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linux-stable/arch/x86/vdso
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Andy Lutomirski 1e844fb43c x86, vdso: Fix an OOPS accessing the HPET mapping w/o an HPET 
The oops can be triggered in qemu using -no-hpet (but not nohpet) by
reading a couple of pages past the end of the vdso text.  This
should send SIGBUS instead of OOPSing.

The bug was introduced by:

commit 7a59ed415f
Author: Stefani Seibold <stefani@seibold.net>
Date:   Mon Mar 17 23:22:09 2014 +0100

    x86, vdso: Add 32 bit VDSO time support for 32 bit kernel

which is new in 3.15.

This will be fixed separately in 3.15, but that patch will not apply
to tip/x86/vdso.  This is the equivalent fix for tip/x86/vdso and,
presumably, 3.16.

Cc: Stefani Seibold <stefani@seibold.net>
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/c8b0a9a0b8d011a8b273cbb2de88d37190ed2751.1400538962.git.luto@amacapital.net
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-05-20 11:36:21 -07:00
..
vdso32 x86, vdso: Remove vestiges of VDSO_PRELINK and some outdated comments 2014-05-05 13:19:07 -07:00
.gitignore x86, vdso: Reimplement vdso.so preparation in build-time C 2014-05-05 13:18:51 -07:00
checkundef.sh x86, vdso: Don't quote $nm in the script for checking vdso references 2010-07-27 23:52:29 -07:00
Makefile x86, vdso: Reimplement vdso.so preparation in build-time C 2014-05-05 13:18:51 -07:00
vclock_gettime.c x86, vdso: Move the vvar and hpet mappings next to the 64-bit vDSO 2014-05-05 13:19:01 -07:00
vdso-layout.lds.S x86, vdso: Move the vvar and hpet mappings next to the 64-bit vDSO 2014-05-05 13:19:01 -07:00
vdso-note.S
vdso.lds.S x86, vdso: Remove vestiges of VDSO_PRELINK and some outdated comments 2014-05-05 13:19:07 -07:00
vdso2c.c x86, vdso: Move the 32-bit vdso special pages after the text 2014-05-05 13:18:56 -07:00
vdso2c.h x86, vdso: Move the 32-bit vdso special pages after the text 2014-05-05 13:18:56 -07:00
vdso32-setup.c x86, vdso: Move the 32-bit vdso special pages after the text 2014-05-05 13:18:56 -07:00
vdsox32.lds.S x86, vdso: Remove vestiges of VDSO_PRELINK and some outdated comments 2014-05-05 13:19:07 -07:00
vgetcpu.c x86: vdso: pvclock gettime support 2012-11-27 23:29:11 -02:00
vma.c x86, vdso: Fix an OOPS accessing the HPET mapping w/o an HPET 2014-05-20 11:36:21 -07:00