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Coverity #323, #445, #446, #447: Fix potential NULL dereferences.

This commit is contained in:
Daniel Stone 2006-04-09 17:15:51 +00:00
parent 2387bfa5ff
commit d5bc41b882
2 changed files with 23 additions and 0 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2006-04-09 Daniel Stone <daniel@freedesktop.org>
* Xi/exevents.c:
Coverity #323, #445, #446, #447: Fix potential NULL dereferences.
2006-04-07 Aaron Plattner <aplattner@nvidia.com>
* hw/xfree86/common/xf86Module.h:

18
Xi/exevents.c
View File

@ -175,6 +175,9 @@ ProcessOtherEvent(xEventPtr xE, register DeviceIntPtr other, int count)
}
if (xE->u.u.type == DeviceKeyPress) {
if (!k)
return;
modifiers = k->modifierMap[key];
kptr = &k->down[key >> 3];
if (*kptr & bit) { /* allow ddx to generate multiple downs */
@ -204,6 +207,9 @@ ProcessOtherEvent(xEventPtr xE, register DeviceIntPtr other, int count)
return;
}
} else if (xE->u.u.type == DeviceKeyRelease) {
if (!k)
return;
kptr = &k->down[key >> 3];
if (!(*kptr & bit)) /* guard against duplicates */
return;
@ -226,6 +232,9 @@ ProcessOtherEvent(xEventPtr xE, register DeviceIntPtr other, int count)
if (other->fromPassiveGrab && (key == other->activatingKey))
deactivateDeviceGrab = TRUE;
} else if (xE->u.u.type == DeviceButtonPress) {
if (!b)
return;
kptr = &b->down[key >> 3];
*kptr |= bit;
if (other->valuator)
@ -243,6 +252,9 @@ ProcessOtherEvent(xEventPtr xE, register DeviceIntPtr other, int count)
return;
} else if (xE->u.u.type == DeviceButtonRelease) {
if (!b)
return;
kptr = &b->down[key >> 3];
*kptr &= ~bit;
if (other->valuator)
@ -1073,6 +1085,9 @@ MaybeSendDeviceMotionNotifyHint(deviceKeyButtonPointer * pEvents, Mask mask)
DeviceIntPtr dev;
dev = LookupDeviceIntRec(pEvents->deviceid & DEVICE_BITS);
if (!dev)
return 0;
if (pEvents->type == DeviceMotionNotify) {
if (mask & DevicePointerMotionHintMask) {
if (WID(dev->valuator->motionHintWindow) == pEvents->event) {
@ -1094,6 +1109,9 @@ CheckDeviceGrabAndHintWindow(WindowPtr pWin, int type,
DeviceIntPtr dev;
dev = LookupDeviceIntRec(xE->deviceid & DEVICE_BITS);
if (!dev)
return;
if (type == DeviceMotionNotify)
dev->valuator->motionHintWindow = pWin;
else if ((type == DeviceButtonPress) && (!grab) &&