No support for s390 in Trusty
** Also affects: linux (Ubuntu Vivid)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Trusty)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Xenial)
Importance: Critical
Assignee: Andy Whitcroft (apw)
Status: Confirmed
** Also affects: linux (Ubuntu Wily)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Xenial)
Status: Confirmed => Fix Committed
** Changed in: linux (Ubuntu Xenial)
Assignee: Andy Whitcroft (apw) => Tim Gardner (timg-tpi)
** Changed in: linux (Ubuntu Trusty)
Status: New => In Progress
** Changed in: linux (Ubuntu Trusty)
Assignee: (unassigned) => Tim Gardner (timg-tpi)
** Changed in: linux (Ubuntu Vivid)
Status: New => In Progress
** Changed in: linux (Ubuntu Vivid)
Assignee: (unassigned) => Tim Gardner (timg-tpi)
** Changed in: linux (Ubuntu Wily)
Status: New => In Progress
** Changed in: linux (Ubuntu Wily)
Assignee: (unassigned) => Tim Gardner (timg-tpi)
** Changed in: linux (Ubuntu Trusty)
Status: In Progress => Invalid
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https://bugs.launchpad.net/bugs/1550468
Title:
s390x: correct restore of high gprs on signal return
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Trusty:
Invalid
Status in linux source package in Vivid:
Invalid
Status in linux source package in Wily:
In Progress
Status in linux source package in Xenial:
Fix Committed
Bug description:
== Comment: #0 - Hendrik Brueckner - 2016-02-26 11:02:00 ==
Please backport Linux kernel upstream commit ID:
commit 342300cc9cd3428bc6bfe5809bfcc1b9a0f06702
Author: Martin Schwidefsky <schwidef...@de.ibm.com>
Date: Fri Feb 19 14:44:14 2016 +0100
s390/compat: correct restore of high gprs on signal return
git commit 8070361799ae1e3f4ef347bd10f0a508ac10acfb
"s390: add support for vector extension"
broke 31-bit compat processes in regard to signal handling.
The restore_sigregs_ext32() function is used to restore the
additional
elements from the user space signal frame. Among the additional
elements
are the upper registers halves for 64-bit register support for
31-bit
processes. The copy_from_user that is used to retrieve the high-
gprs
array from the user stack uses an incorrect length, 8 bytes
instead of
64 bytes. This causes incorrect upper register halves to get
loaded.
Cc: sta...@vger.kernel.org # 3.8+
Signed-off-by: Martin Schwidefsky <schwidef...@de.ibm.com>
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