From: Sihang Chen <chensihang1@xxxxxxxxxxxxx>
Save the string address before pass to strsep, release it at end.
Because strsep will update the string address to point after the
token.
Fixes: c31dc9fe165d("crypto: hisilicon/qm - add DebugFS for xQC and...")
Signed-off-by: Sihang Chen <chensihang1@xxxxxxxxxxxxx>
Signed-off-by: Yang Shen <shenyang39@xxxxxxxxxx>
Reviewed-by: Zhou Wang <wangzhou1@xxxxxxxxxxxxx>
---
drivers/crypto/hisilicon/qm.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index 6527c53..fb389c0 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -1420,17 +1420,18 @@ static int qm_dbg_help(struct hisi_qm *qm, char *s)
static int qm_cmd_write_dump(struct hisi_qm *qm, const char *cmd_buf)
{
struct device *dev = &qm->pdev->dev;
- char *presult, *s;
+ char *presult, *s, *s_tmp;
int ret;
s = kstrdup(cmd_buf, GFP_KERNEL);
if (!s)
return -ENOMEM;
+ s_tmp = s;
presult = strsep(&s, " ");
if (!presult) {
- kfree(s);
- return -EINVAL;
+ ret = -EINVAL;
+ goto err_buffer_free;
}
if (!strcmp(presult, "sqc"))
@@ -1459,7 +1460,8 @@ static int qm_cmd_write_dump(struct hisi_qm *qm, const char *cmd_buf)
if (ret)
dev_info(dev, "Please echo help\n");
- kfree(s);
+err_buffer_free:
+ kfree(s_tmp);
return ret;
}
--
2.7.4
