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scsi: qedf: remove memset/memcpy to nfunc and use func instead 

Currently the qedf_dbg_* family of functions can overrun the end of the
source string if it is less than the destination buffer length because of
the use of a fixed sized memcpy. Remove the memset/memcpy calls to nfunc
and just use func instead as it is always a null terminated string.

Addresses-Coverity: ("Out-of-bounds access")
Fixes: 61d8658b4a ("scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Colin Ian King 2019-04-12 10:48:29 +01:00 committed by Martin K. Petersen
parent 948e922fc4
commit 65b1dc9900
1 changed files with 8 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/scsi/qedf/qedf_dbg.c
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@ -15,10 +15,6 @@ qedf_dbg_err(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
{
va_list va;
struct va_format vaf;
char nfunc[32];
memset(nfunc, 0, sizeof(nfunc));
memcpy(nfunc, func, sizeof(nfunc) - 1);
va_start(va, fmt);
@ -27,9 +23,9 @@ qedf_dbg_err(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
if (likely(qedf) && likely(qedf->pdev))
pr_err("[%s]:[%s:%d]:%d: %pV", dev_name(&(qedf->pdev->dev)),
nfunc, line, qedf->host_no, &vaf);
func, line, qedf->host_no, &vaf);
else
pr_err("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
pr_err("[0000:00:00.0]:[%s:%d]: %pV", func, line, &vaf);
va_end(va);
}
@ -40,10 +36,6 @@ qedf_dbg_warn(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
{
va_list va;
struct va_format vaf;
char nfunc[32];
memset(nfunc, 0, sizeof(nfunc));
memcpy(nfunc, func, sizeof(nfunc) - 1);
va_start(va, fmt);
@ -55,9 +47,9 @@ qedf_dbg_warn(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
if (likely(qedf) && likely(qedf->pdev))
pr_warn("[%s]:[%s:%d]:%d: %pV", dev_name(&(qedf->pdev->dev)),
nfunc, line, qedf->host_no, &vaf);
func, line, qedf->host_no, &vaf);
else
pr_warn("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
pr_warn("[0000:00:00.0]:[%s:%d]: %pV", func, line, &vaf);
ret:
va_end(va);
@ -69,10 +61,6 @@ qedf_dbg_notice(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
{
va_list va;
struct va_format vaf;
char nfunc[32];
memset(nfunc, 0, sizeof(nfunc));
memcpy(nfunc, func, sizeof(nfunc) - 1);
va_start(va, fmt);
@ -84,10 +72,10 @@ qedf_dbg_notice(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
if (likely(qedf) && likely(qedf->pdev))
pr_notice("[%s]:[%s:%d]:%d: %pV",
dev_name(&(qedf->pdev->dev)), nfunc, line,
dev_name(&(qedf->pdev->dev)), func, line,
qedf->host_no, &vaf);
else
pr_notice("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
pr_notice("[0000:00:00.0]:[%s:%d]: %pV", func, line, &vaf);
ret:
va_end(va);
@ -99,10 +87,6 @@ qedf_dbg_info(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
{
va_list va;
struct va_format vaf;
char nfunc[32];
memset(nfunc, 0, sizeof(nfunc));
memcpy(nfunc, func, sizeof(nfunc) - 1);
va_start(va, fmt);
@ -114,9 +98,9 @@ qedf_dbg_info(struct qedf_dbg_ctx *qedf, const char *func, u32 line,
if (likely(qedf) && likely(qedf->pdev))
pr_info("[%s]:[%s:%d]:%d: %pV", dev_name(&(qedf->pdev->dev)),
nfunc, line, qedf->host_no, &vaf);
func, line, qedf->host_no, &vaf);
else
pr_info("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
pr_info("[0000:00:00.0]:[%s:%d]: %pV", func, line, &vaf);
ret:
va_end(va);