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Fixup memory management for fetching options in ip_ctloutput()

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Submitted by:	Jason Eggleston <jason@eggnet.com>
Sponsored by:	Limelight Networks
Differential Revision:	https://reviews.freebsd.org/D14621
This commit is contained in:
Sean Bruno 2018-07-14 16:19:46 +00:00
parent f6982511f8
commit 179a28b098
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=336282
1 changed files with 10 additions and 4 deletions
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14
sys/netinet/ip_output.c
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@ -1256,12 +1256,18 @@ ip_ctloutput(struct socket *so, struct sockopt *sopt)
switch (sopt->sopt_name) {
case IP_OPTIONS:
case IP_RETOPTS:
if (inp->inp_options)
if (inp->inp_options) {
unsigned long len = ulmin(inp->inp_options->m_len, sopt->sopt_valsize);
struct mbuf *options = malloc(len, M_TEMP, M_WAITOK);
INP_RLOCK(inp);
bcopy(inp->inp_options, options, len);
INP_RUNLOCK(inp);
error = sooptcopyout(sopt,
mtod(inp->inp_options,
mtod(options,
char *),
inp->inp_options->m_len);
else
len);
free(options, M_TEMP);
} else
sopt->sopt_valsize = 0;
break;