[PATCH AUTOSEL 4.19 41/97] scsi: target: iscsi: cxgbit: fix csk leak

Sasha Levin
2018-12-26T22:37:11Z

From: Varun Prakash <varun@chelsio.com>

[ Upstream commit 801df68d617e3cb831f531c99fa6003620e6b343 ]

csk leak can happen if a new TCP connection gets established after
cxgbit_accept_np() returns, to fix this leak free remaining csk in
cxgbit_free_np().

Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/target/iscsi/cxgbit/cxgbit_cm.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/target/iscsi/cxgbit/cxgbit_cm.c b/drivers/target/iscsi/cxgbit/cxgbit_cm.c
index 8de16016b6de..b289b90ae6dc 100644
--- a/drivers/target/iscsi/cxgbit/cxgbit_cm.c
+++ b/drivers/target/iscsi/cxgbit/cxgbit_cm.c
@@ -631,8 +631,11 @@ static void cxgbit_send_halfclose(struct cxgbit_sock *csk)

static void cxgbit_arp_failure_discard(void *handle, struct sk_buff *skb)
{
+ struct cxgbit_sock *csk = handle;
+
pr_debug("%s cxgbit_device %p\n", __func__, handle);
kfree_skb(skb);
+ cxgbit_put_csk(csk);
}

static void cxgbit_abort_arp_failure(void *handle, struct sk_buff *skb)
@@ -1190,7 +1193,7 @@ cxgbit_pass_accept_rpl(struct cxgbit_sock *csk, struct cpl_pass_accept_req *req)
rpl5->opt0 = cpu_to_be64(opt0);
rpl5->opt2 = cpu_to_be32(opt2);
set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->ctrlq_idx);
- t4_set_arp_err_handler(skb, NULL, cxgbit_arp_failure_discard);
+ t4_set_arp_err_handler(skb, csk, cxgbit_arp_failure_discard);
cxgbit_l2t_send(csk->com.cdev, skb, csk->l2t);
}

--
2.19.1