netfilter: nf_conntrack_h323: lost .data_len definition for Q.931/ipv6
Could you please push this patch into stable@? it fixes memory corruption in kernels v3.5 .. v4.10 Lost .data_len definition leads to write beyond end of struct nf_ct_h323_master. Usually it corrupts following struct nf_conn_nat, however if nat is not loaded it corrupts following slab object. In mainline this problem went away in v4.11, after commit9f0f3ebeda
("netfilter: helpers: remove data_len usage for inkernel helpers") however many stable kernels are still affected. Fixes:1afc56794e
("netfilter: nf_ct_helper: implement variable length helper private data") # v3.5 cc: stable@vger.kernel.org Reviewed-by: Florian Westphal <fw@strlen.de> Signed-off-by: Vasily Averin <vvs@virtuozzo.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Change-Id: I6869e5b3c1c5a38f58d0738aed2224ce0dba5e43 Git-commit: 396ba2fc4f27ef6c44bbc0098bfddf4da76dc4c9 Git-repo: https://android.googlesource.com/kernel/msm Signed-off-by: Uppala Revanth Kumar <urevanth@codeaurora.org>
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@ -1203,6 +1203,7 @@ static struct nf_conntrack_helper nf_conntrack_helper_q931[] __read_mostly = {
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{
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.name = "Q.931",
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.me = THIS_MODULE,
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.data_len = sizeof(struct nf_ct_h323_master),
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.tuple.src.l3num = AF_INET6,
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.tuple.src.u.tcp.port = cpu_to_be16(Q931_PORT),
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.tuple.dst.protonum = IPPROTO_TCP,
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