you should post patches on xorg-devel@ and discuss the bug on the
upstream bugtracker, if you want this to get forward
** Changed in: libx11 (Ubuntu)
Importance: High => Medium
** Changed in: libx11 (Ubuntu)
Assignee: Canonical X.org (canonical-x) => (unassigned)
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https://bugs.launchpad.net/bugs/1062534
Title:
Thread unsafe access to internal linked list, breaks Origin games in
Wine
Status in xlibs:
Confirmed
Status in libx11 package in Ubuntu:
Triaged
Bug description:
In file src/xlibi18n/lcConv.c the following linked list head is
defined
static XlcConverterList conv_list = NULL;
Which is then modified by _XlcSetConverter and get_converter in a non
thread-safe manner. Inside get_converter the list is reorderder to
increase the efficiency of looking up the same element the next time,
but this is especially dangerous since a seemingly read-only method is
actually modifying the data.
Modifying the list in such thread unsafe manner does case the list to
become garbled in some workloads and causes infinite loops when the
get_converter is invoked. The solution I suggest is to add a mutex or
spinlock around accesses to the linked list, I would it myself but I'm
not sure about what is the usual mutex implementation for this
project.
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