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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-02-19 14:44:14 +0100 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-03-07 12:33:36 -0500 |
| commit | 907c39407e1407d50768943367852c5abd5cde14 (patch) | |
| tree | 9b802e9c8264da7e5f940f0ccd291bd73291a4f1 /drivers | |
| parent | 82f8c49d31dc618d1508a2870595eab2f7d5cbbd (diff) | |
s390/compat: correct restore of high gprs on signal return
[ Upstream commit 342300cc9cd3428bc6bfe5809bfcc1b9a0f06702 ]
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: stable@vger.kernel.org # 3.8+
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions