ipv6: sr: fix TLVs not being copied using setsockopt
Function ipv6_push_rthdr4 allows to add an IPv6 Segment Routing Header to a socket through setsockopt, but the current implementation doesn't copy possible TLVs at the end of the SRH received from userspace. Therefore, the execution of the following branch if (sr_has_hmac(sr_phdr)) { ... } will never complete since the len and type fields of a possible HMAC TLV are not copied, hence seg6_get_tlv_hmac will return an error, and the HMAC will not be computed. This commit adds a memcpy in case TLVs have been appended to the SRH. Fixes: a149e7c7 ("ipv6: sr: add support for SRH injection through setsockopt") Acked-by: NDavid Lebrun <dlebrun@google.com> Signed-off-by: NMathieu Xhonneux <m.xhonneux@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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