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migration: don't segfault on invalid input

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host_from_stream_offset returns NULL on error,
return error instead of trying to use that address,
to avoid segfault on invalid stream.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2010-10-17 20:43:40 +02:00
parent c57c846a80
commit 492fb99c4b
1 changed files with 3 additions and 0 deletions
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3
arch_init.c
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@ -390,6 +390,9 @@ int ram_load(QEMUFile *f, void *opaque, int version_id)
host = qemu_get_ram_ptr(addr); host = qemu_get_ram_ptr(addr);
else else
host = host_from_stream_offset(f, addr, flags); host = host_from_stream_offset(f, addr, flags);
if (!host) {
return -EINVAL;
}
ch = qemu_get_byte(f); ch = qemu_get_byte(f);
memset(host, ch, TARGET_PAGE_SIZE); memset(host, ch, TARGET_PAGE_SIZE);