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scsi: libsas: Drop SAS_TASK_AT_INITIATOR

Browse source 
This flag is now only ever set, so delete it.

This also avoids a use-after-free in the pm8001 queue path, as reported in
the following:

https://lore.kernel.org/linux-scsi/c3cb7228-254e-9584-182b-007ac5e6fe0a@huawei.com/T/#m28c94c6d3ff582ec4a9fa54819180740e8bd4cfb

https://lore.kernel.org/linux-scsi/0cc0c435-b4f2-9c76-258d-865ba50a29dd@huawei.com/

[mkp: checkpatch + two SAS_TASK_AT_INITIATOR references]

Link: https://lore.kernel.org/r/1644489804-85730-3-git-send-email-john.garry@huawei.com
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
John Garry 2022-02-10 18:43:24 +08:00 committed by Martin K. Petersen
parent c39d5aa457
commit 26fc0ea74f
12 changed files with 9 additions and 55 deletions
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9
drivers/scsi/aic94xx/aic94xx_task.c
View file

@ -322,7 +322,6 @@ static void asd_task_tasklet_complete(struct asd_ascb *ascb,
spin_lock_irqsave(&task->task_state_lock, flags);
task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
task->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) {
struct completion *completion = ascb->completion;
@ -532,7 +531,6 @@ int asd_execute_task(struct sas_task *task, gfp_t gfp_flags)
struct sas_task *t = task;
struct asd_ascb *ascb = NULL, *a;
struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
unsigned long flags;
res = asd_can_queue(asd_ha, 1);
if (res)
@ -575,10 +573,6 @@ int asd_execute_task(struct sas_task *task, gfp_t gfp_flags)
}
if (res)
goto out_err_unmap;
spin_lock_irqsave(&t->task_state_lock, flags);
t->task_state_flags |= SAS_TASK_AT_INITIATOR;
spin_unlock_irqrestore(&t->task_state_lock, flags);
}
list_del_init(&alist);
@ -597,9 +591,6 @@ int asd_execute_task(struct sas_task *task, gfp_t gfp_flags)
if (a == b)
break;
t = a->uldd_task;
spin_lock_irqsave(&t->task_state_lock, flags);
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
spin_unlock_irqrestore(&t->task_state_lock, flags);
switch (t->task_proto) {
case SAS_PROTOCOL_SATA:
case SAS_PROTOCOL_STP:

8
drivers/scsi/hisi_sas/hisi_sas_main.c
View file

@ -406,7 +406,6 @@ void hisi_sas_task_deliver(struct hisi_hba *hisi_hba,
struct hisi_sas_cmd_hdr *cmd_hdr_base;
int dlvry_queue_slot, dlvry_queue;
struct sas_task *task = slot->task;
unsigned long flags;
int wr_q_index;
spin_lock(&dq->lock);
@ -460,10 +459,6 @@ void hisi_sas_task_deliver(struct hisi_hba *hisi_hba,
break;
}
spin_lock_irqsave(&task->task_state_lock, flags);
task->task_state_flags |= SAS_TASK_AT_INITIATOR;
spin_unlock_irqrestore(&task->task_state_lock, flags);
WRITE_ONCE(slot->ready, 1);
spin_lock(&dq->lock);
@ -1038,8 +1033,7 @@ static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task
ts->resp = SAS_TASK_COMPLETE;
ts->stat = SAS_ABORTED_TASK;
spin_lock_irqsave(&task->task_state_lock, flags);
task->task_state_flags &=
~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
task->task_state_flags |= SAS_TASK_STATE_DONE;
spin_unlock_irqrestore(&task->task_state_lock, flags);

3
drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
View file

@ -1200,8 +1200,7 @@ static void slot_complete_v1_hw(struct hisi_hba *hisi_hba,
sas_dev = device->lldd_dev;
spin_lock_irqsave(&task->task_state_lock, flags);
task->task_state_flags &=
~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
task->task_state_flags |= SAS_TASK_STATE_DONE;
spin_unlock_irqrestore(&task->task_state_lock, flags);

3
drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
View file

@ -2344,8 +2344,7 @@ static void slot_complete_v2_hw(struct hisi_hba *hisi_hba,
sas_dev = device->lldd_dev;
spin_lock_irqsave(&task->task_state_lock, flags);
task->task_state_flags &=
~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
spin_unlock_irqrestore(&task->task_state_lock, flags);
memset(ts, 0, sizeof(*ts));

3
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
View file

@ -2217,8 +2217,7 @@ static void slot_complete_v3_hw(struct hisi_hba *hisi_hba,
sas_dev = device->lldd_dev;
spin_lock_irqsave(&task->task_state_lock, flags);
task->task_state_flags &=
~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
spin_unlock_irqrestore(&task->task_state_lock, flags);
memset(ts, 0, sizeof(*ts));

3
drivers/scsi/isci/request.c
View file

@ -2934,8 +2934,7 @@ static void isci_request_io_request_complete(struct isci_host *ihost,
if (test_bit(IREQ_COMPLETE_IN_TARGET, &request->flags)) {
/* Normal notification (task_done) */
task->task_state_flags |= SAS_TASK_STATE_DONE;
task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR |
SAS_TASK_STATE_PENDING);
task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
}
spin_unlock_irqrestore(&task->task_state_lock, task_flags);

10
drivers/scsi/isci/task.c
View file

@ -91,8 +91,7 @@ static void isci_task_refuse(struct isci_host *ihost, struct sas_task *task,
/* Normal notification (task_done) */
task->task_state_flags |= SAS_TASK_STATE_DONE;
task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR |
SAS_TASK_STATE_PENDING);
task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
task->lldd_task = NULL;
spin_unlock_irqrestore(&task->task_state_lock, flags);
@ -164,7 +163,6 @@ int isci_task_execute_task(struct sas_task *task, gfp_t gfp_flags)
} else {
struct isci_request *ireq;
task->task_state_flags |= SAS_TASK_AT_INITIATOR;
/* do common allocation and init of request object. */
ireq = isci_io_request_from_tag(ihost, task, tag);
spin_unlock_irqrestore(&task->task_state_lock, flags);
@ -531,8 +529,7 @@ int isci_task_abort_task(struct sas_task *task)
*/
spin_lock_irqsave(&task->task_state_lock, flags);
task->task_state_flags |= SAS_TASK_STATE_DONE;
task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR |
SAS_TASK_STATE_PENDING);
task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
spin_unlock_irqrestore(&task->task_state_lock, flags);
ret = TMF_RESP_FUNC_COMPLETE;
@ -580,8 +577,7 @@ int isci_task_abort_task(struct sas_task *task)
test_bit(IDEV_GONE, &idev->flags));
spin_lock_irqsave(&task->task_state_lock, flags);
task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR |
SAS_TASK_STATE_PENDING);
task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
task->task_state_flags |= SAS_TASK_STATE_DONE;
spin_unlock_irqrestore(&task->task_state_lock, flags);

6
drivers/scsi/mvsas/mv_sas.c
View file

@ -815,9 +815,6 @@ static int mvs_task_prep(struct sas_task *task, struct mvs_info *mvi, int is_tmf
slot->port = tei.port;
task->lldd_task = slot;
list_add_tail(&slot->entry, &tei.port->list);
spin_lock(&task->task_state_lock);
task->task_state_flags |= SAS_TASK_AT_INITIATOR;
spin_unlock(&task->task_state_lock);
mvi_dev->running_req++;
++(*pass);
@ -1721,8 +1718,7 @@ int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
mvi_dev = dev->lldd_dev;
spin_lock(&task->task_state_lock);
task->task_state_flags &=
~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
task->task_state_flags |= SAS_TASK_STATE_DONE;
/* race condition*/
aborted = task->task_state_flags & SAS_TASK_STATE_ABORTED;

8
drivers/scsi/pm8001/pm8001_hwi.c
View file

@ -1561,7 +1561,6 @@ void pm8001_work_fn(struct work_struct *work)
atomic_dec(&pm8001_dev->running_req);
spin_lock_irqsave(&t->task_state_lock, flags1);
t->task_state_flags &= ~SAS_TASK_STATE_PENDING;
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
t->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((t->task_state_flags & SAS_TASK_STATE_ABORTED))) {
spin_unlock_irqrestore(&t->task_state_lock, flags1);
@ -2105,7 +2104,6 @@ mpi_ssp_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
psspPayload->ssp_resp_iu.status);
spin_lock_irqsave(&t->task_state_lock, flags);
t->task_state_flags &= ~SAS_TASK_STATE_PENDING;
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
t->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((t->task_state_flags & SAS_TASK_STATE_ABORTED))) {
spin_unlock_irqrestore(&t->task_state_lock, flags);
@ -2273,7 +2271,6 @@ static void mpi_ssp_event(struct pm8001_hba_info *pm8001_ha, void *piomb)
}
spin_lock_irqsave(&t->task_state_lock, flags);
t->task_state_flags &= ~SAS_TASK_STATE_PENDING;
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
t->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((t->task_state_flags & SAS_TASK_STATE_ABORTED))) {
spin_unlock_irqrestore(&t->task_state_lock, flags);
@ -2665,7 +2662,6 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
}
spin_lock_irqsave(&t->task_state_lock, flags);
t->task_state_flags &= ~SAS_TASK_STATE_PENDING;
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
t->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((t->task_state_flags & SAS_TASK_STATE_ABORTED))) {
spin_unlock_irqrestore(&t->task_state_lock, flags);
@ -2855,7 +2851,6 @@ static void mpi_sata_event(struct pm8001_hba_info *pm8001_ha, void *piomb)
}
spin_lock_irqsave(&t->task_state_lock, flags);
t->task_state_flags &= ~SAS_TASK_STATE_PENDING;
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
t->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((t->task_state_flags & SAS_TASK_STATE_ABORTED))) {
spin_unlock_irqrestore(&t->task_state_lock, flags);
@ -3040,7 +3035,6 @@ mpi_smp_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
}
spin_lock_irqsave(&t->task_state_lock, flags);
t->task_state_flags &= ~SAS_TASK_STATE_PENDING;
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
t->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((t->task_state_flags & SAS_TASK_STATE_ABORTED))) {
spin_unlock_irqrestore(&t->task_state_lock, flags);
@ -3714,7 +3708,6 @@ int pm8001_mpi_task_abort_resp(struct pm8001_hba_info *pm8001_ha, void *piomb)
}
spin_lock_irqsave(&t->task_state_lock, flags);
t->task_state_flags &= ~SAS_TASK_STATE_PENDING;
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
t->task_state_flags |= SAS_TASK_STATE_DONE;
spin_unlock_irqrestore(&t->task_state_lock, flags);
pm8001_ccb_task_free(pm8001_ha, t, ccb, tag);
@ -4354,7 +4347,6 @@ static int pm8001_chip_sata_req(struct pm8001_hba_info *pm8001_ha,
ts->resp = SAS_TASK_COMPLETE;
ts->stat = SAS_SAM_STAT_GOOD;
task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
task->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((task->task_state_flags &
SAS_TASK_STATE_ABORTED))) {

4
drivers/scsi/pm8001/pm8001_sas.c
View file

@ -487,9 +487,6 @@ static int pm8001_task_exec(struct sas_task *task,
goto err_out_tag;
}
/* TODO: select normal or high priority */
spin_lock(&t->task_state_lock);
t->task_state_flags |= SAS_TASK_AT_INITIATOR;
spin_unlock(&t->task_state_lock);
} while (0);
rc = 0;
goto out_done;
@ -978,7 +975,6 @@ void pm8001_open_reject_retry(
atomic_dec(&pm8001_dev->running_req);
spin_lock_irqsave(&task->task_state_lock, flags1);
task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
task->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((task->task_state_flags
& SAS_TASK_STATE_ABORTED))) {

6
drivers/scsi/pm8001/pm80xx_hwi.c
View file

@ -2178,7 +2178,6 @@ mpi_ssp_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
psspPayload->ssp_resp_iu.status);
spin_lock_irqsave(&t->task_state_lock, flags);
t->task_state_flags &= ~SAS_TASK_STATE_PENDING;
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
t->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((t->task_state_flags & SAS_TASK_STATE_ABORTED))) {
spin_unlock_irqrestore(&t->task_state_lock, flags);
@ -2362,7 +2361,6 @@ static void mpi_ssp_event(struct pm8001_hba_info *pm8001_ha, void *piomb)
}
spin_lock_irqsave(&t->task_state_lock, flags);
t->task_state_flags &= ~SAS_TASK_STATE_PENDING;
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
t->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((t->task_state_flags & SAS_TASK_STATE_ABORTED))) {
spin_unlock_irqrestore(&t->task_state_lock, flags);
@ -2787,7 +2785,6 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha,
}
spin_lock_irqsave(&t->task_state_lock, flags);
t->task_state_flags &= ~SAS_TASK_STATE_PENDING;
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
t->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((t->task_state_flags & SAS_TASK_STATE_ABORTED))) {
spin_unlock_irqrestore(&t->task_state_lock, flags);
@ -3010,7 +3007,6 @@ static void mpi_sata_event(struct pm8001_hba_info *pm8001_ha,
}
spin_lock_irqsave(&t->task_state_lock, flags);
t->task_state_flags &= ~SAS_TASK_STATE_PENDING;
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
t->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((t->task_state_flags & SAS_TASK_STATE_ABORTED))) {
spin_unlock_irqrestore(&t->task_state_lock, flags);
@ -3225,7 +3221,6 @@ mpi_smp_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
}
spin_lock_irqsave(&t->task_state_lock, flags);
t->task_state_flags &= ~SAS_TASK_STATE_PENDING;
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
t->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((t->task_state_flags & SAS_TASK_STATE_ABORTED))) {
spin_unlock_irqrestore(&t->task_state_lock, flags);
@ -4735,7 +4730,6 @@ static int pm80xx_chip_sata_req(struct pm8001_hba_info *pm8001_ha,
ts->resp = SAS_TASK_COMPLETE;
ts->stat = SAS_SAM_STAT_GOOD;
task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
task->task_state_flags |= SAS_TASK_STATE_DONE;
if (unlikely((task->task_state_flags &
SAS_TASK_STATE_ABORTED))) {

1
include/scsi/libsas.h
View file

@ -617,7 +617,6 @@ struct sas_task_slow {
#define SAS_TASK_STATE_DONE 2
#define SAS_TASK_STATE_ABORTED 4
#define SAS_TASK_NEED_DEV_RESET 8
#define SAS_TASK_AT_INITIATOR 16
extern struct sas_task *sas_alloc_task(gfp_t flags);
extern struct sas_task *sas_alloc_slow_task(gfp_t flags);