linux-kernel - [PATCH] scsi: mvumi: fix 32 bit shift of a u32 value

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20190813180113.14245-1-colin.king@canonical.com>
Date:   Tue, 13 Aug 2019 19:01:13 +0100
From:   Colin King <colin.king@...onical.com>
To:     Jianyun Li <jyli@...vell.com>,
        "James E . J . Bottomley" <jejb@...ux.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] scsi: mvumi: fix 32 bit shift of a u32 value

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

Currently the top 32 bits of a 64 bit address is being calculated
by shifting a u32 twice by 16 bits and then being cast into a 64
bit address.  Shifting a u32 twice by 16 bits always ends up with
a zero.  Fix this by casting the u32 to a 64 bit address first
and then shifting it 32 bits.

Addresses-Coverity: ("Operands don't affect result")
Fixes: f0c568a478f0 ("[SCSI] mvumi: Add Marvell UMI driver")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/scsi/mvumi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/mvumi.c b/drivers/scsi/mvumi.c
index 8906aceda4c4..62df69f1e71e 100644
--- a/drivers/scsi/mvumi.c
+++ b/drivers/scsi/mvumi.c
@@ -296,7 +296,7 @@ static void mvumi_delete_internal_cmd(struct mvumi_hba *mhba,
 			sgd_getsz(mhba, m_sg, size);
 
 			phy_addr = (dma_addr_t) m_sg->baseaddr_l |
-				(dma_addr_t) ((m_sg->baseaddr_h << 16) << 16);
+				   (dma_addr_t) m_sg->baseaddr_h << 32;
 
 			dma_free_coherent(&mhba->pdev->dev, size, cmd->data_buf,
 								phy_addr);
-- 
2.20.1