->cmsg_level == IPPROTO_IP &&
- cmsg->cmsg_type == IP_PKTINFO &&
- cmsg->cmsg_len == CMSG_LEN(sizeof(struct in_pktinfo))) {
- struct in_pktinfo *info = CMSG_TYPED_DATA(cmsg, struct in_pktinfo);
-
- /* TODO figure out if this can be done as a filter on
- * the socket, like for IPv6 */
- if (server->ifindex != info->ipi_ifindex)
- return 0;
-
- break;
- }
+ /* TODO figure out if this can be done as a filter on the socket, like for IPv6 */
+ struct in_pktinfo *info = CMSG_FIND_DATA(&msg, IPPROTO_IP, IP_PKTINFO, struct in_pktinfo);
+ if (info && info->ipi_ifindex != server->ifindex)
+ return 0;
if (sd_dhcp_server_is_in_relay_mode(server)) {
r = dhcp_server_relay_message(server, message, len - sizeof(DHCPMessage), buflen);
diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
index 57dd91f81f..6d62ba380b 100644
--- a/src/libsystemd-network/sd-dhcp6-client.c
+++ b/src/libsystemd-network/sd-dhcp6-client.c
@@ -1276,7 +1276,6 @@ static int client_receive_message(
.msg_control = &control,
.msg_controllen = sizeof(control),
};
- struct cmsghdr *cmsg;
triple_timestamp t = {};
_cleanup_free_ DHCP6Message *message = NULL;
struct in6_addr *server_address = NULL;
@@ -1320,12 +1319,9 @@ static int client_receive_message(
server_address = &sa.in6.sin6_addr;
}
- CMSG_FOREACH(cmsg, &msg) {
- if (cmsg->cmsg_level == SOL_SOCKET &&
- cmsg->cmsg_type == SO_TIMESTAMP &&
- cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval)))
- triple_timestamp_from_realtime(&t, timeval_load(CMSG_TYPED_DATA(cmsg, struct timeval)));
- }
+ struct timeval *tv = CMSG_FIND_AND_COPY_DATA(&msg, SOL_SOCKET, SCM_TIMESTAMP, struct timeval);
+ if (tv)
+ triple_timestamp_from_realtime(&t, timeval_load(tv));
if (client->transaction_id != (message->transaction_id & htobe32(0x00ffffff)))
return 0;
diff --git a/src/libsystemd/sd-daemon/sd-daemon.c b/src/libsystemd/sd-daemon/sd-daemon.c
index 8dc11aeb30..f2f295d6e4 100644
--- a/src/libsystemd/sd-daemon/sd-daemon.c
+++ b/src/libsystemd/sd-daemon/sd-daemon.c
@@ -567,7 +567,7 @@ _public_ int sd_pid_notify_with_fds(
cmsg->cmsg_type = SCM_CREDENTIALS;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred));
- ucred = (struct ucred*) CMSG_DATA(cmsg);
+ ucred = CMSG_TYPED_DATA(cmsg, struct ucred);
ucred->pid = pid != 0 ? pid : getpid_cached();
ucred->uid = getuid();
ucred->gid = getgid();
diff --git a/src/network/networkd-nexthop.c b/src/network/networkd-nexthop.c
index d82766702a..0820e0db2d 100644
--- a/src/network/networkd-nexthop.c
+++ b/src/network/networkd-nexthop.c
@@ -894,7 +894,7 @@ int manager_rtnl_process_nexthop(sd_netlink *rtnl, sd_netlink_message *message,
return 0;
}
- assert((uintptr_t) group % __alignof__(struct nexthop_grp) == 0);
+ assert((uintptr_t) group % alignof(struct nexthop_grp) == 0);
n_group = raw_group_size / sizeof(struct nexthop_grp);
for (size_t i = 0; i < n_group; i++) {
diff --git a/src/resolve/resolved-manager.c b/src/resolve/resolved-manager.c
index e5e1411a13..184d8e3f3d 100644
--- a/src/resolve/resolved-manager.c
+++ b/src/resolve/resolved-manager.c
@@ -1017,7 +1017,7 @@ static int manager_ipv4_send(
cmsg->cmsg_level = IPPROTO_IP;
cmsg->cmsg_type = IP_PKTINFO;
- pi = (struct in_pktinfo*) CMSG_DATA(cmsg);
+ pi = CMSG_TYPED_DATA(cmsg, struct in_pktinfo);
pi->ipi_ifindex = ifindex;
if (source)
@@ -1073,7 +1073,7 @@ static int manager_ipv6_send(
cmsg->cmsg_level = IPPROTO_IPV6;
cmsg->cmsg_type = IPV6_PKTINFO;
- pi = (struct in6_pktinfo*) CMSG_DATA(cmsg);
+ pi = CMSG_TYPED_DATA(cmsg, struct in6_pktinfo);
pi->ipi6_ifindex = ifindex;
if (source)
diff --git a/src/test/test-sizeof.c b/src/test/test-sizeof.c
index 55bd81e22f..30b252ecd9 100644
--- a/src/test/test-sizeof.c
+++ b/src/test/test-sizeof.c
@@ -17,16 +17,16 @@
DISABLE_WARNING_TYPE_LIMITS;
#define info_no_sign(t) \
- printf("%s → %zu bits, %zu byte alignment\n", STRINGIFY(t), \
+ printf("%s → %zu bits, %zu byte alignment\n", STRINGIFY(t), \
sizeof(t)*CHAR_BIT, \
- __alignof__(t))
+ alignof(t))
#define info(t) \
- printf("%s → %zu bits%s, %zu byte alignment\n", STRINGIFY(t), \
+ printf("%s → %zu bits%s, %zu byte alignment\n", STRINGIFY(t), \
sizeof(t)*CHAR_BIT, \
strstr(STRINGIFY(t), "signed") ? "" : \
(t)-1 < (t)0 ? ", signed" : ", unsigned", \
- __alignof__(t))
+ alignof(t))
enum Enum {
enum_value,
@@ -44,7 +44,7 @@ enum BigEnum2 {
int main(void) {
int (*function_pointer)(void);
- info_no_sign(function_pointer);
+ info_no_sign(typeof(function_pointer));
info_no_sign(void*);
info(char*);
diff --git a/src/timesync/timesyncd-manager.c b/src/timesync/timesyncd-manager.c
index b8cc6f4ead..569389b9d4 100644
--- a/src/timesync/timesyncd-manager.c
+++ b/src/timesync/timesyncd-manager.c
@@ -411,7 +411,7 @@ static int manager_receive_response(sd_event_source *source, int fd, uint32_t re
.msg_name = &server_addr,
.msg_namelen = sizeof(server_addr),
};
- struct timespec *recv_time = NULL;
+ struct timespec *recv_time;
triple_timestamp dts;
ssize_t len;
double origin, receive, trans, dest, delay, offset, root_distance;
@@ -446,7 +446,7 @@ static int manager_receive_response(sd_event_source *source, int fd, uint32_t re
return 0;
}
- recv_time = CMSG_FIND_DATA(&msghdr, SOL_SOCKET, SCM_TIMESTAMPNS, struct timespec);
+ recv_time = CMSG_FIND_AND_COPY_DATA(&msghdr, SOL_SOCKET, SCM_TIMESTAMPNS, struct timespec);
if (!recv_time)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Packet timestamp missing.");