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scsi: lpfc: Fix rmmod crash due to bad ring pointers to abort_iotag

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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@gmail.com
Fixes: db7531d2b3 ("scsi: lpfc: Convert abort handling to SLI-3 and SLI-4 handlers")
Cc: <stable@vger.kernel.org> # v5.11+
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2021-04-11 18:31:12 -07:00 committed by Martin K. Petersen
parent 8350e19658
commit 078c68b87a
4 changed files with 21 additions and 17 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/scsi/lpfc/lpfc_crtn.h
View file

@ -353,8 +353,8 @@ 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);

10
drivers/scsi/lpfc/lpfc_hbadisc.c
View file

@ -140,11 +140,8 @@ lpfc_terminate_rport_io(struct fc_rport *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_nodelist *ndlp)
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) {

4
drivers/scsi/lpfc/lpfc_nportdisc.c
View file

@ -2559,12 +2559,10 @@ 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);

20
drivers/scsi/lpfc/lpfc_sli.c
View file

@ -11644,7 +11644,7 @@ lpfc_sli_issue_abort_iotag(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
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) {
@ -11942,7 +11942,6 @@ lpfc_sli_abort_fcp_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
/**
* 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.
@ -11957,18 +11956,22 @@ lpfc_sli_abort_fcp_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
* 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)
@ -11982,8 +11985,15 @@ lpfc_sli_abort_iocb(struct lpfc_vport *vport, struct lpfc_sli_ring *pring,
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++;