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由 Peter Maydell 提交于
If userspace specifies a short buffer for a target sockaddr, the kernel will only copy in as much as it has space for (or none at all if the length is zero) -- see the kernel move_addr_to_user() function. Mimic this in QEMU's host_to_target_sockaddr() routine. In particular, this fixes a segfault running the LTP recvfrom01 test, where the guest makes a recvfrom() call with a bad buffer pointer and other parameters which cause the kernel to set the addrlen to zero; because we did not skip the attempt to swap the sa_family field we segfaulted on the bad address. Signed-off-by: NPeter Maydell <peter.maydell@linaro.org> Signed-off-by: NRiku Voipio <riku.voipio@linaro.org>
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