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From 11eea736f44a236dde884b52ad51cb5d1271b7a5 Mon Sep 17 00:00:00 2001
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From: Peter Hutterer <peter.hutterer@who-t.net>
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Date: Wed, 13 Jan 2010 15:03:45 +1000
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Subject: [PATCH] Xi: reset the sli pointers after copying device classes. (#25640)
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If the indicator flags have the XkbSLI_IsDefault bit set, the indicator map
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and names aren't their own bit of memory but rather point into the
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device->key->xkbInfo->desc structure. XkbCopySrvLedInfo knows about this and
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leaves the pointers alone.
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When copying the classes from the slave to the master, these pointers are
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copied and still point to the dev->key class of the slave device. If the
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slave device is removed, the memory becomes invalid and a call to modify
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this data (e.g. XkbSetIndicators) may cause a deadlock.
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The copying of dev->key relies on dev->kbdfeed to be already set up. Hence
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the pointers need to be reset once _both_ kbdfeed and key have been copied
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into the master device.
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X.Org Bug 25640 <http://bugs.freedesktop.org/show_bug.cgi?id=25640>
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Fedora Bug 540584 <https://bugzilla.redhat.com/show_bug.cgi?id=540584>
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---
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Xi/exevents.c | 20 ++++++++++++++++++++
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1 files changed, 20 insertions(+), 0 deletions(-)
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diff --git a/Xi/exevents.c b/Xi/exevents.c
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index cb2452b..ee32ba8 100644
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--- a/Xi/exevents.c
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+++ b/Xi/exevents.c
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@@ -444,6 +444,26 @@ DeepCopyKeyboardClasses(DeviceIntPtr from, DeviceIntPtr to)
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to->key = NULL;
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}
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+ /* If a SrvLedInfoPtr's flags are XkbSLI_IsDefault, the names and maps
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+ * pointer point into the xkbInfo->desc struct. XkbCopySrvLedInfo
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+ * didn't update the pointers so we need to do it manually here.
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+ */
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+ if (to->kbdfeed)
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+ {
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+ KbdFeedbackPtr k;
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+
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+ for (k = to->kbdfeed; k; k = k->next)
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+ {
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+ if (!k->xkb_sli)
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+ continue;
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+ if (k->xkb_sli->flags & XkbSLI_IsDefault)
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+ {
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+ k->xkb_sli->names = to->key->xkbInfo->desc->names->indicators;
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+ k->xkb_sli->maps = to->key->xkbInfo->desc->indicators->maps;
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+ }
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+ }
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+ }
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+
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/* We can't just copy over the focus class. When an app sets the focus,
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* it'll do so on the master device. Copying the SDs focus means losing
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* the focus.
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--
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1.6.6
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