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authorFaisal Latif <faisal.latif@intel.com>2009-12-10 02:54:18 +0300
committerRoland Dreier <rolandd@cisco.com>2009-12-10 02:54:18 +0300
commit886f98a31586fd560fe83c44ad72e3ebe62f8e2e (patch)
treec0579b102cd6814f6aaa4f0bde6ba204bfeb03f1 /drivers/infiniband
parentf9f3f1e08b4d66bfda2a0c2d49a26c80489a0725 (diff)
downloadlinux-886f98a31586fd560fe83c44ad72e3ebe62f8e2e.tar.xz
RDMA/nes: Fix Xansation test crash on cm_node ref_count
While running a Xansation test, an active side node crashed. The problem started on the passive side, which generated an STtag that was 0. The passive side sent a TERMINATE instead of an MPA REJECT msg. The active side, receives TERMINATE and sends connect_err() and set the cm_node state to CLOSED. The passive side sends FIN + ACK after TERMINATE. Active side ends up in handle_ack_pkt() and send_reset(). send_reset() consumes 1 cm_node's ref_count. Because the cm_node is in CLOSED state, which means that cm_node will be destroyed after completion of the connect_err() indication, CM will crash after send_reset(). Signed-off-by: Faisal Latif <faisal.latif@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/nes/nes_cm.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/nes/nes_cm.c b/drivers/infiniband/hw/nes/nes_cm.c
index 20e21f1a18b9..a25816812ced 100644
--- a/drivers/infiniband/hw/nes/nes_cm.c
+++ b/drivers/infiniband/hw/nes/nes_cm.c
@@ -1610,6 +1610,7 @@ static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
break;
case NES_CM_STATE_CLOSED:
cleanup_retrans_entry(cm_node);
+ add_ref_cm_node(cm_node);
send_reset(cm_node, skb);
break;
case NES_CM_STATE_TSA:
@@ -1661,9 +1662,15 @@ static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
passive_open_err(cm_node, skb, 1);
break;
case NES_CM_STATE_LISTENING:
+ cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
+ cleanup_retrans_entry(cm_node);
+ cm_node->state = NES_CM_STATE_CLOSED;
+ send_reset(cm_node, skb);
+ break;
case NES_CM_STATE_CLOSED:
cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
cleanup_retrans_entry(cm_node);
+ add_ref_cm_node(cm_node);
send_reset(cm_node, skb);
break;
case NES_CM_STATE_ESTABLISHED:
@@ -1732,8 +1739,13 @@ static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
dev_kfree_skb_any(skb);
break;
case NES_CM_STATE_LISTENING:
+ cleanup_retrans_entry(cm_node);
+ cm_node->state = NES_CM_STATE_CLOSED;
+ send_reset(cm_node, skb);
+ break;
case NES_CM_STATE_CLOSED:
cleanup_retrans_entry(cm_node);
+ add_ref_cm_node(cm_node);
send_reset(cm_node, skb);
break;
case NES_CM_STATE_LAST_ACK:
@@ -2193,8 +2205,11 @@ static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_nod
case NES_CM_STATE_CLOSING:
ret = -1;
break;
- case NES_CM_STATE_MPAREJ_RCVD:
case NES_CM_STATE_LISTENING:
+ cleanup_retrans_entry(cm_node);
+ send_reset(cm_node, NULL);
+ break;
+ case NES_CM_STATE_MPAREJ_RCVD:
case NES_CM_STATE_UNKNOWN:
case NES_CM_STATE_INITED:
case NES_CM_STATE_CLOSED: