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openSUSE:Leap:15.5:Update
xorg-x11-server.24939
u_xkb-CVE-2020-14345.patch
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File u_xkb-CVE-2020-14345.patch of Package xorg-x11-server.24939
diff --git a/xkb/xkb.c b/xkb/xkb.c index d93078a6e..8e016cd74 100644 --- a/xkb/xkb.c +++ b/xkb/xkb.c @@ -152,6 +152,19 @@ static RESTYPE RT_XKBCLIENT; #define CHK_REQ_KEY_RANGE(err,first,num,r) \ CHK_REQ_KEY_RANGE2(err,first,num,r,client->errorValue,BadValue) +static Bool +_XkbCheckRequestBounds(ClientPtr client, void *stuff, void *from, void *to) { + char *cstuff = (char *)stuff; + char *cfrom = (char *)from; + char *cto = (char *)to; + + return cfrom < cto && + cfrom >= cstuff && + cfrom < cstuff + ((size_t)client->req_len << 2) && + cto >= cstuff && + cto <= cstuff + ((size_t)client->req_len << 2); +} + /***====================================================================***/ int @@ -4048,6 +4061,8 @@ _XkbSetNamesCheck(ClientPtr client, DeviceIntPtr dev, client->errorValue = _XkbErrCode2(0x04, stuff->firstType); return BadAccess; } + if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + stuff->nTypes)) + return BadLength; old = tmp; tmp = _XkbCheckAtoms(tmp, stuff->nTypes, client->swapped, &bad); if (!tmp) { @@ -4077,6 +4092,8 @@ _XkbSetNamesCheck(ClientPtr client, DeviceIntPtr dev, } width = (CARD8 *) tmp; tmp = (CARD32 *) (((char *) tmp) + XkbPaddedSize(stuff->nKTLevels)); + if (!_XkbCheckRequestBounds(client, stuff, width, tmp)) + return BadLength; type = &xkb->map->types[stuff->firstKTLevel]; for (i = 0; i < stuff->nKTLevels; i++, type++) { if (width[i] == 0) @@ -4086,6 +4103,8 @@ _XkbSetNamesCheck(ClientPtr client, DeviceIntPtr dev, type->num_levels, width[i]); return BadMatch; } + if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + width[i])) + return BadLength; tmp = _XkbCheckAtoms(tmp, width[i], client->swapped, &bad); if (!tmp) { client->errorValue = bad; @@ -4098,6 +4117,9 @@ _XkbSetNamesCheck(ClientPtr client, DeviceIntPtr dev, client->errorValue = 0x08; return BadMatch; } + if (!_XkbCheckRequestBounds(client, stuff, tmp, + tmp + Ones(stuff->indicators))) + return BadLength; tmp = _XkbCheckMaskedAtoms(tmp, XkbNumIndicators, stuff->indicators, client->swapped, &bad); if (!tmp) { @@ -4110,6 +4132,9 @@ _XkbSetNamesCheck(ClientPtr client, DeviceIntPtr dev, client->errorValue = 0x09; return BadMatch; } + if (!_XkbCheckRequestBounds(client, stuff, tmp, + tmp + Ones(stuff->virtualMods))) + return BadLength; tmp = _XkbCheckMaskedAtoms(tmp, XkbNumVirtualMods, (CARD32) stuff->virtualMods, client->swapped, &bad); @@ -4123,6 +4148,9 @@ _XkbSetNamesCheck(ClientPtr client, DeviceIntPtr dev, client->errorValue = 0x0a; return BadMatch; } + if (!_XkbCheckRequestBounds(client, stuff, tmp, + tmp + Ones(stuff->groupNames))) + return BadLength; tmp = _XkbCheckMaskedAtoms(tmp, XkbNumKbdGroups, (CARD32) stuff->groupNames, client->swapped, &bad); @@ -4144,9 +4172,14 @@ _XkbSetNamesCheck(ClientPtr client, DeviceIntPtr dev, stuff->nKeys); return BadValue; } + if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + stuff->nKeys)) + return BadLength; tmp += stuff->nKeys; } if ((stuff->which & XkbKeyAliasesMask) && (stuff->nKeyAliases > 0)) { + if (!_XkbCheckRequestBounds(client, stuff, tmp, + tmp + (stuff->nKeyAliases * 2))) + return BadLength; tmp += stuff->nKeyAliases * 2; } if (stuff->which & XkbRGNamesMask) { @@ -4154,6 +4187,9 @@ _XkbSetNamesCheck(ClientPtr client, DeviceIntPtr dev, client->errorValue = _XkbErrCode2(0x0d, stuff->nRadioGroups); return BadValue; } + if (!_XkbCheckRequestBounds(client, stuff, tmp, + tmp + stuff->nRadioGroups)) + return BadLength; tmp = _XkbCheckAtoms(tmp, stuff->nRadioGroups, client->swapped, &bad); if (!tmp) { client->errorValue = bad; @@ -4347,6 +4383,8 @@ ProcXkbSetNames(ClientPtr client) /* check device-independent stuff */ tmp = (CARD32 *) &stuff[1]; + if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + 1)) + return BadLength; if (stuff->which & XkbKeycodesNameMask) { tmp = _XkbCheckAtoms(tmp, 1, client->swapped, &bad); if (!tmp) { @@ -4354,6 +4392,8 @@ ProcXkbSetNames(ClientPtr client) return BadAtom; } } + if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + 1)) + return BadLength; if (stuff->which & XkbGeometryNameMask) { tmp = _XkbCheckAtoms(tmp, 1, client->swapped, &bad); if (!tmp) { @@ -4361,6 +4401,8 @@ ProcXkbSetNames(ClientPtr client) return BadAtom; } } + if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + 1)) + return BadLength; if (stuff->which & XkbSymbolsNameMask) { tmp = _XkbCheckAtoms(tmp, 1, client->swapped, &bad); if (!tmp) { @@ -4368,6 +4410,8 @@ ProcXkbSetNames(ClientPtr client) return BadAtom; } } + if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + 1)) + return BadLength; if (stuff->which & XkbPhysSymbolsNameMask) { tmp = _XkbCheckAtoms(tmp, 1, client->swapped, &bad); if (!tmp) { @@ -4375,6 +4419,8 @@ ProcXkbSetNames(ClientPtr client) return BadAtom; } } + if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + 1)) + return BadLength; if (stuff->which & XkbTypesNameMask) { tmp = _XkbCheckAtoms(tmp, 1, client->swapped, &bad); if (!tmp) { @@ -4382,6 +4428,8 @@ ProcXkbSetNames(ClientPtr client) return BadAtom; } } + if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + 1)) + return BadLength; if (stuff->which & XkbCompatNameMask) { tmp = _XkbCheckAtoms(tmp, 1, client->swapped, &bad); if (!tmp) {
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