2015-07-10 17:21:29 +02:00
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# Commit 142473cfce41a565898e0fa33dc98a1f5e41abe4
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# Date 2015-06-25 14:57:04 +0200
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# Author Andrew Cooper <andrew.cooper3@citrix.com>
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# Committer Jan Beulich <jbeulich@suse.com>
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x86/traps: avoid using current too early on boot
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Early on boot, current has the sentinel value 0xfffff000. Blindly using it in
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show_registers() causes a nested failure and no useful information printed
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from an early crash.
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Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
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--- a/xen/arch/x86/x86_64/traps.c
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+++ b/xen/arch/x86/x86_64/traps.c
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2015-08-27 00:28:15 +02:00
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@@ -86,7 +86,7 @@ void show_registers(const struct cpu_use
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2015-07-10 17:21:29 +02:00
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struct cpu_user_regs fault_regs = *regs;
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unsigned long fault_crs[8];
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enum context context;
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- struct vcpu *v = current;
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+ struct vcpu *v = system_state >= SYS_STATE_smp_boot ? current : NULL;
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if ( guest_mode(regs) && has_hvm_container_vcpu(v) )
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{
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