debian/changelog
| 8 ++
debian/patches/516-dix-dont-emulate-scroll-events-for-non-existing-axes.patch
| 39 ++++++++++
debian/patches/series
| 1
3 files changed, 48 insertions(+)
New commits:
commit a8af882fba4b800552b94ec18aec7f6b66f85f60
Author: Timo Aaltonen <tjaal...@ubuntu.com>
Date: Thu Jul 5 22:57:01 2012 +0300
Add 516-dix-dont-emulate-scroll-events-for-non-existing-axes.patch
from upstream 1.12.2. Fixes the server from entering in an infinite
loop in certain situations. (LP: #921236)
diff --git a/debian/changelog b/debian/changelog
index e052fc1..e9c3858 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,11 @@
+xorg-server (2:1.11.4-0ubuntu10.4) UNRELEASED; urgency=low
+
+ * Add 516-dix-dont-emulate-scroll-events-for-non-existing-axes.patch
+ from upstream 1.12.2. Fixes the server from entering in an infinite
+ loop in certain situations. (LP: #921236)
+
+ -- Timo Aaltonen <tjaal...@ubuntu.com> Thu, 05 Jul 2012 22:50:45 +0300
+
xorg-server (2:1.11.4-0ubuntu10.3) precise-proposed; urgency=low
[ Maarten Lankhorst ]
diff --git
a/debian/patches/516-dix-dont-emulate-scroll-events-for-non-existing-axes.patch
b/debian/patches/516-dix-dont-emulate-scroll-events-for-non-existing-axes.patch
new file mode 100644
index 0000000..7d022e1
--- /dev/null
+++
b/debian/patches/516-dix-dont-emulate-scroll-events-for-non-existing-axes.patch
@@ -0,0 +1,39 @@
+commit b53cdf4c53f0787ed41281278877e0405fcb2674
+Author: Peter Hutterer <peter.hutte...@who-t.net>
+Date: Fri Apr 27 16:31:17 2012 +1000
+
+ dix: don't emulate scroll events for non-existing axes (#47281)
+
+ Test case:
+ - create a device with REL_HWHEEL and ABS_X and ABS_Y. evdev 2.7.0 will set
+ that up as device with 1 relative axis
+ - move pointer to VGA1
+ - xrandr --output VGA1 --off
+
+ Warps the pointer to the new spot and calls GPE with the x/y mask bits set.
+ When running through the loop to check for scroll event, this overruns the
+ axes and may try to emulate scroll events based on random garbage in the
+ memory. If that memory contained non-zero for the scroll type but near-zero
+ for the increment field, the server would hang in an infinite loop.
+
+ This was the trigger for this suggested, never-merged, patch here:
+ http://patchwork.freedesktop.org/patch/9543/
+
+ X.Org Bug 47281 <http://bugs.freedesktop.org/show_bug.cgi?id=47281>
+
+ Signed-off-by: Peter Hutterer <peter.hutte...@who-t.net>
+ Reviewed-by: Chase Douglas <chase.doug...@canonical.com>
+ (cherry picked from commit af88b43f9e604157b74270d609c08bdfa256a792)
+
+--- a/dix/getevents.c
++++ b/dix/getevents.c
+@@ -1593,6 +1593,9 @@
+ /* Now turn the smooth-scrolling axes back into emulated button presses
+ * for legacy clients, based on the integer delta between before and now
*/
+ for (i = 0; i < valuator_mask_size(&mask); i++) {
++ if (i >= pDev->valuator->numAxes)
++ break;
++
+ if (!valuator_mask_isset(&mask, i))
+ continue;
+
diff --git a/debian/patches/series b/debian/patches/series
index 775d106..c6e059f 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -45,3 +45,4 @@
513-dix-disable-non-sprite-owners-first-when-disabling-p.patch
514-Xi-drop-forced-unpairing-when-changing-the-hierarchy.patch
515-dix-disable-all-devices-before-shutdown.patch
+516-dix-dont-emulate-scroll-events-for-non-existing-axes.patch
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