Patches from upstream for Xwayland
This commit is contained in:
Olivier Fourdan
parent
a237e8dbd7
commit
b25ac7f75c
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From 2881ce563661043ef0ee1163c63c120f3622e6d1 Mon Sep 17 00:00:00 2001
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From: Olivier Fourdan <ofourdan@redhat.com>
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Date: Wed, 5 Sep 2018 15:06:55 +0200
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Subject: [PATCH xserver] glx: check for indirect context in
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CreateContextAttribsARB()
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Commit 99f0365b "Add a command line argument for disabling indirect GLX"
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added a test to check if indirect context are enabled in
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`DoCreateContext()` but `__glXDisp_CreateContextAttribsARB()` doesn't
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use `DoCreateContext()` and doesn't check if indirect context is
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enabled.
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As a result, clients can still manage to create indirect contexts using
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`glXCreateContextAttribsARB()` even if indirect contexts are disabled,
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which can possibly crash Xservers such as Xwayland or Xephyr when the
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context is destroyed.
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To avoid the issue, check for `enableIndirectGLX` in
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`__glXDisp_CreateContextAttribsARB()` as well.
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Fixes: 99f0365b "Add a command line argument for disabling indirect GLX"
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Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107508
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Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
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---
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glx/createcontext.c | 12 ++++++++++++
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1 file changed, 12 insertions(+)
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diff --git a/glx/createcontext.c b/glx/createcontext.c
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index 7d09c3a1c..24b02ddfb 100644
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--- a/glx/createcontext.c
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+++ b/glx/createcontext.c
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@@ -28,6 +28,7 @@
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#include "glxserver.h"
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#include "glxext.h"
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#include "indirect_dispatch.h"
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+#include "opaque.h"
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#define ALL_VALID_FLAGS \
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(GLX_CONTEXT_DEBUG_BIT_ARB | GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB \
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@@ -320,6 +321,17 @@ __glXDisp_CreateContextAttribsARB(__GLXclientState * cl, GLbyte * pc)
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err = BadAlloc;
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}
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else {
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+ /* Only allow creating indirect GLX contexts if allowed by
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+ * server command line. Indirect GLX is of limited use (since
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+ * it's only GL 1.4), it's slower than direct contexts, and
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+ * it's a massive attack surface for buffer overflow type
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+ * errors.
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+ */
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+ if (!enableIndirectGLX) {
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+ client->errorValue = req->isDirect;
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+ return BadValue;
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+ }
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+
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ctx = glxScreen->createContext(glxScreen, config, shareCtx,
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req->numAttribs, (uint32_t *) attribs,
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&err);
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--
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2.19.0.rc1
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80
0001-present-fix-freed-pointer-access.patch
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80
0001-present-fix-freed-pointer-access.patch
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From 259f838af4aae2c240d0ea9c05073a86718990d7 Mon Sep 17 00:00:00 2001
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From: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
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Date: Mon, 27 Aug 2018 01:04:45 +0100
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Subject: [PATCH xserver] present: fix freed pointer access
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When a vblank has been marked as aborted, it's going to be free in the
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flip_notify function when stopped. We can't notify it after it's
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stopped because the pointer is invalid.
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Valgrind backtrace:
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==5331== Invalid read of size 8
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==5331== at 0x212B4D: present_vblank_notify (present_vblank.c:34)
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==5331== by 0x21439B: present_wnmd_flip_notify (present_wnmd.c:194)
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==5331== by 0x21439B: present_wnmd_event_notify (present_wnmd.c:228)
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==5331== by 0x156216: xwl_present_sync_callback (xwayland-present.c:282)
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==5331== by 0x6570FCD: ffi_call_unix64 (in /usr/lib/x86_64-linux-gnu/libffi.so.6.0.4)
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==5331== by 0x657093E: ffi_call (in /usr/lib/x86_64-linux-gnu/libffi.so.6.0.4)
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==5331== by 0x4DDB183: ??? (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0)
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==5331== by 0x4DD79D8: ??? (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0)
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==5331== by 0x4DD8EA3: wl_display_dispatch_queue_pending (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0)
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==5331== by 0x14BCCA: xwl_read_events (xwayland.c:814)
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==5331== by 0x2AC0D0: ospoll_wait (ospoll.c:651)
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==5331== by 0x2A5322: WaitForSomething (WaitFor.c:208)
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==5331== by 0x27574B: Dispatch (dispatch.c:421)
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==5331== Address 0x1b44dc98 is 40 bytes inside a block of size 184 free'd
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==5331== at 0x48369EB: free (vg_replace_malloc.c:530)
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==5331== by 0x213B0A: present_wnmd_free_idle_vblanks (present_wnmd.c:118)
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==5331== by 0x213B0A: present_wnmd_flips_stop (present_wnmd.c:161)
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==5331== by 0x2143EF: present_wnmd_flip_notify (present_wnmd.c:192)
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==5331== by 0x2143EF: present_wnmd_event_notify (present_wnmd.c:228)
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==5331== by 0x156216: xwl_present_sync_callback (xwayland-present.c:282)
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==5331== by 0x6570FCD: ffi_call_unix64 (in /usr/lib/x86_64-linux-gnu/libffi.so.6.0.4)
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==5331== by 0x657093E: ffi_call (in /usr/lib/x86_64-linux-gnu/libffi.so.6.0.4)
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==5331== by 0x4DDB183: ??? (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0)
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==5331== by 0x4DD79D8: ??? (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0)
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==5331== by 0x4DD8EA3: wl_display_dispatch_queue_pending (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0)
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==5331== by 0x14BCCA: xwl_read_events (xwayland.c:814)
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==5331== by 0x2AC0D0: ospoll_wait (ospoll.c:651)
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==5331== by 0x2A5322: WaitForSomething (WaitFor.c:208)
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==5331== Block was alloc'd at
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==5331== at 0x48377D5: calloc (vg_replace_malloc.c:711)
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==5331== by 0x212D9F: present_vblank_create (present_vblank.c:69)
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==5331== by 0x214014: present_wnmd_pixmap (present_wnmd.c:610)
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==5331== by 0x21576C: proc_present_pixmap (present_request.c:150)
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==5331== by 0x27599D: Dispatch (dispatch.c:479)
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==5331== by 0x279945: dix_main (main.c:276)
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==5331== by 0x633AB16: (below main) (libc-start.c:310)
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v2: Still notify aborted flips (Roman)
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Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
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Reviewed-by: Daniel Stone <daniels@collabora.com>
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Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107314
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Reviewed-by: Roman Gilg <subdiff@gmail.com>
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Tested-by: Roman Gilg <subdiff@gmail.com>
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---
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present/present_wnmd.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/present/present_wnmd.c b/present/present_wnmd.c
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index 035ae8ffe..8f3836440 100644
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--- a/present/present_wnmd.c
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+++ b/present/present_wnmd.c
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@@ -188,10 +188,11 @@ present_wnmd_flip_notify(present_vblank_ptr vblank, uint64_t ust, uint64_t crtc_
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window_priv->flip_active = vblank;
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window_priv->flip_pending = NULL;
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+ present_vblank_notify(vblank, PresentCompleteKindPixmap, PresentCompleteModeFlip, ust, crtc_msc);
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+
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if (vblank->abort_flip)
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present_wnmd_flips_stop(window);
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- present_vblank_notify(vblank, PresentCompleteKindPixmap, PresentCompleteModeFlip, ust, crtc_msc);
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present_wnmd_flip_try_ready(window);
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}
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--
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2.19.0.rc1
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From 90ac51f3e44d8d433741dc0f0495e79cc6e5fd51 Mon Sep 17 00:00:00 2001
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From: Olivier Fourdan <ofourdan@redhat.com>
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Date: Wed, 5 Sep 2018 09:34:12 +0200
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Subject: [PATCH xserver] xwayland: Remove xwl_present_window from privates on
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cleanup
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Xwayland's `xwl_destroy_window()` invokes `xwl_present_cleanup()`
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before the common `DestroyWindow()`.
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But then `DestroyWindow()` calls `present_destroy_window()` which will
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possibly end up in `xwl_present_abort_vblank()` which will try to access
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data that was previously freed by `xwl_present_cleanup()`:
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Invalid read of size 8
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at 0x434184: xwl_present_abort_vblank (xwayland-present.c:378)
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by 0x53785B: present_wnmd_abort_vblank (present_wnmd.c:651)
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by 0x53695A: present_free_window_vblank (present_screen.c:87)
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by 0x53695A: present_destroy_window (present_screen.c:152)
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by 0x42A90D: xwl_destroy_window (xwayland.c:653)
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by 0x584298: compDestroyWindow (compwindow.c:613)
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by 0x53CEE3: damageDestroyWindow (damage.c:1570)
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by 0x4F1BB8: DbeDestroyWindow (dbe.c:1326)
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by 0x46F7F6: FreeWindowResources (window.c:1031)
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by 0x472847: DeleteWindow (window.c:1099)
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by 0x46B54C: doFreeResource (resource.c:880)
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by 0x46C706: FreeClientResources (resource.c:1146)
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by 0x446ADE: CloseDownClient (dispatch.c:3473)
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Address 0x182abde0 is 80 bytes inside a block of size 112 free'd
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at 0x4C2FDAC: free (vg_replace_malloc.c:530)
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by 0x42A937: xwl_destroy_window (xwayland.c:647)
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by 0x584298: compDestroyWindow (compwindow.c:613)
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by 0x53CEE3: damageDestroyWindow (damage.c:1570)
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by 0x4F1BB8: DbeDestroyWindow (dbe.c:1326)
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by 0x46F7F6: FreeWindowResources (window.c:1031)
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by 0x472847: DeleteWindow (window.c:1099)
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by 0x46B54C: doFreeResource (resource.c:880)
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by 0x46C706: FreeClientResources (resource.c:1146)
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by 0x446ADE: CloseDownClient (dispatch.c:3473)
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by 0x446DA5: ProcKillClient (dispatch.c:3279)
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by 0x4476AF: Dispatch (dispatch.c:479)
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Block was alloc'd at
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at 0x4C30B06: calloc (vg_replace_malloc.c:711)
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by 0x433F46: xwl_present_window_get_priv (xwayland-present.c:54)
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by 0x434228: xwl_present_get_crtc (xwayland-present.c:302)
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by 0x539728: proc_present_query_capabilities (present_request.c:227)
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by 0x4476AF: Dispatch (dispatch.c:479)
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by 0x44B5B5: dix_main (main.c:276)
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by 0x75F611A: (below main) (libc-start.c:308)
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This is because `xwl_present_cleanup()` frees the memory but does not
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remove it from the window's privates, and `xwl_present_abort_vblank()`
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will still find it and hence try to access that freed memory...
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Remove `xwl_present_window` from window's privates on cleanup so that no
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other function can find and reuse that data once it's freed.
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1616269
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Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
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---
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hw/xwayland/xwayland-present.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/hw/xwayland/xwayland-present.c b/hw/xwayland/xwayland-present.c
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index 81e0eb9ce..316e04443 100644
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--- a/hw/xwayland/xwayland-present.c
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+++ b/hw/xwayland/xwayland-present.c
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@@ -147,6 +147,11 @@ xwl_present_cleanup(WindowPtr window)
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/* Clear timer */
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xwl_present_free_timer(xwl_present_window);
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+ /* Remove from privates so we don't try to access it later */
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+ dixSetPrivate(&window->devPrivates,
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+ &xwl_present_window_private_key,
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+ NULL);
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+
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free(xwl_present_window);
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}
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--
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2.19.0.rc1
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78
0001-xwayland-fix-access-to-invalid-pointer.patch
Normal file
78
0001-xwayland-fix-access-to-invalid-pointer.patch
Normal file
@ -0,0 +1,78 @@
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From b3f6dc6892ca554ecb57f4289182a3e29915a2c6 Mon Sep 17 00:00:00 2001
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From: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
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Date: Tue, 28 Aug 2018 21:30:05 +0100
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Subject: [PATCH xserver] xwayland: fix access to invalid pointer
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xwl_output->randr_crtc is used in the update_screen_size() function :
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==5331== Invalid read of size 4
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==5331== at 0x15263D: update_screen_size (xwayland-output.c:190)
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==5331== by 0x152C48: xwl_output_remove (xwayland-output.c:413)
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==5331== by 0x6570FCD: ffi_call_unix64 (in /usr/lib/x86_64-linux-gnu/libffi.so.6.0.4)
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==5331== by 0x657093E: ffi_call (in /usr/lib/x86_64-linux-gnu/libffi.so.6.0.4)
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==5331== by 0x4DDB183: ??? (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0)
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==5331== by 0x4DD79D8: ??? (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0)
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==5331== by 0x4DD8EA3: wl_display_dispatch_queue_pending (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0)
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==5331== by 0x14BCCA: xwl_read_events (xwayland.c:814)
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==5331== by 0x2AC0D0: ospoll_wait (ospoll.c:651)
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==5331== by 0x2A5322: WaitForSomething (WaitFor.c:208)
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==5331== by 0x27574B: Dispatch (dispatch.c:421)
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==5331== by 0x279945: dix_main (main.c:276)
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==5331== Address 0x1aacb5f4 is 36 bytes inside a block of size 154 free'd
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==5331== at 0x48369EB: free (vg_replace_malloc.c:530)
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==5331== by 0x1F8AE8: RROutputDestroyResource (rroutput.c:421)
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==5331== by 0x29A2AC: doFreeResource (resource.c:880)
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==5331== by 0x29AE5B: FreeResource (resource.c:910)
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==5331== by 0x152BE0: xwl_output_remove (xwayland-output.c:408)
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==5331== by 0x6570FCD: ffi_call_unix64 (in /usr/lib/x86_64-linux-gnu/libffi.so.6.0.4)
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==5331== by 0x657093E: ffi_call (in /usr/lib/x86_64-linux-gnu/libffi.so.6.0.4)
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==5331== by 0x4DDB183: ??? (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0)
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==5331== by 0x4DD79D8: ??? (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0)
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==5331== by 0x4DD8EA3: wl_display_dispatch_queue_pending (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0)
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==5331== by 0x14BCCA: xwl_read_events (xwayland.c:814)
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==5331== by 0x2AC0D0: ospoll_wait (ospoll.c:651)
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==5331== Block was alloc'd at
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==5331== at 0x48357BF: malloc (vg_replace_malloc.c:299)
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==5331== by 0x1F93E0: RROutputCreate (rroutput.c:83)
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==5331== by 0x152A75: xwl_output_create (xwayland-output.c:361)
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==5331== by 0x14BE59: registry_global (xwayland.c:764)
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==5331== by 0x6570FCD: ffi_call_unix64 (in /usr/lib/x86_64-linux-gnu/libffi.so.6.0.4)
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||||||
|
==5331== by 0x657093E: ffi_call (in /usr/lib/x86_64-linux-gnu/libffi.so.6.0.4)
|
||||||
|
==5331== by 0x4DDB183: ??? (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0)
|
||||||
|
==5331== by 0x4DD79D8: ??? (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0)
|
||||||
|
==5331== by 0x4DD8EA3: wl_display_dispatch_queue_pending (in /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0)
|
||||||
|
==5331== by 0x14BCCA: xwl_read_events (xwayland.c:814)
|
||||||
|
==5331== by 0x2AC0D0: ospoll_wait (ospoll.c:651)
|
||||||
|
==5331== by 0x2A5322: WaitForSomething (WaitFor.c:208)
|
||||||
|
|
||||||
|
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
|
||||||
|
Reviewed-by: Daniel Stone <daniels@collabora.com>
|
||||||
|
---
|
||||||
|
hw/xwayland/xwayland-output.c | 5 +++--
|
||||||
|
1 file changed, 3 insertions(+), 2 deletions(-)
|
||||||
|
|
||||||
|
diff --git a/hw/xwayland/xwayland-output.c b/hw/xwayland/xwayland-output.c
|
||||||
|
index 0d2ec7890..cc68f0340 100644
|
||||||
|
--- a/hw/xwayland/xwayland-output.c
|
||||||
|
+++ b/hw/xwayland/xwayland-output.c
|
||||||
|
@@ -404,14 +404,15 @@ xwl_output_remove(struct xwl_output *xwl_output)
|
||||||
|
int width = 0, height = 0;
|
||||||
|
Bool need_rotate = (xwl_output->xdg_output == NULL);
|
||||||
|
|
||||||
|
- RRCrtcDestroy(xwl_output->randr_crtc);
|
||||||
|
- RROutputDestroy(xwl_output->randr_output);
|
||||||
|
xorg_list_del(&xwl_output->link);
|
||||||
|
|
||||||
|
xorg_list_for_each_entry(it, &xwl_screen->output_list, link)
|
||||||
|
output_get_new_size(it, need_rotate, &height, &width);
|
||||||
|
update_screen_size(xwl_output, width, height);
|
||||||
|
|
||||||
|
+ RRCrtcDestroy(xwl_output->randr_crtc);
|
||||||
|
+ RROutputDestroy(xwl_output->randr_output);
|
||||||
|
+
|
||||||
|
xwl_output_destroy(xwl_output);
|
||||||
|
}
|
||||||
|
|
||||||
|
--
|
||||||
|
2.19.0.rc1
|
||||||
|
|
||||||
@ -46,7 +46,7 @@
|
|||||||
Summary: X.Org X11 X server
|
Summary: X.Org X11 X server
|
||||||
Name: xorg-x11-server
|
Name: xorg-x11-server
|
||||||
Version: 1.20.1
|
Version: 1.20.1
|
||||||
Release: 1%{?gitdate:.%{gitdate}}%{dist}
|
Release: 2%{?gitdate:.%{gitdate}}%{dist}
|
||||||
URL: http://www.x.org
|
URL: http://www.x.org
|
||||||
License: MIT
|
License: MIT
|
||||||
Group: User Interface/X
|
Group: User Interface/X
|
||||||
@ -94,6 +94,12 @@ Patch5: 0001-autobind-GPUs-to-the-screen.patch
|
|||||||
# because the display-managers are not ready yet, do not upstream
|
# because the display-managers are not ready yet, do not upstream
|
||||||
Patch6: 0001-Fedora-hack-Make-the-suid-root-wrapper-always-start-.patch
|
Patch6: 0001-Fedora-hack-Make-the-suid-root-wrapper-always-start-.patch
|
||||||
|
|
||||||
|
# Submitted upstream
|
||||||
|
Patch7: 0001-xwayland-Remove-xwl_present_window-from-privates-on-.patch
|
||||||
|
Patch8: 0001-xwayland-fix-access-to-invalid-pointer.patch
|
||||||
|
Patch9: 0001-present-fix-freed-pointer-access.patch
|
||||||
|
Patch10: 0001-glx-check-for-indirect-context-in-CreateContextAttri.patch
|
||||||
|
|
||||||
BuildRequires: systemtap-sdt-devel
|
BuildRequires: systemtap-sdt-devel
|
||||||
BuildRequires: git
|
BuildRequires: git
|
||||||
BuildRequires: automake autoconf libtool pkgconfig
|
BuildRequires: automake autoconf libtool pkgconfig
|
||||||
@ -523,6 +529,9 @@ find %{inst_srcdir}/hw/xfree86 -name \*.c -delete
|
|||||||
|
|
||||||
|
|
||||||
%changelog
|
%changelog
|
||||||
|
* Mon Sep 10 2018 Olivier Fourdan <ofourdan@redhat.com> - 1.20.1-2
|
||||||
|
- Include patches from upstream to fix Xwayland crashes
|
||||||
|
|
||||||
* Thu Aug 09 2018 Adam Jackson <ajax@redhat.com> - 1.20.1-1
|
* Thu Aug 09 2018 Adam Jackson <ajax@redhat.com> - 1.20.1-1
|
||||||
- xserver 1.20.1
|
- xserver 1.20.1
|
||||||
|
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user