[PATCH 5.12 036/384] scsi: lpfc: Fix rmmod crash due to bad ring pointers to abort_iotag
From: Greg Kroah-Hartman
Date: Mon May 10 2021 - 08:05:22 EST
From: James Smart <jsmart2021@xxxxxxxxx>
commit 078c68b87a717b9fcd8e0f2109f73456fbc55490 upstream.
Rmmod on SLI-4 adapters is sometimes hitting a bad ptr dereference in
lpfc_els_free_iocb().
A prior patch refactored the lpfc_sli_abort_iocb() routine. One of the
changes was to convert from building/sending an abort within the routine to
using a common routine. The reworked routine passes, without modification,
the pring ptr to the new common routine. The older routine had logic to
check SLI-3 vs SLI-4 and adapt the pring ptr if necessary as callers were
passing SLI-3 pointers even when not on an SLI-4 adapter. The new routine
is missing this check and adapt, so the SLI-3 ring pointers are being used
in SLI-4 paths.
Fix by cleaning up the calling routines. In review, there is no need to
pass the ring ptr argument to abort_iocb at all. The routine can look at
the adapter type itself and reference the proper ring.
Link: https://lore.kernel.org/r/20210412013127.2387-2-jsmart2021@xxxxxxxxx
Fixes: db7531d2b377 ("scsi: lpfc: Convert abort handling to SLI-3 and SLI-4 handlers")
Cc: <stable@xxxxxxxxxxxxxxx> # v5.11+
Co-developed-by: Justin Tee <justin.tee@xxxxxxxxxxxx>
Signed-off-by: Justin Tee <justin.tee@xxxxxxxxxxxx>
Signed-off-by: James Smart <jsmart2021@xxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/lpfc/lpfc_crtn.h | 4 ++--
drivers/scsi/lpfc/lpfc_hbadisc.c | 10 +++-------
drivers/scsi/lpfc/lpfc_nportdisc.c | 4 +---
drivers/scsi/lpfc/lpfc_sli.c | 20 +++++++++++++++-----
4 files changed, 21 insertions(+), 17 deletions(-)
--- a/drivers/scsi/lpfc/lpfc_crtn.h
+++ b/drivers/scsi/lpfc/lpfc_crtn.h
@@ -351,8 +351,8 @@ int lpfc_sli_hbq_size(void);
int lpfc_sli_issue_abort_iotag(struct lpfc_hba *, struct lpfc_sli_ring *,
struct lpfc_iocbq *, void *);
int lpfc_sli_sum_iocb(struct lpfc_vport *, uint16_t, uint64_t, lpfc_ctx_cmd);
-int lpfc_sli_abort_iocb(struct lpfc_vport *, struct lpfc_sli_ring *, uint16_t,
- uint64_t, lpfc_ctx_cmd);
+int lpfc_sli_abort_iocb(struct lpfc_vport *vport, u16 tgt_id, u64 lun_id,
+ lpfc_ctx_cmd abort_cmd);
int
lpfc_sli_abort_taskmgmt(struct lpfc_vport *, struct lpfc_sli_ring *,
uint16_t, uint64_t, lpfc_ctx_cmd);
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -140,11 +140,8 @@ lpfc_terminate_rport_io(struct fc_rport
"rport terminate: sid:x%x did:x%x flg:x%x",
ndlp->nlp_sid, ndlp->nlp_DID, ndlp->nlp_flag);
- if (ndlp->nlp_sid != NLP_NO_SID) {
- lpfc_sli_abort_iocb(vport,
- &vport->phba->sli.sli3_ring[LPFC_FCP_RING],
- ndlp->nlp_sid, 0, LPFC_CTX_TGT);
- }
+ if (ndlp->nlp_sid != NLP_NO_SID)
+ lpfc_sli_abort_iocb(vport, ndlp->nlp_sid, 0, LPFC_CTX_TGT);
}
/*
@@ -299,8 +296,7 @@ lpfc_dev_loss_tmo_handler(struct lpfc_no
if (ndlp->nlp_sid != NLP_NO_SID) {
warn_on = 1;
- lpfc_sli_abort_iocb(vport, &phba->sli.sli3_ring[LPFC_FCP_RING],
- ndlp->nlp_sid, 0, LPFC_CTX_TGT);
+ lpfc_sli_abort_iocb(vport, ndlp->nlp_sid, 0, LPFC_CTX_TGT);
}
if (warn_on) {
--- a/drivers/scsi/lpfc/lpfc_nportdisc.c
+++ b/drivers/scsi/lpfc/lpfc_nportdisc.c
@@ -2633,12 +2633,10 @@ static uint32_t
lpfc_rcv_prlo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
void *arg, uint32_t evt)
{
- struct lpfc_hba *phba = vport->phba;
struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
/* flush the target */
- lpfc_sli_abort_iocb(vport, &phba->sli.sli3_ring[LPFC_FCP_RING],
- ndlp->nlp_sid, 0, LPFC_CTX_TGT);
+ lpfc_sli_abort_iocb(vport, ndlp->nlp_sid, 0, LPFC_CTX_TGT);
/* Treat like rcv logo */
lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -11647,7 +11647,7 @@ lpfc_sli_issue_abort_iotag(struct lpfc_h
icmd = &cmdiocb->iocb;
if (icmd->ulpCommand == CMD_ABORT_XRI_CN ||
icmd->ulpCommand == CMD_CLOSE_XRI_CN ||
- (cmdiocb->iocb_flag & LPFC_DRIVER_ABORTED) != 0)
+ cmdiocb->iocb_flag & LPFC_DRIVER_ABORTED)
return IOCB_ABORTING;
if (!pring) {
@@ -11945,7 +11945,6 @@ lpfc_sli_abort_fcp_cmpl(struct lpfc_hba
/**
* lpfc_sli_abort_iocb - issue abort for all commands on a host/target/LUN
* @vport: Pointer to virtual port.
- * @pring: Pointer to driver SLI ring object.
* @tgt_id: SCSI ID of the target.
* @lun_id: LUN ID of the scsi device.
* @abort_cmd: LPFC_CTX_LUN/LPFC_CTX_TGT/LPFC_CTX_HOST.
@@ -11960,18 +11959,22 @@ lpfc_sli_abort_fcp_cmpl(struct lpfc_hba
* FCP iocbs associated with SCSI target specified by tgt_id parameter.
* When abort_cmd == LPFC_CTX_HOST, the function sends abort to all
* FCP iocbs associated with virtual port.
+ * The pring used for SLI3 is sli3_ring[LPFC_FCP_RING], for SLI4
+ * lpfc_sli4_calc_ring is used.
* This function returns number of iocbs it failed to abort.
* This function is called with no locks held.
**/
int
-lpfc_sli_abort_iocb(struct lpfc_vport *vport, struct lpfc_sli_ring *pring,
- uint16_t tgt_id, uint64_t lun_id, lpfc_ctx_cmd abort_cmd)
+lpfc_sli_abort_iocb(struct lpfc_vport *vport, u16 tgt_id, u64 lun_id,
+ lpfc_ctx_cmd abort_cmd)
{
struct lpfc_hba *phba = vport->phba;
+ struct lpfc_sli_ring *pring = NULL;
struct lpfc_iocbq *iocbq;
int errcnt = 0, ret_val = 0;
unsigned long iflags;
int i;
+ void *fcp_cmpl = NULL;
/* all I/Os are in process of being flushed */
if (phba->hba_flag & HBA_IOQ_FLUSH)
@@ -11985,8 +11988,15 @@ lpfc_sli_abort_iocb(struct lpfc_vport *v
continue;
spin_lock_irqsave(&phba->hbalock, iflags);
+ if (phba->sli_rev == LPFC_SLI_REV3) {
+ pring = &phba->sli.sli3_ring[LPFC_FCP_RING];
+ fcp_cmpl = lpfc_sli_abort_fcp_cmpl;
+ } else if (phba->sli_rev == LPFC_SLI_REV4) {
+ pring = lpfc_sli4_calc_ring(phba, iocbq);
+ fcp_cmpl = lpfc_sli4_abort_fcp_cmpl;
+ }
ret_val = lpfc_sli_issue_abort_iotag(phba, pring, iocbq,
- lpfc_sli_abort_fcp_cmpl);
+ fcp_cmpl);
spin_unlock_irqrestore(&phba->hbalock, iflags);
if (ret_val != IOCB_SUCCESS)
errcnt++;