scsi: libfc: Free skb in fc_disc_gpn_id_resp() for valid cases

In fc_disc_gpn_id_resp(), skb is supposed to get freed in all cases except
for PTR_ERR. However, in some cases it didn't.

This fix is to call fc_frame_free(fp) before function returns.

Link: https://lore.kernel.org/r/20200729081824.30996-2-jhasan@marvell.com
Reviewed-by: Girish Basrur <gbasrur@marvell.com>
Reviewed-by: Santosh Vernekar <svernekar@marvell.com>
Reviewed-by: Saurav Kashyap <skashyap@marvell.com>
Reviewed-by: Shyam Sundar <ssundar@marvell.com>
Signed-off-by: Javed Hasan <jhasan@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/libfc/fc_disc.c b/drivers/scsi/libfc/fc_disc.c
index 19721db..d8cbc9c 100644 (file)
--- a/drivers/scsi/libfc/fc_disc.c
+++ b/drivers/scsi/libfc/fc_disc.c
@@ -581,8 +581,12 @@ static void fc_disc_gpn_id_resp(struct fc_seq *sp, struct fc_frame *fp,
 
        if (PTR_ERR(fp) == -FC_EX_CLOSED)
                goto out;
-       if (IS_ERR(fp))
-               goto redisc;
+       if (IS_ERR(fp)) {
+               mutex_lock(&disc->disc_mutex);
+               fc_disc_restart(disc);
+               mutex_unlock(&disc->disc_mutex);
+               goto out;
+       }
 
        cp = fc_frame_payload_get(fp, sizeof(*cp));
        if (!cp)
@@ -609,7 +613,7 @@ static void fc_disc_gpn_id_resp(struct fc_seq *sp, struct fc_frame *fp,
                                new_rdata->disc_id = disc->disc_id;
                                fc_rport_login(new_rdata);
                        }
-                       goto out;
+                       goto free_fp;
                }
                rdata->disc_id = disc->disc_id;
                mutex_unlock(&rdata->rp_mutex);
@@ -626,6 +630,8 @@ redisc:
                fc_disc_restart(disc);
                mutex_unlock(&disc->disc_mutex);
        }
+free_fp:
+       fc_frame_free(fp);
 out:
        kref_put(&rdata->kref, fc_rport_destroy);
        if (!IS_ERR(fp))