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-rw-r--r--src/bus-proxyd/bus-proxyd.c33
1 files changed, 24 insertions, 9 deletions
diff --git a/src/bus-proxyd/bus-proxyd.c b/src/bus-proxyd/bus-proxyd.c
index 44e16fcd15..21cd4e29d2 100644
--- a/src/bus-proxyd/bus-proxyd.c
+++ b/src/bus-proxyd/bus-proxyd.c
@@ -1605,14 +1605,26 @@ int main(int argc, char *argv[]) {
if (!processed) {
k = sd_bus_send(b, m, NULL);
if (k < 0) {
- if (k == -ECONNRESET)
+ if (k == -ECONNRESET) {
r = 0;
- else {
+ goto finish;
+ } else if (k == -EPERM && m->reply_cookie > 0) {
+ /* If the peer tries to send a reply and it is rejected with EPERM
+ * by the kernel, we ignore the error. This catches cases where the
+ * original method-call didn't had EXPECT_REPLY set, but the proxy-peer
+ * still sends a reply. This is allowed in dbus1, but not in kdbus. We
+ * don't want to track reply-windows in the proxy, so we simply ignore
+ * EPERM for all replies. The only downside is, that callers are no
+ * longer notified if their replies are dropped. However, this is
+ * equivalent to the caller's timeout to expire, so this should be
+ * acceptable. Nobody sane sends replies without a matching method-call,
+ * so nobody should care. */
+ r = 1;
+ } else {
r = k;
log_error_errno(r, "Failed to send message to client: %m");
+ goto finish;
}
-
- goto finish;
} else
r = 1;
}
@@ -1682,17 +1694,20 @@ int main(int argc, char *argv[]) {
k = sd_bus_send(a, m, NULL);
if (k < 0) {
- if (k == -EREMCHG)
+ if (k == -EREMCHG) {
/* The name database changed since the policy check, hence let's check again */
continue;
- else if (k == -ECONNRESET)
+ } else if (k == -ECONNRESET) {
r = 0;
- else {
+ goto finish;
+ } else if (k == -EPERM && m->reply_cookie > 0) {
+ /* see above why EPERM is ignored for replies */
+ r = 1;
+ } else {
r = k;
log_error_errno(r, "Failed to send message to bus: %m");
+ goto finish;
}
-
- goto finish;
} else
r = 1;