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iw_cxgb4: Guard against null cm_id in dump_ep/qp 

Endpoints that are aborting can have already dereferenced the
cm_id and set ep->com.cm_id to NULL.  So guard against that in
dump_ep() and dump_qp().

Also create a common function for setting up ip address pointers
since the same logic is needed in several places.

Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Ganesh Goudar 2017-01-20 12:32:01 +05:30 committed by Doug Ledford
parent f57e8ca50e
commit bab572f1d4
1 changed files with 84 additions and 49 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

133
drivers/infiniband/hw/cxgb4/device.c
View File

@ -214,6 +214,52 @@ static const struct file_operations wr_log_debugfs_fops = {
.write = wr_log_clear,
};
static struct sockaddr_in zero_sin = {
.sin_family = AF_INET,
};
static struct sockaddr_in6 zero_sin6 = {
.sin6_family = AF_INET6,
};
static void set_ep_sin_addrs(struct c4iw_ep *ep,
struct sockaddr_in **lsin,
struct sockaddr_in **rsin,
struct sockaddr_in **m_lsin,
struct sockaddr_in **m_rsin)
{
struct iw_cm_id *id = ep->com.cm_id;
*lsin = (struct sockaddr_in *)&ep->com.local_addr;
*rsin = (struct sockaddr_in *)&ep->com.remote_addr;
if (id) {
*m_lsin = (struct sockaddr_in *)&id->m_local_addr;
*m_rsin = (struct sockaddr_in *)&id->m_remote_addr;
} else {
*m_lsin = &zero_sin;
*m_rsin = &zero_sin;
}
}
static void set_ep_sin6_addrs(struct c4iw_ep *ep,
struct sockaddr_in6 **lsin6,
struct sockaddr_in6 **rsin6,
struct sockaddr_in6 **m_lsin6,
struct sockaddr_in6 **m_rsin6)
{
struct iw_cm_id *id = ep->com.cm_id;
*lsin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
*rsin6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
if (id) {
*m_lsin6 = (struct sockaddr_in6 *)&id->m_local_addr;
*m_rsin6 = (struct sockaddr_in6 *)&id->m_remote_addr;
} else {
*m_lsin6 = &zero_sin6;
*m_rsin6 = &zero_sin6;
}
}
static int dump_qp(int id, void *p, void *data)
{
struct c4iw_qp *qp = p;
@ -229,16 +275,15 @@ static int dump_qp(int id, void *p, void *data)
return 1;
if (qp->ep) {
if (qp->ep->com.local_addr.ss_family == AF_INET) {
struct sockaddr_in *lsin = (struct sockaddr_in *)
&qp->ep->com.cm_id->local_addr;
struct sockaddr_in *rsin = (struct sockaddr_in *)
&qp->ep->com.cm_id->remote_addr;
struct sockaddr_in *mapped_lsin = (struct sockaddr_in *)
&qp->ep->com.cm_id->m_local_addr;
struct sockaddr_in *mapped_rsin = (struct sockaddr_in *)
&qp->ep->com.cm_id->m_remote_addr;
struct c4iw_ep *ep = qp->ep;
if (ep->com.local_addr.ss_family == AF_INET) {
struct sockaddr_in *lsin;
struct sockaddr_in *rsin;
struct sockaddr_in *m_lsin;
struct sockaddr_in *m_rsin;
set_ep_sin_addrs(ep, &lsin, &rsin, &m_lsin, &m_rsin);
cc = snprintf(qpd->buf + qpd->pos, space,
"rc qp sq id %u rq id %u state %u "
"onchip %u ep tid %u state %u "
@ -246,23 +291,19 @@ static int dump_qp(int id, void *p, void *data)
qp->wq.sq.qid, qp->wq.rq.qid,
(int)qp->attr.state,
qp->wq.sq.flags & T4_SQ_ONCHIP,
qp->ep->hwtid, (int)qp->ep->com.state,
ep->hwtid, (int)ep->com.state,
&lsin->sin_addr, ntohs(lsin->sin_port),
ntohs(mapped_lsin->sin_port),
ntohs(m_lsin->sin_port),
&rsin->sin_addr, ntohs(rsin->sin_port),
ntohs(mapped_rsin->sin_port));
ntohs(m_rsin->sin_port));
} else {
struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)
&qp->ep->com.cm_id->local_addr;
struct sockaddr_in6 *rsin6 = (struct sockaddr_in6 *)
&qp->ep->com.cm_id->remote_addr;
struct sockaddr_in6 *mapped_lsin6 =
(struct sockaddr_in6 *)
&qp->ep->com.cm_id->m_local_addr;
struct sockaddr_in6 *mapped_rsin6 =
(struct sockaddr_in6 *)
&qp->ep->com.cm_id->m_remote_addr;
struct sockaddr_in6 *lsin6;
struct sockaddr_in6 *rsin6;
struct sockaddr_in6 *m_lsin6;
struct sockaddr_in6 *m_rsin6;
set_ep_sin6_addrs(ep, &lsin6, &rsin6, &m_lsin6,
&m_rsin6);
cc = snprintf(qpd->buf + qpd->pos, space,
"rc qp sq id %u rq id %u state %u "
"onchip %u ep tid %u state %u "
@ -270,13 +311,13 @@ static int dump_qp(int id, void *p, void *data)
qp->wq.sq.qid, qp->wq.rq.qid,
(int)qp->attr.state,
qp->wq.sq.flags & T4_SQ_ONCHIP,
qp->ep->hwtid, (int)qp->ep->com.state,
ep->hwtid, (int)ep->com.state,
&lsin6->sin6_addr,
ntohs(lsin6->sin6_port),
ntohs(mapped_lsin6->sin6_port),
ntohs(m_lsin6->sin6_port),
&rsin6->sin6_addr,
ntohs(rsin6->sin6_port),
ntohs(mapped_rsin6->sin6_port));
ntohs(m_rsin6->sin6_port));
}
} else
cc = snprintf(qpd->buf + qpd->pos, space,
@ -533,15 +574,12 @@ static int dump_ep(int id, void *p, void *data)
return 1;
if (ep->com.local_addr.ss_family == AF_INET) {
struct sockaddr_in *lsin = (struct sockaddr_in *)
&ep->com.cm_id->local_addr;
struct sockaddr_in *rsin = (struct sockaddr_in *)
&ep->com.cm_id->remote_addr;
struct sockaddr_in *mapped_lsin = (struct sockaddr_in *)
&ep->com.cm_id->m_local_addr;
struct sockaddr_in *mapped_rsin = (struct sockaddr_in *)
&ep->com.cm_id->m_remote_addr;
struct sockaddr_in *lsin;
struct sockaddr_in *rsin;
struct sockaddr_in *m_lsin;
struct sockaddr_in *m_rsin;
set_ep_sin_addrs(ep, &lsin, &rsin, &m_lsin, &m_rsin);
cc = snprintf(epd->buf + epd->pos, space,
"ep %p cm_id %p qp %p state %d flags 0x%lx "
"history 0x%lx hwtid %d atid %d "
@ -553,19 +591,16 @@ static int dump_ep(int id, void *p, void *data)
ep->stats.connect_neg_adv,
ep->stats.abort_neg_adv,
&lsin->sin_addr, ntohs(lsin->sin_port),
ntohs(mapped_lsin->sin_port),
ntohs(m_lsin->sin_port),
&rsin->sin_addr, ntohs(rsin->sin_port),
ntohs(mapped_rsin->sin_port));
ntohs(m_rsin->sin_port));
} else {
struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)
&ep->com.cm_id->local_addr;
struct sockaddr_in6 *rsin6 = (struct sockaddr_in6 *)
&ep->com.cm_id->remote_addr;
struct sockaddr_in6 *mapped_lsin6 = (struct sockaddr_in6 *)
&ep->com.cm_id->m_local_addr;
struct sockaddr_in6 *mapped_rsin6 = (struct sockaddr_in6 *)
&ep->com.cm_id->m_remote_addr;
struct sockaddr_in6 *lsin6;
struct sockaddr_in6 *rsin6;
struct sockaddr_in6 *m_lsin6;
struct sockaddr_in6 *m_rsin6;
set_ep_sin6_addrs(ep, &lsin6, &rsin6, &m_lsin6, &m_rsin6);
cc = snprintf(epd->buf + epd->pos, space,
"ep %p cm_id %p qp %p state %d flags 0x%lx "
"history 0x%lx hwtid %d atid %d "
@ -577,9 +612,9 @@ static int dump_ep(int id, void *p, void *data)
ep->stats.connect_neg_adv,
ep->stats.abort_neg_adv,
&lsin6->sin6_addr, ntohs(lsin6->sin6_port),
ntohs(mapped_lsin6->sin6_port),
ntohs(m_lsin6->sin6_port),
&rsin6->sin6_addr, ntohs(rsin6->sin6_port),
ntohs(mapped_rsin6->sin6_port));
ntohs(m_rsin6->sin6_port));
}
if (cc < space)
epd->pos += cc;
@ -600,7 +635,7 @@ static int dump_listen_ep(int id, void *p, void *data)
if (ep->com.local_addr.ss_family == AF_INET) {
struct sockaddr_in *lsin = (struct sockaddr_in *)
&ep->com.cm_id->local_addr;
struct sockaddr_in *mapped_lsin = (struct sockaddr_in *)
struct sockaddr_in *m_lsin = (struct sockaddr_in *)
&ep->com.cm_id->m_local_addr;
cc = snprintf(epd->buf + epd->pos, space,
@ -609,11 +644,11 @@ static int dump_listen_ep(int id, void *p, void *data)
ep, ep->com.cm_id, (int)ep->com.state,
ep->com.flags, ep->stid, ep->backlog,
&lsin->sin_addr, ntohs(lsin->sin_port),
ntohs(mapped_lsin->sin_port));
ntohs(m_lsin->sin_port));
} else {
struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)
&ep->com.cm_id->local_addr;
struct sockaddr_in6 *mapped_lsin6 = (struct sockaddr_in6 *)
struct sockaddr_in6 *m_lsin6 = (struct sockaddr_in6 *)
&ep->com.cm_id->m_local_addr;
cc = snprintf(epd->buf + epd->pos, space,
@ -622,7 +657,7 @@ static int dump_listen_ep(int id, void *p, void *data)
ep, ep->com.cm_id, (int)ep->com.state,
ep->com.flags, ep->stid, ep->backlog,
&lsin6->sin6_addr, ntohs(lsin6->sin6_port),
ntohs(mapped_lsin6->sin6_port));
ntohs(m_lsin6->sin6_port));
}
if (cc < space)
epd->pos += cc;