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netlink: fix regression with group writers

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Refactoring of argument list to nl_send_one() led to derefercing
wrong union member.  Rename nl_send_one() to a more generic name,
isolate anew nl_send_one() as the callback only for the normal
writer and provide correct argument to nl_send() from nl_send_group().

Fixes:	ff5ad900d2
This commit is contained in:
Gleb Smirnoff 2024-01-09 13:01:28 -08:00
parent 0013741108
commit 09fa78d438
4 changed files with 11 additions and 7 deletions
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4
sys/netlink/netlink_domain.c
View File

@ -233,7 +233,7 @@ nl_send_group(struct nl_writer *nw)
copy = nl_buf_copy(nb);
if (copy != NULL) {
nw->buf = copy;
(void)nl_send_one(nw);
(void)nl_send(nw, nlp_last);
} else {
NLP_LOCK(nlp_last);
if (nlp_last->nl_socket != NULL)
@ -246,7 +246,7 @@ nl_send_group(struct nl_writer *nw)
}
if (nlp_last != NULL) {
nw->buf = nb;
(void)nl_send_one(nw);
(void)nl_send(nw, nlp_last);
} else
nl_buf_free(nb);

3
sys/netlink/netlink_io.c
View File

@ -194,9 +194,8 @@ nl_taskqueue_handler(void *_arg, int pending)
* If no queue overrunes happened, wakes up socket owner.
*/
bool
nl_send_one(struct nl_writer *nw)
nl_send(struct nl_writer *nw, struct nlpcb *nlp)
{
struct nlpcb *nlp = nw->nlp;
struct socket *so = nlp->nl_socket;
struct sockbuf *sb = &so->so_rcv;
struct nl_buf *nb;

7
sys/netlink/netlink_message_writer.c
View File

@ -65,6 +65,13 @@ nlmsg_get_buf(struct nl_writer *nw, u_int len, bool waitok)
return (true);
}
static bool
nl_send_one(struct nl_writer *nw)
{
return (nl_send(nw, nw->nlp));
}
bool
_nlmsg_get_unicast_writer(struct nl_writer *nw, int size, struct nlpcb *nlp)
{

4
sys/netlink/netlink_var.h
View File

@ -130,9 +130,7 @@ void nl_osd_unregister(void);
void nl_set_thread_nlp(struct thread *td, struct nlpcb *nlp);
/* netlink_io.c */
#define NL_IOF_UNTRANSLATED 0x01
#define NL_IOF_IGNORE_LIMIT 0x02
bool nl_send_one(struct nl_writer *);
bool nl_send(struct nl_writer *, struct nlpcb *);
void nlmsg_ack(struct nlpcb *nlp, int error, struct nlmsghdr *nlmsg,
struct nl_pstate *npt);
void nl_on_transmit(struct nlpcb *nlp);