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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-02-03 17:37:15 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-22 12:41:26 -0800 |
| commit | edb11a9bbf10f5056a36a39067ab04cf34447e1d (patch) | |
| tree | 1bad527d755e6485b53e3623938446d104596dc2 /drivers/spi | |
| parent | 312cdf57ee8b7ef9ae1967e243a770dc5557af05 (diff) | |
| download | linux-stable-edb11a9bbf10f5056a36a39067ab04cf34447e1d.tar.gz linux-stable-edb11a9bbf10f5056a36a39067ab04cf34447e1d.tar.bz2 linux-stable-edb11a9bbf10f5056a36a39067ab04cf34447e1d.zip | |
s390: fix kernel crash due to linkage stack instructions
commit 8d7f6690cedb83456edd41c9bd583783f0703bf0 upstream.
The kernel currently crashes with a low-address-protection exception
if a user space process executes an instruction that tries to use the
linkage stack. Set the base-ASTE origin and the subspace-ASTE origin
of the dispatchable-unit-control-table to point to a dummy ASTE.
Set up control register 15 to point to an empty linkage stack with no
room left.
A user space process with a linkage stack instruction will still crash
but with a different exception which is correctly translated to a
segmentation fault instead of a kernel oops.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/spi')
0 files changed, 0 insertions, 0 deletions