netdev - [PATCH rdma-next 1/8] RDMA/qedr: Fix qp structure memory leak

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Date:   Wed, 2 Sep 2020 19:57:34 +0300
From:   Michal Kalderon <michal.kalderon@...vell.com>
To:     <mkalderon@...vell.com>, <aelior@...vell.com>,
        <dledford@...hat.com>, <jgg@...pe.ca>, <davem@...emloft.net>
CC:     <linux-rdma@...r.kernel.org>, <netdev@...r.kernel.org>,
        Michal Kalderon <michal.kalderon@...vell.com>
Subject: [PATCH rdma-next 1/8] RDMA/qedr: Fix qp structure memory leak

The qedr_qp structure wasn't freed when the protocol was RoCE.
kmemleak output when running basic RoCE scenario.

unreferenced object 0xffff927ad7e22c00 (size 1024):
  comm "ib_send_bw", pid 7082, jiffies 4384133693 (age 274.698s)
  hex dump (first 32 bytes):
    00 b0 cd a2 79 92 ff ff 00 3f a1 a2 79 92 ff ff  ....y....?..y...
    00 ee 5c dd 80 92 ff ff 00 f6 5c dd 80 92 ff ff  ..\.......\.....
  backtrace:
    [<00000000b2ba0f35>] qedr_create_qp+0xb3/0x6c0 [qedr]
    [<00000000e85a43dd>] ib_uverbs_handler_UVERBS_METHOD_QP_CREATE+0x555/0xad0 [ib_uverbs]
    [<00000000fee4d029>] ib_uverbs_cmd_verbs+0xa5a/0xb80 [ib_uverbs]
    [<000000005d622660>] ib_uverbs_ioctl+0xa4/0x110 [ib_uverbs]
    [<00000000eb4cdc71>] ksys_ioctl+0x87/0xc0
    [<00000000abe6b23a>] __x64_sys_ioctl+0x16/0x20
    [<0000000046e7cef4>] do_syscall_64+0x4d/0x90
    [<00000000c6948f76>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: 1212767e23bb ("qedr: Add wrapping generic structure for qpidr and
adjust idr routines")
Signed-off-by: Michal Kalderon <michal.kalderon@...vell.com>
---
 drivers/infiniband/hw/qedr/verbs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c
index b49bef94637e..e35f2a20bfdf 100644
--- a/drivers/infiniband/hw/qedr/verbs.c
+++ b/drivers/infiniband/hw/qedr/verbs.c
@@ -2752,6 +2752,8 @@ int qedr_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
 
 	if (rdma_protocol_iwarp(&dev->ibdev, 1))
 		qedr_iw_qp_rem_ref(&qp->ibqp);
+	else
+		kfree(qp);
 
 	return 0;
 }
-- 
2.14.5