From 8d7f6690cedb83456edd41c9bd583783f0703bf0 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Mon, 3 Feb 2014 17:37:15 +0100 Subject: [PATCH] s390: fix kernel crash due to linkage stack instructions 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 --- Reading git-format-patch failed