linux-kernel - [PATCH 3/9] [SCSI] lpfc: Silence DEBUG_STRICT_USER_COPY

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

Date:	Thu, 12 May 2011 16:50:06 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	"James E.J. Bottomley" <James.Bottomley@...e.de>
Cc:	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	James Smart <james.smart@...lex.com>
Subject: [PATCH 3/9] [SCSI] lpfc: Silence DEBUG_STRICT_USER_COPY_CHECKS=y warning

Enabling DEBUG_STRICT_USER_COPY_CHECKS causes the following
warning:

In file included from arch/x86/include/asm/uaccess.h:573,
                 from include/linux/uaccess.h:5,
                 from include/linux/highmem.h:7,
                 from include/linux/pagemap.h:10,
                 from include/linux/blkdev.h:12,
                 from drivers/scsi/lpfc/lpfc_debugfs.c:21:
In function 'copy_from_user':
arch/x86/include/asm/uaccess_64.h:65:
warning: call to 'copy_from_user_overflow' declared with
attribute warning: copy_from_user() buffer size is not provably
correct

presumably due to buf_size being signed causing GCC to fail to
see that buf_size can't become negative.

Cc: James Smart <james.smart@...lex.com>
Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
---
 drivers/scsi/lpfc/lpfc_debugfs.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_debugfs.c b/drivers/scsi/lpfc/lpfc_debugfs.c
index 3d96774..0af53a6 100644
--- a/drivers/scsi/lpfc/lpfc_debugfs.c
+++ b/drivers/scsi/lpfc/lpfc_debugfs.c
@@ -1305,7 +1305,8 @@ static int lpfc_idiag_cmd_get(const char __user *buf, size_t nbytes,
 {
 	char mybuf[64];
 	char *pbuf, *step_str;
-	int bsize, i;
+	int i;
+	size_t bsize;
 
 	/* Protect copy from user */
 	if (!access_ok(VERIFY_READ, buf, nbytes))
-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/