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systemd/0003-sd-bus-don-t-look-for-a-64bit-value-when-we-only-hav.patch

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From 42c4ebcbd4cbd7b27667eb8081ee4dc46f9ece17 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 13 Mar 2014 20:33:22 +0100
Subject: [PATCH] sd-bus: don't look for a 64bit value when we only have 32bit
value on reply cookie hash table access
This broke hashtable lookups for the message cookies on s390x, which is
a 64bit BE machine where accessing 32bit values as 64bit and vice versa
will explode.
Also, while we are at it, be a bit more careful when dealing with the
64bit cookies we expose and the 32bit serial numbers dbus uses in its
payload.
Problem identified by Fridrich Strba.
---
src/libsystemd/sd-bus/bus-dump.c | 4 ++--
src/libsystemd/sd-bus/bus-kernel.c | 2 +-
src/libsystemd/sd-bus/bus-message.c | 15 ++++++++++-----
src/libsystemd/sd-bus/bus-message.h | 5 +++--
src/libsystemd/sd-bus/sd-bus.c | 12 ++++++------
5 files changed, 22 insertions(+), 16 deletions(-)
diff --git src/libsystemd/sd-bus/bus-dump.c src/libsystemd/sd-bus/bus-dump.c
index 0e41549..ea81644 100644
--- src/libsystemd/sd-bus/bus-dump.c
+++ src/libsystemd/sd-bus/bus-dump.c
@@ -69,10 +69,10 @@ int bus_message_dump(sd_bus_message *m, FILE *f, bool with_header) {
if (BUS_MESSAGE_COOKIE(m) == 0xFFFFFFFFULL)
fprintf(f, " Cookie=-1");
else
- fprintf(f, " Cookie=%lu", (unsigned long) BUS_MESSAGE_COOKIE(m));
+ fprintf(f, " Cookie=%" PRIu64, BUS_MESSAGE_COOKIE(m));
if (m->reply_cookie != 0)
- fprintf(f, " ReplyCookie=%lu", (unsigned long) m->reply_cookie);
+ fprintf(f, " ReplyCookie=%" PRIu64, m->reply_cookie);
fputs("\n", f);
diff --git src/libsystemd/sd-bus/bus-kernel.c src/libsystemd/sd-bus/bus-kernel.c
index 8a2ca02..80ef15b 100644
--- src/libsystemd/sd-bus/bus-kernel.c
+++ src/libsystemd/sd-bus/bus-kernel.c
@@ -266,7 +266,7 @@ static int bus_message_setup_kmsg(sd_bus *b, sd_bus_message *m) {
well_known ? 0 :
m->destination ? unique : KDBUS_DST_ID_BROADCAST;
m->kdbus->payload_type = KDBUS_PAYLOAD_DBUS;
- m->kdbus->cookie = m->header->serial;
+ m->kdbus->cookie = (uint64_t) m->header->serial;
m->kdbus->priority = m->priority;
if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
diff --git src/libsystemd/sd-bus/bus-message.c src/libsystemd/sd-bus/bus-message.c
index fb894ef..97ab0e3 100644
--- src/libsystemd/sd-bus/bus-message.c
+++ src/libsystemd/sd-bus/bus-message.c
@@ -617,7 +617,7 @@ static int message_new_reply(
t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED;
t->reply_cookie = BUS_MESSAGE_COOKIE(call);
- r = message_append_field_uint32(t, BUS_MESSAGE_HEADER_REPLY_SERIAL, t->reply_cookie);
+ r = message_append_field_uint32(t, BUS_MESSAGE_HEADER_REPLY_SERIAL, (uint32_t) t->reply_cookie);
if (r < 0)
goto fail;
@@ -752,7 +752,7 @@ int bus_message_new_synthetic_error(
t->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED;
t->reply_cookie = cookie;
- r = message_append_field_uint32(t, BUS_MESSAGE_HEADER_REPLY_SERIAL, t->reply_cookie);
+ r = message_append_field_uint32(t, BUS_MESSAGE_HEADER_REPLY_SERIAL, (uint32_t) t->reply_cookie);
if (r < 0)
goto fail;
@@ -5075,21 +5075,26 @@ int bus_message_parse_fields(sd_bus_message *m) {
break;
}
- case BUS_MESSAGE_HEADER_REPLY_SERIAL:
+ case BUS_MESSAGE_HEADER_REPLY_SERIAL: {
+ uint32_t serial;
+
if (m->reply_cookie != 0)
return -EBADMSG;
if (!streq(signature, "u"))
return -EBADMSG;
- r = message_peek_field_uint32(m, &ri, item_size, &m->reply_cookie);
+ r = message_peek_field_uint32(m, &ri, item_size, &serial);
if (r < 0)
return r;
+ m->reply_cookie = serial;
+
if (m->reply_cookie == 0)
return -EBADMSG;
break;
+ }
case BUS_MESSAGE_HEADER_UNIX_FDS:
if (unix_fds != 0)
@@ -5489,7 +5494,7 @@ int bus_message_remarshal(sd_bus *bus, sd_bus_message **m) {
return -ENOMEM;
n->reply_cookie = (*m)->reply_cookie;
- r = message_append_field_uint32(n, BUS_MESSAGE_HEADER_REPLY_SERIAL, n->reply_cookie);
+ r = message_append_field_uint32(n, BUS_MESSAGE_HEADER_REPLY_SERIAL, (uint32_t) n->reply_cookie);
if (r < 0)
return r;
diff --git src/libsystemd/sd-bus/bus-message.h src/libsystemd/sd-bus/bus-message.h
index 5fbe3e6..df79294 100644
--- src/libsystemd/sd-bus/bus-message.h
+++ src/libsystemd/sd-bus/bus-message.h
@@ -84,7 +84,7 @@ struct sd_bus_message {
sd_bus *bus;
- uint32_t reply_cookie;
+ uint64_t reply_cookie;
const char *path;
const char *interface;
@@ -162,7 +162,8 @@ static inline uint64_t BUS_MESSAGE_BSWAP64(sd_bus_message *m, uint64_t u) {
return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_64(u) : u;
}
-static inline uint32_t BUS_MESSAGE_COOKIE(sd_bus_message *m) {
+static inline uint64_t BUS_MESSAGE_COOKIE(sd_bus_message *m) {
+ /* Note that we return the serial converted to a 64bit value here */
return BUS_MESSAGE_BSWAP32(m, m->header->serial);
}
diff --git src/libsystemd/sd-bus/sd-bus.c src/libsystemd/sd-bus/sd-bus.c
index ca7c428..8e44e50 100644
--- src/libsystemd/sd-bus/sd-bus.c
+++ src/libsystemd/sd-bus/sd-bus.c
@@ -1486,15 +1486,15 @@ static int bus_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call
return r;
if (bus->is_kernel || *idx >= BUS_MESSAGE_SIZE(m))
- log_debug("Sent message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%lu reply_cookie=%lu error=%s",
+ log_debug("Sent message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error=%s",
bus_message_type_to_string(m->header->type),
strna(sd_bus_message_get_sender(m)),
strna(sd_bus_message_get_destination(m)),
strna(sd_bus_message_get_path(m)),
strna(sd_bus_message_get_interface(m)),
strna(sd_bus_message_get_member(m)),
- (unsigned long) BUS_MESSAGE_COOKIE(m),
- (unsigned long) m->reply_cookie,
+ BUS_MESSAGE_COOKIE(m),
+ m->reply_cookie,
strna(m->error.message));
return r;
@@ -2253,15 +2253,15 @@ static int process_message(sd_bus *bus, sd_bus_message *m) {
bus->current = m;
bus->iteration_counter++;
- log_debug("Got message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%lu reply_cookie=%lu error=%s",
+ log_debug("Got message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error=%s",
bus_message_type_to_string(m->header->type),
strna(sd_bus_message_get_sender(m)),
strna(sd_bus_message_get_destination(m)),
strna(sd_bus_message_get_path(m)),
strna(sd_bus_message_get_interface(m)),
strna(sd_bus_message_get_member(m)),
- (unsigned long) BUS_MESSAGE_COOKIE(m),
- (unsigned long) m->reply_cookie,
+ BUS_MESSAGE_COOKIE(m),
+ m->reply_cookie,
strna(m->error.message));
r = process_hello(bus, m);
--
1.7.9.2
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