linux-kernel - [PATCH 5.4 248/408] IB/rdmavt: Fix sizeof mismatch

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Message-Id: <20201027135506.567543608@linuxfoundation.org>
Date:   Tue, 27 Oct 2020 14:53:06 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Colin Ian King <colin.king@...onical.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 248/408] IB/rdmavt: Fix sizeof mismatch

From: Colin Ian King <colin.king@...onical.com>

[ Upstream commit 8e71f694e0c819db39af2336f16eb9689f1ae53f ]

An incorrect sizeof is being used, struct rvt_ibport ** is not correct, it
should be struct rvt_ibport *. Note that since ** is the same size as
* this is not causing any issues.  Improve this fix by using
sizeof(*rdi->ports) as this allows us to not even reference the type
of the pointer.  Also remove line breaks as the entire statement can
fit on one line.

Link: https://lore.kernel.org/r/20201008095204.82683-1-colin.king@canonical.com
Addresses-Coverity: ("Sizeof not portable (SIZEOF_MISMATCH)")
Fixes: ff6acd69518e ("IB/rdmavt: Add device structure allocation")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
Reviewed-by: Ira Weiny <ira.weiny@...el.com>
Acked-by: Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>
Signed-off-by: Jason Gunthorpe <jgg@...dia.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/infiniband/sw/rdmavt/vt.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/infiniband/sw/rdmavt/vt.c b/drivers/infiniband/sw/rdmavt/vt.c
index 18da1e1ea9797..833f3f1b87f5e 100644
--- a/drivers/infiniband/sw/rdmavt/vt.c
+++ b/drivers/infiniband/sw/rdmavt/vt.c
@@ -95,9 +95,7 @@ struct rvt_dev_info *rvt_alloc_device(size_t size, int nports)
 	if (!rdi)
 		return rdi;
 
-	rdi->ports = kcalloc(nports,
-			     sizeof(struct rvt_ibport **),
-			     GFP_KERNEL);
+	rdi->ports = kcalloc(nports, sizeof(*rdi->ports), GFP_KERNEL);
 	if (!rdi->ports)
 		ib_dealloc_device(&rdi->ibdev);
 
-- 
2.25.1