]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
x86, vdso: Fix an OOPS accessing the HPET mapping w/o an HPET
authorAndy Lutomirski <luto@amacapital.net>
Wed, 14 May 2014 23:23:13 +0000 (16:23 -0700)
committerH. Peter Anvin <hpa@linux.intel.com>
Wed, 21 May 2014 23:14:04 +0000 (16:14 -0700)
commit368b69a5b010cb00fc9ea04d588cff69af1a1359
treeb66ede1750aac2feee6d6ea6163154afff13230b
parent4b660a7f5c8099d88d1a43d8ae138965112592c7
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
running a 32-bit program and reading a couple of pages before the vdso.
This should send SIGBUS instead of OOPSing.

The bug was introduced by:

commit 7a59ed415f5b57469e22e41fc4188d5399e0b194
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.

Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/e99025d887d6670b6c4d81e6ccfeeb83770b21e9.1400109621.git.luto@amacapital.net
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
arch/x86/vdso/vdso32-setup.c