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linux(4): Handle multiple mbufs in a control message chain in recvmsg

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PR:		230274
MFC after:	2 weeks
This commit is contained in:
Dmitry Chagin 2022-05-28 23:48:45 +03:00
parent 31d7f3e9ce
commit 3735f9cff1
1 changed files with 3 additions and 4 deletions
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7
sys/compat/linux/linux_socket.c
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@ -1727,7 +1727,7 @@ linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr,
socklen_t datalen, maxlen, outlen;
struct l_msghdr l_msghdr;
struct iovec *iov, *uiov;
struct mbuf *control = NULL;
struct mbuf *m, *control = NULL;
struct mbuf **controlp;
struct sockaddr *sa;
caddr_t outbuf;
@ -1797,10 +1797,10 @@ linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr,
lcm = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO);
msg->msg_control = mtod(control, struct cmsghdr *);
msg->msg_controllen = control->m_len;
cm = CMSG_FIRSTHDR(msg);
outbuf = PTRIN(l_msghdr.msg_control);
outlen = 0;
while (cm != NULL) {
for (m = control; m != NULL; m = m->m_next) {
cm = mtod(m, struct cmsghdr *);
lcm->cmsg_type = bsd_to_linux_cmsg_type(p, cm->cmsg_type,
cm->cmsg_level);
lcm->cmsg_level = bsd_to_linux_sockopt_level(cm->cmsg_level);
@ -1876,7 +1876,6 @@ cont:
if (error == 0) {
outbuf += LINUX_CMSG_ALIGN(datalen);
outlen += LINUX_CMSG_LEN(datalen);
cm = CMSG_NXTHDR(msg, cm);
}
}
err: