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Subject[PATCH 3/9] [SCSI] lpfc: Silence DEBUG_STRICT_USER_COPY_CHECKS=y warning
Enabling DEBUG_STRICT_USER_COPY_CHECKS causes the following

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':
warning: call to 'copy_from_user_overflow' declared with
attribute warning: copy_from_user() buffer size is not provably

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

Cc: James Smart <>
Signed-off-by: Stephen Boyd <>
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.

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