[IPV6]: Fix kernel OOPs when setting sticky socket options.
Bug noticed by Remi Denis-Courmont <rdenis@simphalempin.com>. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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dd1a47c21e
Коммит
99c7bc0133
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@ -635,14 +635,17 @@ ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
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struct ipv6_txoptions *opt2;
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int err;
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if (newtype != IPV6_HOPOPTS && opt->hopopt)
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tot_len += CMSG_ALIGN(ipv6_optlen(opt->hopopt));
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if (newtype != IPV6_RTHDRDSTOPTS && opt->dst0opt)
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tot_len += CMSG_ALIGN(ipv6_optlen(opt->dst0opt));
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if (newtype != IPV6_RTHDR && opt->srcrt)
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tot_len += CMSG_ALIGN(ipv6_optlen(opt->srcrt));
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if (newtype != IPV6_DSTOPTS && opt->dst1opt)
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tot_len += CMSG_ALIGN(ipv6_optlen(opt->dst1opt));
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if (opt) {
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if (newtype != IPV6_HOPOPTS && opt->hopopt)
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tot_len += CMSG_ALIGN(ipv6_optlen(opt->hopopt));
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if (newtype != IPV6_RTHDRDSTOPTS && opt->dst0opt)
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tot_len += CMSG_ALIGN(ipv6_optlen(opt->dst0opt));
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if (newtype != IPV6_RTHDR && opt->srcrt)
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tot_len += CMSG_ALIGN(ipv6_optlen(opt->srcrt));
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if (newtype != IPV6_DSTOPTS && opt->dst1opt)
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tot_len += CMSG_ALIGN(ipv6_optlen(opt->dst1opt));
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}
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if (newopt && newoptlen)
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tot_len += CMSG_ALIGN(newoptlen);
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@ -659,25 +662,25 @@ ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
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opt2->tot_len = tot_len;
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p = (char *)(opt2 + 1);
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err = ipv6_renew_option(opt->hopopt, newopt, newoptlen,
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err = ipv6_renew_option(opt ? opt->hopopt : NULL, newopt, newoptlen,
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newtype != IPV6_HOPOPTS,
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&opt2->hopopt, &p);
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if (err)
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goto out;
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err = ipv6_renew_option(opt->dst0opt, newopt, newoptlen,
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err = ipv6_renew_option(opt ? opt->dst0opt : NULL, newopt, newoptlen,
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newtype != IPV6_RTHDRDSTOPTS,
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&opt2->dst0opt, &p);
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if (err)
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goto out;
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err = ipv6_renew_option(opt->srcrt, newopt, newoptlen,
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err = ipv6_renew_option(opt ? opt->srcrt : NULL, newopt, newoptlen,
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newtype != IPV6_RTHDR,
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(struct ipv6_opt_hdr **)opt2->srcrt, &p);
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(struct ipv6_opt_hdr **)&opt2->srcrt, &p);
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if (err)
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goto out;
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err = ipv6_renew_option(opt->dst1opt, newopt, newoptlen,
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err = ipv6_renew_option(opt ? opt->dst1opt : NULL, newopt, newoptlen,
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newtype != IPV6_DSTOPTS,
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&opt2->dst1opt, &p);
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if (err)
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