An xorg.conf InputDevice section that does not have Option Type set is
invalid. Skip the type assignment and return, triggering an error about an
invalid type lateron.
Fixes crash triggered as of xf86-input-wacom-0.17.0-8-g0debde6 by having an
InputDevice section like this:
Section "InputDevice"
Identifier "--device--"
Driver "wacom"
Option "CorePointer" "on"
EndSection
This would lead to the device being assigned a type and assumed to be for
hotplugging. Later, when the device attributes are duplicated during
QueueHotplug, asprintf() tries to duplicate attr->product, which is always
NULL for xorg.conf devices.
Signed-off-by: Peter Hutterer <peter.hutte...@who-t.net>
---
Full config for the lazy :)
Section "ServerLayout"
Identifier "Dummy layout"
Option "AutoAddDevices" "off"
Screen 0 "dummy screen" 0 0
InputDevice "--device--"
EndSection
Section "ServerFlags"
Option "Log" "flush"
EndSection
Section "Device"
Identifier "dummy"
Driver "dummy"
EndSection
Section "Screen"
Identifier "dummy screen"
Device "dummy"
EndSection
Section "InputDevice"
Identifier "--device--"
Driver "wacom"
Option "CorePointer" "on"
EndSection
Running 9f896f4800593c7fa232e40fd934b7f51d0dde6d (0.17.99.1) with that config
file below crashes the server immediately. git bisect pointed to
xf86-input-wacom-0.17.0-8-g0debde6, but that seems to just trigger the bug,
it's not the direct cause of it.
src/wcmValidateDevice.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/src/wcmValidateDevice.c b/src/wcmValidateDevice.c
index 658092b..bc5ad44 100644
--- a/src/wcmValidateDevice.c
+++ b/src/wcmValidateDevice.c
@@ -578,6 +578,9 @@ int wcmNeedAutoHotplug(InputInfoPtr pInfo, const char
**type)
if (*type) /* type specified, don't hotplug */
return 0;
+ if (!source) /* xorg.conf device, don't auto-pick type */
+ return 0;
+
if (source && strcmp(source, "server/hal") && strcmp(source,
"server/udev"))
return 0;
--
1.7.11.7
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