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Log to syslog when pending_fd_timeout is exceeded

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This is either a denial-of-service attempt, a pathological performance
problem or a dbus-daemon bug. Sysadmins should be told about any of
these.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=86442
[smcv: add units to timeout: it is in milliseconds]
Signed-off-by: Simon McVittie <smcv@debian.org>
This commit is contained in:
Simon McVittie 2016-08-16 16:12:35 +01:00
parent 3bc74092ca
commit 05cb619f0a
1 changed files with 12 additions and 0 deletions
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12
bus/connection.c
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@ -671,6 +671,18 @@ static dbus_bool_t
pending_unix_fds_timeout_cb (void *data)
{
DBusConnection *connection = data;
BusConnectionData *d = BUS_CONNECTION_DATA (connection);
int limit;
_dbus_assert (d != NULL);
limit = bus_context_get_pending_fd_timeout (d->connections->context);
bus_context_log (d->connections->context, DBUS_SYSTEM_LOG_WARNING,
"Connection \"%s\" (%s) has had Unix fds pending for too long, "
"closing it (pending_fd_timeout=%d ms)",
d->name != NULL ? d->name : "(null)",
bus_connection_get_loginfo (connection),
limit);
dbus_connection_close (connection);
return TRUE;
}