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Wed, 05 Feb 2025 21:25:30 -0800 (PST) Received: from newman.cs.purdue.edu ([128.10.127.250]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-47153beaacasm2285571cf.67.2025.02.05.21.25.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Feb 2025 21:25:29 -0800 (PST) From: Jiasheng Jiang To: markus.elfring@web.de Cc: GR-QLogic-Storage-Upstream@marvell.com, James.Bottomley@hansenpartnership.com, arun.easi@cavium.com, bvanassche@acm.org, jhasan@marvell.com, jiashengjiangcool@gmail.com, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, manish.rangankar@cavium.com, martin.petersen@oracle.com, nilesh.javali@cavium.com, skashyap@marvell.com, stable@vger.kernel.org Subject: [PATCH 2/2] scsi: qedf: Add check for bdt_info Date: Thu, 6 Feb 2025 05:25:23 +0000 Message-Id: <20250206052523.16683-3-jiashengjiangcool@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250206052523.16683-1-jiashengjiangcool@gmail.com> References: <20250206052523.16683-1-jiashengjiangcool@gmail.com> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add a check for "bdt_info". Otherwise, if one of the allocations for "cmgr->io_bdt_pool[i]" fails, "bdt_info->bd_tbl" will cause a NULL pointer dereference. Fixes: 61d8658b4a43 ("scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.") Cc: # v5.10+ Signed-off-by: Jiasheng Jiang --- drivers/scsi/qedf/qedf_io.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/qedf/qedf_io.c b/drivers/scsi/qedf/qedf_io.c index d52057b97a4f..1ed0ee4f8dde 100644 --- a/drivers/scsi/qedf/qedf_io.c +++ b/drivers/scsi/qedf/qedf_io.c @@ -125,7 +125,7 @@ void qedf_cmd_mgr_free(struct qedf_cmd_mgr *cmgr) bd_tbl_sz = QEDF_MAX_BDS_PER_CMD * sizeof(struct scsi_sge); for (i = 0; i < num_ios; i++) { bdt_info = cmgr->io_bdt_pool[i]; - if (bdt_info->bd_tbl) { + if (bdt_info && bdt_info->bd_tbl) { dma_free_coherent(&qedf->pdev->dev, bd_tbl_sz, bdt_info->bd_tbl, bdt_info->bd_tbl_dma); bdt_info->bd_tbl = NULL;