Mesa (master): st/mesa: remove redundant stfb->iface checks
Nicolai Hähnle
nh at kemper.freedesktop.org
Fri Apr 28 09:34:12 UTC 2017
Module: Mesa
Branch: master
Commit: 9d346af322e3f9d6d52e00759e8c3cd37c192004
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=9d346af322e3f9d6d52e00759e8c3cd37c192004
Author: Nicolai Hähnle <nicolai.haehnle at amd.com>
Date: Fri Apr 21 15:11:34 2017 +0200
st/mesa: remove redundant stfb->iface checks
stfb->iface is always non-NULL for an st_framebuffer. These checks
were incorrect, relying on out-of-bounds memory access in the
surface-less case of EGL_KHR_surfaceless_context.
v2: remove redundant stread check (Marek)
Reviewed-by: Marek Olšák <marek at olsak@amd.com> (v2)
---
src/mesa/state_tracker/st_cb_viewport.c | 4 ++--
src/mesa/state_tracker/st_manager.c | 7 -------
2 files changed, 2 insertions(+), 9 deletions(-)
diff --git a/src/mesa/state_tracker/st_cb_viewport.c b/src/mesa/state_tracker/st_cb_viewport.c
index ff18fd0e6a..8b50350fab 100644
--- a/src/mesa/state_tracker/st_cb_viewport.c
+++ b/src/mesa/state_tracker/st_cb_viewport.c
@@ -54,9 +54,9 @@ static void st_viewport(struct gl_context *ctx)
stdraw = st_ws_framebuffer(st->ctx->DrawBuffer);
stread = st_ws_framebuffer(st->ctx->ReadBuffer);
- if (stdraw && stdraw->iface)
+ if (stdraw)
stdraw->iface_stamp = p_atomic_read(&stdraw->iface->stamp) - 1;
- if (stread && stread != stdraw && stread->iface)
+ if (stread && stread != stdraw)
stread->iface_stamp = p_atomic_read(&stread->iface->stamp) - 1;
}
diff --git a/src/mesa/state_tracker/st_manager.c b/src/mesa/state_tracker/st_manager.c
index 2ba7de6c63..90e4177f69 100644
--- a/src/mesa/state_tracker/st_manager.c
+++ b/src/mesa/state_tracker/st_manager.c
@@ -176,10 +176,6 @@ st_framebuffer_validate(struct st_framebuffer *stfb,
boolean changed = FALSE;
int32_t new_stamp;
- /* Check for incomplete framebuffers (e.g. EGL_KHR_surfaceless_context) */
- if (!stfb->iface)
- return;
-
new_stamp = p_atomic_read(&stfb->iface->stamp);
if (stfb->iface_stamp == new_stamp)
return;
@@ -281,9 +277,6 @@ st_framebuffer_add_renderbuffer(struct st_framebuffer *stfb,
enum pipe_format format;
boolean sw;
- if (!stfb->iface)
- return FALSE;
-
assert(_mesa_is_winsys_fbo(&stfb->Base));
/* do not distinguish depth/stencil buffers */
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