diff options
Diffstat (limited to 'hw/display/qxl.c')
| -rw-r--r-- | hw/display/qxl.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/hw/display/qxl.c b/hw/display/qxl.c index 8e9a65e75b..da8fd5a40a 100644 --- a/hw/display/qxl.c +++ b/hw/display/qxl.c @@ -1763,10 +1763,16 @@ async_common: qxl_set_mode(d, val, 0); break; case QXL_IO_LOG: - trace_qxl_io_log(d->id, d->ram->log_buf); - if (d->guestdebug) { - fprintf(stderr, "qxl/guest-%d: %" PRId64 ": %s", d->id, - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), d->ram->log_buf); + if (TRACE_QXL_IO_LOG_ENABLED || d->guestdebug) { + /* We cannot trust the guest to NUL terminate d->ram->log_buf */ + char *log_buf = g_strndup((const char *)d->ram->log_buf, + sizeof(d->ram->log_buf)); + trace_qxl_io_log(d->id, log_buf); + if (d->guestdebug) { + fprintf(stderr, "qxl/guest-%d: %" PRId64 ": %s", d->id, + qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), log_buf); + } + g_free(log_buf); } break; case QXL_IO_RESET: |