lpfc: fix missing zero termination in debugfs

If you feed 32 bytes in then the kstrtoull() doesn't receive a terminated
string so will run off the end.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Orabug: 23762058
(cherry picked from commit 0872774d8a319676dea7416e0cf85bec63eea0d0)
Signed-off-by: Manjunath Govindashetty <manjunath.govindashetty@oracle.com>

diff --git a/drivers/scsi/lpfc/lpfc_debugfs.c b/drivers/scsi/lpfc/lpfc_debugfs.c
index 513edcb0c2dae3794b302282b62a730eeda0c6f5..a051a0c01232f9c193fc83d042fef0bee0ba399e 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_debugfs.c
+++ b/drivers/scsi/lpfc/lpfc_debugfs.c
@@ -1054,11 +1054,11 @@ lpfc_debugfs_dif_err_write(struct file *file, const char __user *buf,
 {
        struct dentry *dent = file->f_path.dentry;
        struct lpfc_hba *phba = file->private_data;
-       char dstbuf[32];
+       char dstbuf[33];
        uint64_t tmp = 0;
        int size;
 
-       memset(dstbuf, 0, 32);
+       memset(dstbuf, 0, 33);
        size = (nbytes < 32) ? nbytes : 32;
        if (copy_from_user(dstbuf, buf, size))
                return 0;