diff options
Diffstat (limited to 'meta/recipes-graphics/xorg-xserver/xserver-xorg/0001-xkb-Check-strings-length-against-request-size.patch')
-rw-r--r-- | meta/recipes-graphics/xorg-xserver/xserver-xorg/0001-xkb-Check-strings-length-against-request-size.patch | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/meta/recipes-graphics/xorg-xserver/xserver-xorg/0001-xkb-Check-strings-length-against-request-size.patch b/meta/recipes-graphics/xorg-xserver/xserver-xorg/0001-xkb-Check-strings-length-against-request-size.patch new file mode 100644 index 0000000000..b0e2bcad43 --- /dev/null +++ b/meta/recipes-graphics/xorg-xserver/xserver-xorg/0001-xkb-Check-strings-length-against-request-size.patch @@ -0,0 +1,145 @@ +From 20079c36cf7d377938ca5478447d8b9045cb7d43 Mon Sep 17 00:00:00 2001 +From: Olivier Fourdan <ofourdan@redhat.com> +Date: Fri, 16 Jan 2015 08:44:45 +0100 +Subject: [PATCH] xkb: Check strings length against request size + +Ensure that the given strings length in an XkbSetGeometry request remain +within the limits of the size of the request. + +Signed-off-by: Olivier Fourdan <ofourdan@redhat.com> +Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net> +Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> + +Upstream-Status: backport + +Signed-off-by: Li Zhou <li.zhou@windriver.com> +--- + xkb/xkb.c | 65 +++++++++++++++++++++++++++++++++++++------------------------ + 1 file changed, 40 insertions(+), 25 deletions(-) + +diff --git a/xkb/xkb.c b/xkb/xkb.c +index b9a3ac4..f3988f9 100644 +--- a/xkb/xkb.c ++++ b/xkb/xkb.c +@@ -4957,25 +4957,29 @@ ProcXkbGetGeometry(ClientPtr client) + + /***====================================================================***/ + +-static char * +-_GetCountedString(char **wire_inout, Bool swap) ++static Status ++_GetCountedString(char **wire_inout, ClientPtr client, char **str) + { +- char *wire, *str; ++ char *wire, *next; + CARD16 len; + + wire = *wire_inout; + len = *(CARD16 *) wire; +- if (swap) { ++ if (client->swapped) { + swaps(&len); + } +- str = malloc(len + 1); +- if (str) { +- memcpy(str, &wire[2], len); +- str[len] = '\0'; +- } +- wire += XkbPaddedSize(len + 2); +- *wire_inout = wire; +- return str; ++ next = wire + XkbPaddedSize(len + 2); ++ /* Check we're still within the size of the request */ ++ if (client->req_len < ++ bytes_to_int32(next - (char *) client->requestBuffer)) ++ return BadValue; ++ *str = malloc(len + 1); ++ if (!*str) ++ return BadAlloc; ++ memcpy(*str, &wire[2], len); ++ *(*str + len) = '\0'; ++ *wire_inout = next; ++ return Success; + } + + static Status +@@ -4987,6 +4991,7 @@ _CheckSetDoodad(char **wire_inout, + xkbAnyDoodadWireDesc any; + xkbTextDoodadWireDesc text; + XkbDoodadPtr doodad; ++ Status status; + + dWire = (xkbDoodadWireDesc *) (*wire_inout); + any = dWire->any; +@@ -5036,8 +5041,14 @@ _CheckSetDoodad(char **wire_inout, + doodad->text.width = text.width; + doodad->text.height = text.height; + doodad->text.color_ndx = dWire->text.colorNdx; +- doodad->text.text = _GetCountedString(&wire, client->swapped); +- doodad->text.font = _GetCountedString(&wire, client->swapped); ++ status = _GetCountedString(&wire, client, &doodad->text.text); ++ if (status != Success) ++ return status; ++ status = _GetCountedString(&wire, client, &doodad->text.font); ++ if (status != Success) { ++ free (doodad->text.text); ++ return status; ++ } + break; + case XkbIndicatorDoodad: + if (dWire->indicator.onColorNdx >= geom->num_colors) { +@@ -5072,7 +5083,9 @@ _CheckSetDoodad(char **wire_inout, + } + doodad->logo.color_ndx = dWire->logo.colorNdx; + doodad->logo.shape_ndx = dWire->logo.shapeNdx; +- doodad->logo.logo_name = _GetCountedString(&wire, client->swapped); ++ status = _GetCountedString(&wire, client, &doodad->logo.logo_name); ++ if (status != Success) ++ return status; + break; + default: + client->errorValue = _XkbErrCode2(0x4F, dWire->any.type); +@@ -5304,18 +5317,20 @@ _CheckSetGeom(XkbGeometryPtr geom, xkbSetGeometryReq * req, ClientPtr client) + char *wire; + + wire = (char *) &req[1]; +- geom->label_font = _GetCountedString(&wire, client->swapped); ++ status = _GetCountedString(&wire, client, &geom->label_font); ++ if (status != Success) ++ return status; + + for (i = 0; i < req->nProperties; i++) { + char *name, *val; + +- name = _GetCountedString(&wire, client->swapped); +- if (!name) +- return BadAlloc; +- val = _GetCountedString(&wire, client->swapped); +- if (!val) { ++ status = _GetCountedString(&wire, client, &name); ++ if (status != Success) ++ return status; ++ status = _GetCountedString(&wire, client, &val); ++ if (status != Success) { + free(name); +- return BadAlloc; ++ return status; + } + if (XkbAddGeomProperty(geom, name, val) == NULL) { + free(name); +@@ -5349,9 +5364,9 @@ _CheckSetGeom(XkbGeometryPtr geom, xkbSetGeometryReq * req, ClientPtr client) + for (i = 0; i < req->nColors; i++) { + char *name; + +- name = _GetCountedString(&wire, client->swapped); +- if (!name) +- return BadAlloc; ++ status = _GetCountedString(&wire, client, &name); ++ if (status != Success) ++ return status; + if (!XkbAddGeomColor(geom, name, geom->num_colors)) { + free(name); + return BadAlloc; +-- +1.7.9.5 + |