diff options
Diffstat (limited to 'net/ipv6/ip6_flowlabel.c')
| -rw-r--r-- | net/ipv6/ip6_flowlabel.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c index b6c73da5ff35..2d5ce376c265 100644 --- a/net/ipv6/ip6_flowlabel.c +++ b/net/ipv6/ip6_flowlabel.c @@ -225,16 +225,20 @@ struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space, struct ip6_flowlabel * fl, struct ipv6_txoptions * fopt) { - struct ipv6_txoptions * fl_opt = fl->opt; + struct ipv6_txoptions * fl_opt = fl ? fl->opt : NULL; - if (fopt == NULL || fopt->opt_flen == 0) - return fl_opt; + if (fopt == NULL || fopt->opt_flen == 0) { + if (!fl_opt || !fl_opt->dst0opt || fl_opt->srcrt) + return fl_opt; + } if (fl_opt != NULL) { opt_space->hopopt = fl_opt->hopopt; - opt_space->dst0opt = fl_opt->dst0opt; + opt_space->dst0opt = fl_opt->srcrt ? fl_opt->dst0opt : NULL; opt_space->srcrt = fl_opt->srcrt; opt_space->opt_nflen = fl_opt->opt_nflen; + if (fl_opt->dst0opt && !fl_opt->srcrt) + opt_space->opt_nflen -= ipv6_optlen(fl_opt->dst0opt); } else { if (fopt->opt_nflen == 0) return fopt; |