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authorAlok Kataria <akataria@vmware.com>2009-08-04 15:34:22 -0700
committerIngo Molnar <mingo@elte.hu>2009-08-05 10:20:29 +0200
commit7d5b005652bc5ae3e1e0efc53fd0e25a643ec506 (patch)
treed68a3d7cae8eb10a61ee72a68423dde0c0c4aeb2 /arch/x86/kernel/vmi_32.c
parent90bc1a658a53f8832ee799685703977a450e5af9 (diff)
downloadlinux-linaro-android-7d5b005652bc5ae3e1e0efc53fd0e25a643ec506.tar.gz
x86: Fix VMI && stack protector
With CONFIG_STACK_PROTECTOR turned on, VMI doesn't boot with more than one processor. The problem is with the gs value not being initialized correctly when registering the secondary processor for VMI's case. The patch below initializes the gs value for the AP to __KERNEL_STACK_CANARY. Without this the secondary processor keeps on taking a GP on every gs access. Signed-off-by: Alok N Kataria <akataria@vmware.com> Cc: <stable@kernel.org> # for v2.6.30.x LKML-Reference: <1249425262.18955.40.camel@ank32.eng.vmware.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/vmi_32.c')
-rw-r--r--arch/x86/kernel/vmi_32.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index b263423fbe2..95a7289e4b0 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -441,7 +441,7 @@ vmi_startup_ipi_hook(int phys_apicid, unsigned long start_eip,
ap.ds = __USER_DS;
ap.es = __USER_DS;
ap.fs = __KERNEL_PERCPU;
- ap.gs = 0;
+ ap.gs = __KERNEL_STACK_CANARY;
ap.eflags = 0;