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hmp: fix "dump-quest-memory" segfault 

Running QEMU with "qemu-system-x86_64 -M none -nographic -m 256" and executing
"dump-guest-memory /dev/null 0 8192" results in segfault.
Fix by checking if we have CPU.

Signed-off-by: Iwona Kotlarska <iwona260909@gmail.com>
Message-Id: <20170330050924.22134-1-iwona260909@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
   Fixed up title
This commit is contained in:
Iwona Kotlarska 2017-03-30 07:09:24 +02:00 committed by Dr. David Alan Gilbert
parent 05a6f451eb
commit fd5d23babf
1 changed files with 1 additions and 2 deletions
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3
target/i386/arch_dump.c
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@ -391,8 +391,7 @@ int cpu_get_dump_info(ArchDumpInfo *info,
#ifdef TARGET_X86_64
X86CPU *first_x86_cpu = X86_CPU(first_cpu);
lma = !!(first_x86_cpu->env.hflags & HF_LMA_MASK);
lma = first_cpu && (first_x86_cpu->env.hflags & HF_LMA_MASK);
#endif
if (lma) {