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From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
To: james.bottomley@hansenpartnership.com
Cc: stephenmcameron@gmail.com, mikem@beardog.cce.hp.com,
	thenzl@redhat.com, linux-scsi@vger.kernel.org, scott.teel@hp.com
Subject: [PATCH 05/10] hpsa: fix memory leak in CCISS_BIG_PASSTHRU ioctl
Date: Mon, 23 Sep 2013 13:33:51 -0500	[thread overview]
Message-ID: <20130923183351.19995.32440.stgit@beardog.cce.hp.com> (raw)
In-Reply-To: <20130923183128.19995.7669.stgit@beardog.cce.hp.com>

From: Stephen M. Cameron <scameron@beardog.cce.hp.com>

We were leaking a command buffer if a DMA mapping error was
encountered in the CCISS_BIG_PASSTHRU ioctl.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
---
 drivers/scsi/hpsa.c |   11 +++++------
 1 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 411aef2..f2ef778 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -3170,7 +3170,7 @@ static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
 				hpsa_pci_unmap(h->pdev, c, i,
 					PCI_DMA_BIDIRECTIONAL);
 				status = -ENOMEM;
-				goto cleanup1;
+				goto cleanup0;
 			}
 			c->SG[i].Addr.lower = temp64.val32.lower;
 			c->SG[i].Addr.upper = temp64.val32.upper;
@@ -3186,24 +3186,23 @@ static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
 	/* Copy the error information out */
 	memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
 	if (copy_to_user(argp, ioc, sizeof(*ioc))) {
-		cmd_special_free(h, c);
 		status = -EFAULT;
-		goto cleanup1;
+		goto cleanup0;
 	}
 	if (ioc->Request.Type.Direction == XFER_READ && ioc->buf_size > 0) {
 		/* Copy the data out of the buffer we created */
 		BYTE __user *ptr = ioc->buf;
 		for (i = 0; i < sg_used; i++) {
 			if (copy_to_user(ptr, buff[i], buff_size[i])) {
-				cmd_special_free(h, c);
 				status = -EFAULT;
-				goto cleanup1;
+				goto cleanup0;
 			}
 			ptr += buff_size[i];
 		}
 	}
-	cmd_special_free(h, c);
 	status = 0;
+cleanup0:
+	cmd_special_free(h, c);
 cleanup1:
 	if (buff) {
 		for (i = 0; i < sg_used; i++)


  parent reply	other threads:[~2013-09-23 18:33 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-09-23 18:33 [PATCH 00/10] hpsa: September 2013 driver fixes Stephen M. Cameron
2013-09-23 18:33 ` [PATCH 01/10] hpsa: do not attempt to flush the cache on locked up controllers Stephen M. Cameron
2013-09-23 18:33 ` [PATCH 02/10] hpsa: add 5 second delay after doorbell reset Stephen M. Cameron
2013-09-23 18:33 ` [PATCH 03/10] hpsa: do not discard scsi status on aborted commands Stephen M. Cameron
2013-09-23 18:33 ` [PATCH 04/10] hpsa: remove unneeded include of seq_file.h Stephen M. Cameron
2013-09-23 18:33 ` Stephen M. Cameron [this message]
2013-09-23 18:33 ` [PATCH 06/10] hpsa: add MSA 2040 to list of external target devices Stephen M. Cameron
2013-09-23 18:34 ` [PATCH 07/10] hpsa: hide logical drives with format in progress from linux Stephen M. Cameron
2013-09-27 13:22   ` Tomas Henzl
2013-09-27 13:34     ` scameron
2013-09-27 14:01       ` Tomas Henzl
2013-09-27 14:41         ` scameron
2013-09-27 14:58           ` Tomas Henzl
2013-09-30 21:18             ` scameron
2013-09-27 16:54           ` Douglas Gilbert
2013-09-27 17:41             ` scameron
2013-10-10 16:25       ` scameron
2013-09-27 19:11     ` scameron
2013-09-23 18:34 ` [PATCH 08/10] hpsa: bring logical drives online when format completes Stephen M. Cameron
2013-09-23 18:34 ` [PATCH 09/10] hpsa: cap CCISS_PASSTHRU at 20 concurrent commands Stephen M. Cameron
2013-09-23 18:34 ` [PATCH 10/10] hpsa: prevent stalled i/o Stephen M. Cameron

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