Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Fixes only in drivers (ufs, mvsas, qla2xxx, target) that came in just
  before or during the merge window.

  The most important one is the qla2xxx which reverts a conversion to
  fix flexible array member warnings, that went up in this merge window
  but which turned out on further testing to be causing data corruption"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: ufs: core: Include UTP error in INT_FATAL_ERRORS
  scsi: ufs: sysfs: Make HID attributes visible
  scsi: mvsas: Fix use-after-free bugs in mvs_work_queue
  scsi: ufs: core: Fix PM QoS mutex initialization
  scsi: ufs: core: Fix runtime suspend error deadlock
  Revert "scsi: qla2xxx: Fix memcpy() field-spanning write issue"
  scsi: target: target_core_configfs: Add length check to avoid buffer overflow

10 files changed, 36 insertions, 25 deletions

diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c
index 2c72da6b8cf0..7f1ad305eee6 100644
--- a/drivers/scsi/mvsas/mv_init.c
+++ b/drivers/scsi/mvsas/mv_init.c
@@ -124,7 +124,7 @@ static void mvs_free(struct mvs_info *mvi)
 	if (mvi->shost)
 		scsi_host_put(mvi->shost);
 	list_for_each_entry(mwq, &mvi->wq_list, entry)
-		cancel_delayed_work(&mwq->work_q);
+		cancel_delayed_work_sync(&mwq->work_q);
 	kfree(mvi->rsvd_tags);
 	kfree(mvi);
 }
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 604e66bead1e..cb95b7b12051 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -4890,7 +4890,9 @@ struct purex_item {
 			     struct purex_item *pkt);
 	atomic_t in_use;
 	uint16_t size;
-	uint8_t iocb[] __counted_by(size);
+	struct {
+		uint8_t iocb[64];
+	} iocb;
 };
 
 #include "qla_edif.h"
@@ -5099,6 +5101,7 @@ typedef struct scsi_qla_host {
 		struct list_head head;
 		spinlock_t lock;
 	} purex_list;
+	struct purex_item default_item;
 
 	struct name_list_extended gnl;
 	/* Count of active session/fcport */
@@ -5127,11 +5130,6 @@ typedef struct scsi_qla_host {
 #define DPORT_DIAG_IN_PROGRESS                 BIT_0
 #define DPORT_DIAG_CHIP_RESET_IN_PROGRESS      BIT_1
 	uint16_t dport_status;
-
-	/* Must be last --ends in a flexible-array member. */
-	TRAILING_OVERLAP(struct purex_item, default_item, iocb,
-		uint8_t __default_item_iocb[QLA_DEFAULT_PAYLOAD_SIZE];
-	);
 } scsi_qla_host_t;
 
 struct qla27xx_image_status {
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 4559b490614d..c4c6b5c6658c 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -1077,17 +1077,17 @@ static struct purex_item *
 qla24xx_alloc_purex_item(scsi_qla_host_t *vha, uint16_t size)
 {
 	struct purex_item *item = NULL;
+	uint8_t item_hdr_size = sizeof(*item);
 
 	if (size > QLA_DEFAULT_PAYLOAD_SIZE) {
-		item = kzalloc(struct_size(item, iocb, size), GFP_ATOMIC);
+		item = kzalloc(item_hdr_size +
+		    (size - QLA_DEFAULT_PAYLOAD_SIZE), GFP_ATOMIC);
 	} else {
 		if (atomic_inc_return(&vha->default_item.in_use) == 1) {
 			item = &vha->default_item;
 			goto initialize_purex_header;
 		} else {
-			item = kzalloc(
-				struct_size(item, iocb, QLA_DEFAULT_PAYLOAD_SIZE),
-				GFP_ATOMIC);
+			item = kzalloc(item_hdr_size, GFP_ATOMIC);
 		}
 	}
 	if (!item) {
@@ -1127,16 +1127,17 @@ qla24xx_queue_purex_item(scsi_qla_host_t *vha, struct purex_item *pkt,
  * @vha: SCSI driver HA context
  * @pkt: ELS packet
  */
-static struct purex_item *
-qla24xx_copy_std_pkt(struct scsi_qla_host *vha, void *pkt)
+static struct purex_item
+*qla24xx_copy_std_pkt(struct scsi_qla_host *vha, void *pkt)
 {
 	struct purex_item *item;
 
-	item = qla24xx_alloc_purex_item(vha, QLA_DEFAULT_PAYLOAD_SIZE);
+	item = qla24xx_alloc_purex_item(vha,
+					QLA_DEFAULT_PAYLOAD_SIZE);
 	if (!item)
 		return item;
 
-	memcpy(&item->iocb, pkt, QLA_DEFAULT_PAYLOAD_SIZE);
+	memcpy(&item->iocb, pkt, sizeof(item->iocb));
 	return item;
 }
 
diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
index 065f9bcca26f..316594aa40cc 100644
--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -1308,7 +1308,7 @@ void qla2xxx_process_purls_iocb(void **pkt, struct rsp_que **rsp)
 
 	ql_dbg(ql_dbg_unsol, vha, 0x2121,
 	       "PURLS OP[%01x] size %d xchg addr 0x%x portid %06x\n",
-	       item->iocb[3], item->size, uctx->exchange_address,
+	       item->iocb.iocb[3], item->size, uctx->exchange_address,
 	       fcport->d_id.b24);
 	/* +48    0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F
 	 * ----- -----------------------------------------------
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index cb56d2af6cfa..5ffd94586652 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -6459,10 +6459,9 @@ dealloc:
 void
 qla24xx_free_purex_item(struct purex_item *item)
 {
-	if (item == &item->vha->default_item) {
+	if (item == &item->vha->default_item)
 		memset(&item->vha->default_item, 0, sizeof(struct purex_item));
-		memset(&item->vha->__default_item_iocb, 0, QLA_DEFAULT_PAYLOAD_SIZE);
-	} else
+	else
 		kfree(item);
 }
 
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index 0904ecae253a..b19acd662726 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -2774,7 +2774,7 @@ static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
 			config_item_name(&dev->dev_group.cg_item));
 		cur_len++; /* Extra byte for NULL terminator */
 
-		if ((cur_len + len) > PAGE_SIZE) {
+		if ((cur_len + len) > PAGE_SIZE || cur_len > LU_GROUP_NAME_BUF) {
 			pr_warn("Ran out of lu_gp_show_attr"
 				"_members buffer\n");
 			break;
diff --git a/drivers/ufs/core/ufs-sysfs.c b/drivers/ufs/core/ufs-sysfs.c
index 0086816b27cd..c040afc6668e 100644
--- a/drivers/ufs/core/ufs-sysfs.c
+++ b/drivers/ufs/core/ufs-sysfs.c
@@ -1949,7 +1949,7 @@ static umode_t ufs_sysfs_hid_is_visible(struct kobject *kobj,
 	return	hba->dev_info.hid_sup ? attr->mode : 0;
 }
 
-static const struct attribute_group ufs_sysfs_hid_group = {
+const struct attribute_group ufs_sysfs_hid_group = {
 	.name = "hid",
 	.attrs = ufs_sysfs_hid,
 	.is_visible = ufs_sysfs_hid_is_visible,
diff --git a/drivers/ufs/core/ufs-sysfs.h b/drivers/ufs/core/ufs-sysfs.h
index 8d94af3b8077..6efb82a082fd 100644
--- a/drivers/ufs/core/ufs-sysfs.h
+++ b/drivers/ufs/core/ufs-sysfs.h
@@ -14,5 +14,6 @@ void ufs_sysfs_remove_nodes(struct device *dev);
 
 extern const struct attribute_group ufs_sysfs_unit_descriptor_group;
 extern const struct attribute_group ufs_sysfs_lun_attributes_group;
+extern const struct attribute_group ufs_sysfs_hid_group;
 
 #endif
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index d9632d7c5f01..8339fec975b9 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -6684,6 +6684,14 @@ static void ufshcd_err_handler(struct work_struct *work)
 	}
 	spin_unlock_irqrestore(hba->host->host_lock, flags);
 
+	ufshcd_rpm_get_noresume(hba);
+	if (hba->pm_op_in_progress) {
+		ufshcd_link_recovery(hba);
+		ufshcd_rpm_put(hba);
+		return;
+	}
+	ufshcd_rpm_put(hba);
+
 	ufshcd_err_handling_prepare(hba);
 
 	spin_lock_irqsave(hba->host->host_lock, flags);
@@ -8489,6 +8497,8 @@ static int ufs_get_device_desc(struct ufs_hba *hba)
 				DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP) &
 				UFS_DEV_HID_SUPPORT;
 
+	sysfs_update_group(&hba->dev->kobj, &ufs_sysfs_hid_group);
+
 	model_index = desc_buf[DEVICE_DESC_PARAM_PRDCT_NAME];
 
 	err = ufshcd_read_string_desc(hba, model_index,
@@ -10677,6 +10687,9 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
 	 */
 	spin_lock_init(&hba->clk_gating.lock);
 
+	/* Initialize mutex for PM QoS request synchronization */
+	mutex_init(&hba->pm_qos_mutex);
+
 	/*
 	 * Set the default power management level for runtime and system PM.
 	 * Host controller drivers can override them in their
@@ -10765,9 +10778,6 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
 
 	mutex_init(&hba->wb_mutex);
 
-	/* Initialize mutex for PM QoS request synchronization */
-	mutex_init(&hba->pm_qos_mutex);
-
 	init_rwsem(&hba->clk_scaling_lock);
 
 	ufshcd_init_clk_gating(hba);
diff --git a/include/ufs/ufshci.h b/include/ufs/ufshci.h
index 612500a7088f..e64b70132101 100644
--- a/include/ufs/ufshci.h
+++ b/include/ufs/ufshci.h
@@ -180,6 +180,7 @@ static inline u32 ufshci_version(u32 major, u32 minor)
 #define UTP_TASK_REQ_COMPL			0x200
 #define UIC_COMMAND_COMPL			0x400
 #define DEVICE_FATAL_ERROR			0x800
+#define UTP_ERROR				0x1000
 #define CONTROLLER_FATAL_ERROR			0x10000
 #define SYSTEM_BUS_FATAL_ERROR			0x20000
 #define CRYPTO_ENGINE_FATAL_ERROR		0x40000
@@ -199,7 +200,8 @@ static inline u32 ufshci_version(u32 major, u32 minor)
 				CONTROLLER_FATAL_ERROR |\
 				SYSTEM_BUS_FATAL_ERROR |\
 				CRYPTO_ENGINE_FATAL_ERROR |\
-				UIC_LINK_LOST)
+				UIC_LINK_LOST |\
+				UTP_ERROR)
 
 /* HCS - Host Controller Status 30h */
 #define DEVICE_PRESENT				0x1