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scsi: lpfc: Validate ELS LS_ACC completion payload

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A WCQE success completion status does not guarantee valid LS_ACC receipt
for ELS commands.  So, introduce a small helper routine that validates ELS
LS_ACC frames in ELS cmpl routines.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20231009161812.97232-5-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Justin Tee 2023-10-09 09:18:10 -07:00 committed by Martin K. Petersen
parent 12e896c742
commit a3c3c0a806
1 changed files with 23 additions and 0 deletions
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23
drivers/scsi/lpfc/lpfc_els.c
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@ -131,6 +131,15 @@ lpfc_els_chk_latt(struct lpfc_vport *vport)
return 1;
}
static bool lpfc_is_els_acc_rsp(struct lpfc_dmabuf *buf)
{
struct fc_els_ls_acc *rsp = buf->virt;
if (rsp && rsp->la_cmd == ELS_LS_ACC)
return true;
return false;
}
/**
* lpfc_prep_els_iocb - Allocate and prepare a lpfc iocb data structure
* @vport: pointer to a host virtual N_Port data structure.
@ -1107,6 +1116,8 @@ stop_rr_fcf_flogi:
prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
if (!prsp)
goto out;
if (!lpfc_is_els_acc_rsp(prsp))
goto out;
sp = prsp->virt + sizeof(uint32_t);
/* FLOGI completes successfully */
@ -2119,6 +2130,10 @@ lpfc_cmpl_els_plogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
/* Good status, call state machine */
prsp = list_entry(cmdiocb->cmd_dmabuf->list.next,
struct lpfc_dmabuf, list);
if (!prsp)
goto out;
if (!lpfc_is_els_acc_rsp(prsp))
goto out;
ndlp = lpfc_plogi_confirm_nport(phba, prsp->virt, ndlp);
sp = (struct serv_parm *)((u8 *)prsp->virt +
@ -3445,6 +3460,8 @@ lpfc_cmpl_els_disc_cmd(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
prdf = (struct lpfc_els_rdf_rsp *)prsp->virt;
if (!prdf)
goto out;
if (!lpfc_is_els_acc_rsp(prsp))
goto out;
for (i = 0; i < ELS_RDF_REG_TAG_CNT &&
i < be32_to_cpu(prdf->reg_d1.reg_desc.count); i++)
@ -4043,6 +4060,9 @@ lpfc_cmpl_els_edc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
edc_rsp->acc_hdr.la_cmd,
be32_to_cpu(edc_rsp->desc_list_len));
if (!lpfc_is_els_acc_rsp(prsp))
goto out;
/*
* Payload length in bytes is the response descriptor list
* length minus the 12 bytes of Link Service Request
@ -11339,6 +11359,9 @@ lpfc_cmpl_els_fdisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
if (!prsp)
goto out;
if (!lpfc_is_els_acc_rsp(prsp))
goto out;
sp = prsp->virt + sizeof(uint32_t);
fabric_param_changed = lpfc_check_clean_addr_bit(vport, sp);
memcpy(&vport->fabric_portname, &sp->portName,