Sign Up
Log In
Log In
or
Sign Up
Places
All Projects
Status Monitor
Collapse sidebar
SUSE:SLE-15-SP4:Update
xorg-x11-server.31075
U_xfree86-Change-displays-array-to-pointers-arr...
Overview
Repositories
Revisions
Requests
Users
Attributes
Meta
File U_xfree86-Change-displays-array-to-pointers-array-to-f.patch of Package xorg-x11-server.31075
From f8a6be04d0c7e6a99824ff888ad6c010960c5c21 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C5=81ukasz=20Spintzyk?= <lukasz.spintzyk@synaptics.com> Date: Tue, 8 Jun 2021 20:02:21 +0200 Subject: [PATCH] xfree86: Change displays array to pointers array to fix invalid pointer issues after table reallocation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit There are rare cases when xf86SetDepthBpp is resizing displays array in confScreen. As that array is shared between set of ScrnInfoRec's then realloc might invalidate chached DispPtr display values in otheres ScrnInfoRec objects. If we will change displays array as an array of pointers to DispRec then cached DispRec pointers in ScrnInfoRec won't be invalid after reallocation of displays array. Signed-off-by: Łukasz Spintzyk <lukasz.spintzyk@synaptics.com> --- hw/xfree86/common/xf86Config.c | 10 +++++---- hw/xfree86/common/xf86Helper.c | 37 +++++++++++++++++----------------- hw/xfree86/common/xf86str.h | 2 +- 3 files changed, 26 insertions(+), 23 deletions(-) diff --git a/hw/xfree86/common/xf86Config.c b/hw/xfree86/common/xf86Config.c index 608f093bb..73ab88ba5 100644 --- a/hw/xfree86/common/xf86Config.c +++ b/hw/xfree86/common/xf86Config.c @@ -1794,7 +1794,7 @@ configScreen(confScreenPtr screenp, XF86ConfScreenPtr conf_screen, int scrnum, count++; dispptr = (XF86ConfDisplayPtr) dispptr->list.next; } - screenp->displays = xnfallocarray(count, sizeof(DispRec)); + screenp->displays = xnfallocarray(count, sizeof(DispPtr)); screenp->numdisplays = count; /* Fill in the default Virtual size, if any */ @@ -1802,8 +1802,9 @@ configScreen(confScreenPtr screenp, XF86ConfScreenPtr conf_screen, int scrnum, for (count = 0, dispptr = conf_screen->scrn_display_lst; dispptr; dispptr = (XF86ConfDisplayPtr) dispptr->list.next, count++) { - screenp->displays[count].virtualX = conf_screen->scrn_virtualX; - screenp->displays[count].virtualY = conf_screen->scrn_virtualY; + screenp->displays[count] = xnfcalloc(1, sizeof(DispRec)); + screenp->displays[count]->virtualX = conf_screen->scrn_virtualX; + screenp->displays[count]->virtualY = conf_screen->scrn_virtualY; } } @@ -1811,7 +1812,7 @@ configScreen(confScreenPtr screenp, XF86ConfScreenPtr conf_screen, int scrnum, count = 0; dispptr = conf_screen->scrn_display_lst; while (dispptr) { - configDisplay(&(screenp->displays[count]), dispptr); + configDisplay(screenp->displays[count], dispptr); count++; dispptr = (XF86ConfDisplayPtr) dispptr->list.next; } @@ -1819,6 +1820,7 @@ configScreen(confScreenPtr screenp, XF86ConfScreenPtr conf_screen, int scrnum, /* * figure out how many videoadaptor references there are and fill them in */ + count = 0; conf_adaptor = conf_screen->scrn_adaptor_lst; while (conf_adaptor) { count++; diff --git a/hw/xfree86/common/xf86Helper.c b/hw/xfree86/common/xf86Helper.c index 16ab309e2..0389945a7 100644 --- a/hw/xfree86/common/xf86Helper.c +++ b/hw/xfree86/common/xf86Helper.c @@ -526,8 +526,8 @@ xf86SetDepthBpp(ScrnInfoPtr scrp, int depth, int dummy, int fbbpp, * Find the Display subsection matching the depth/fbbpp and initialise * scrp->display with it. */ - for (i = 0, disp = scrp->confScreen->displays; - i < scrp->confScreen->numdisplays; i++, disp++) { + for (i = 0; i < scrp->confScreen->numdisplays; i++) { + disp = scrp->confScreen->displays[i]; if ((disp->depth == scrp->depth && disp->fbbpp == scrp->bitsPerPixel) || (disp->depth == scrp->depth && disp->fbbpp <= 0) || (disp->fbbpp == scrp->bitsPerPixel && disp->depth <= 0)) { @@ -541,8 +541,8 @@ xf86SetDepthBpp(ScrnInfoPtr scrp, int depth, int dummy, int fbbpp, * depth or fbbpp specified. */ if (i == scrp->confScreen->numdisplays) { - for (i = 0, disp = scrp->confScreen->displays; - i < scrp->confScreen->numdisplays; i++, disp++) { + for (i = 0; i < scrp->confScreen->numdisplays; i++) { + disp = scrp->confScreen->displays[i]; if (disp->depth <= 0 && disp->fbbpp <= 0) { scrp->display = disp; break; @@ -557,24 +557,25 @@ xf86SetDepthBpp(ScrnInfoPtr scrp, int depth, int dummy, int fbbpp, scrp->confScreen->numdisplays++; scrp->confScreen->displays = xnfreallocarray(scrp->confScreen->displays, - scrp->confScreen->numdisplays, sizeof(DispRec)); + scrp->confScreen->numdisplays, sizeof(DispPtr)); xf86DrvMsg(scrp->scrnIndex, X_INFO, "Creating default Display subsection in Screen section\n" "\t\"%s\" for depth/fbbpp %d/%d\n", scrp->confScreen->id, scrp->depth, scrp->bitsPerPixel); - memset(&scrp->confScreen->displays[i], 0, sizeof(DispRec)); - scrp->confScreen->displays[i].blackColour.red = -1; - scrp->confScreen->displays[i].blackColour.green = -1; - scrp->confScreen->displays[i].blackColour.blue = -1; - scrp->confScreen->displays[i].whiteColour.red = -1; - scrp->confScreen->displays[i].whiteColour.green = -1; - scrp->confScreen->displays[i].whiteColour.blue = -1; - scrp->confScreen->displays[i].defaultVisual = -1; - scrp->confScreen->displays[i].modes = xnfalloc(sizeof(char *)); - scrp->confScreen->displays[i].modes[0] = NULL; - scrp->confScreen->displays[i].depth = depth; - scrp->confScreen->displays[i].fbbpp = fbbpp; - scrp->display = &scrp->confScreen->displays[i]; + scrp->confScreen->displays[i] = xnfcalloc(1, sizeof(DispRec)); + memset(scrp->confScreen->displays[i], 0, sizeof(DispRec)); + scrp->confScreen->displays[i]->blackColour.red = -1; + scrp->confScreen->displays[i]->blackColour.green = -1; + scrp->confScreen->displays[i]->blackColour.blue = -1; + scrp->confScreen->displays[i]->whiteColour.red = -1; + scrp->confScreen->displays[i]->whiteColour.green = -1; + scrp->confScreen->displays[i]->whiteColour.blue = -1; + scrp->confScreen->displays[i]->defaultVisual = -1; + scrp->confScreen->displays[i]->modes = xnfalloc(sizeof(char *)); + scrp->confScreen->displays[i]->modes[0] = NULL; + scrp->confScreen->displays[i]->depth = depth; + scrp->confScreen->displays[i]->fbbpp = fbbpp; + scrp->display = scrp->confScreen->displays[i]; } /* diff --git a/hw/xfree86/common/xf86str.h b/hw/xfree86/common/xf86str.h index 8f8685ef2..9072932cb 100644 --- a/hw/xfree86/common/xf86str.h +++ b/hw/xfree86/common/xf86str.h @@ -351,7 +351,7 @@ typedef struct _confscreenrec { MonPtr monitor; GDevPtr device; int numdisplays; - DispPtr displays; + DispPtr *displays; int numxvadaptors; confXvAdaptorPtr xvadaptors; void *options; -- 2.34.1
Locations
Projects
Search
Status Monitor
Help
OpenBuildService.org
Documentation
API Documentation
Code of Conduct
Contact
Support
@OBShq
Terms
openSUSE Build Service is sponsored by
The Open Build Service is an
openSUSE project
.
Sign Up
Log In
Places
Places
All Projects
Status Monitor
