linux-kernel - [GIT PULL] SCSI fixes for 6.0-rc1

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Date:   Fri, 21 Oct 2022 09:28:37 -0400
From:   James Bottomley <James.Bottomley@...senPartnership.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-scsi <linux-scsi@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: [GIT PULL] SCSI fixes for 6.0-rc1

Two small changes, one in the lpfc driver and the other in the core. 
The core change is an additional footgun guard which prevents users
from writing the wrong state to sysfs and causing a hang.

The patch is available here:

git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git scsi-fixes

The short changelog is:

Rafael Mendonca (1):
      scsi: lpfc: Fix memory leak in lpfc_create_port()

Uday Shankar (1):
      scsi: core: Restrict legal sdev_state transitions via sysfs

And the diffstat:

 drivers/scsi/lpfc/lpfc_init.c | 7 ++++---
 drivers/scsi/scsi_sysfs.c     | 8 ++++++++
 2 files changed, 12 insertions(+), 3 deletions(-)

With full diff below.

James

---

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index b49c39569386..b535f1fd3010 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -4812,7 +4812,7 @@ lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
 	rc = lpfc_vmid_res_alloc(phba, vport);
 
 	if (rc)
-		goto out;
+		goto out_put_shost;
 
 	/* Initialize all internally managed lists. */
 	INIT_LIST_HEAD(&vport->fc_nodes);
@@ -4830,16 +4830,17 @@ lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
 
 	error = scsi_add_host_with_dma(shost, dev, &phba->pcidev->dev);
 	if (error)
-		goto out_put_shost;
+		goto out_free_vmid;
 
 	spin_lock_irq(&phba->port_list_lock);
 	list_add_tail(&vport->listentry, &phba->port_list);
 	spin_unlock_irq(&phba->port_list_lock);
 	return vport;
 
-out_put_shost:
+out_free_vmid:
 	kfree(vport->vmid);
 	bitmap_free(vport->vmid_priority_range);
+out_put_shost:
 	scsi_host_put(shost);
 out:
 	return NULL;
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index c95177ca6ed2..cac7c902cf70 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -828,6 +828,14 @@ store_state_field(struct device *dev, struct device_attribute *attr,
 	}
 
 	mutex_lock(&sdev->state_mutex);
+	switch (sdev->sdev_state) {
+	case SDEV_RUNNING:
+	case SDEV_OFFLINE:
+		break;
+	default:
+		mutex_unlock(&sdev->state_mutex);
+		return -EINVAL;
+	}
 	if (sdev->sdev_state == SDEV_RUNNING && state == SDEV_RUNNING) {
 		ret = 0;
 	} else {