The beginning of the surface data needs to be computed correctly if the stride is negative, otherwise, it should point already to the beginning of the surface data. This bug seems to exists since 4a208b (0.5.2) https://bugzilla.redhat.com/show_bug.cgi?id=1029646 --- server/red_worker.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/server/red_worker.c b/server/red_worker.c index 6bdad93..35a1a04 100644 --- a/server/red_worker.c +++ b/server/red_worker.c @@ -9470,7 +9470,11 @@ static inline void red_create_surface(RedWorker *worker, uint32_t surface_id, ui surface->context.stride = stride; surface->context.line_0 = line_0; if (!data_is_valid) { - memset((char *)line_0 + (int32_t)(stride * (height - 1)), 0, height*abs(stride)); + char *data = line_0; + if (stride < 0) { + data -= abs(stride) * (height - 1); + } + memset(data, 0, height*abs(stride)); } surface->create.info = NULL; surface->destroy.info = NULL; -- 1.9.3 _______________________________________________ Spice-devel mailing list Spice-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/spice-devel