linux-kernel - [PATCH 039/106] [SCSI] Fix incorrect memset in bnx2fc_parse_fcp

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Date:	Tue, 30 Jul 2013 10:30:58 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Andi Kleen <ak@...ux.intel.com>,
	James Bottomley <JBottomley@...allels.com>,
	Ben Hutchings <ben@...adent.org.uk>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 039/106] [SCSI] Fix incorrect memset in bnx2fc_parse_fcp_rsp

3.5.7.18 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Andi Kleen <andi@...stfloor.org>

commit 16da05b1158d1bcb31656e636a8736a663b1cf1f upstream.

gcc 4.8 warns because the memset only clears sizeof(char *) bytes, not
the whole buffer. Use the correct buffer size and clear the whole sense
buffer.

/backup/lsrc/git/linux-lto-2.6/drivers/scsi/bnx2fc/bnx2fc_io.c: In
function 'bnx2fc_parse_fcp_rsp':
/backup/lsrc/git/linux-lto-2.6/drivers/scsi/bnx2fc/bnx2fc_io.c:1810:41:
warning: argument to 'sizeof' in 'memset' call is the same expression as
the destination; did you mean to provide an explicit length?
[-Wsizeof-pointer-memaccess]
   memset(sc_cmd->sense_buffer, 0, sizeof(sc_cmd->sense_buffer));
                                         ^

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
Acked-by: Bhanu Prakash Gollapudi <bprakash@...adcom.com>
Signed-off-by: James Bottomley <JBottomley@...allels.com>
Cc: Ben Hutchings <ben@...adent.org.uk>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/scsi/bnx2fc/bnx2fc_io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/bnx2fc/bnx2fc_io.c b/drivers/scsi/bnx2fc/bnx2fc_io.c
index 4f7453b..557cfd3 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_io.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_io.c
@@ -1814,7 +1814,7 @@ static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
 			fcp_sns_len = SCSI_SENSE_BUFFERSIZE;
 		}
 
-		memset(sc_cmd->sense_buffer, 0, sizeof(sc_cmd->sense_buffer));
+		memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
 		if (fcp_sns_len)
 			memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len);
 
-- 
1.8.3.2

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