exec: Add missing rcu_read_unlock
rcu_read_unlock was not called if the address_space_access_valid result is negative. This caused (at least) a problem when qemu on PPC/E500+TAP failed to terminate properly and instead got stuck in a deadlock. Signed-off-by: Roman Kapl <rka@sysgo.com> Message-Id: <20170109110921.4931-1-rka@sysgo.com> Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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