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scsi: lpfc: Fix KASAN slab-out-of-bounds in lpfc_unreg_rpi() routine 

In lpfc_offline_prep() an RPI is freed and nlp_rpi set to 0xFFFF before
calling lpfc_unreg_rpi().  Unfortunately, lpfc_unreg_rpi() uses nlp_rpi to
index the sli4_hba.rpi_ids[] array.

In lpfc_offline_prep(), unreg rpi before freeing the rpi.

Link: https://lore.kernel.org/r/20210707184351.67872-12-jsmart2021@gmail.com
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 2021-07-07 11:43:42 -07:00 committed by Martin K. Petersen
parent e78c006f4c
commit affbe24429
1 changed files with 2 additions and 1 deletions
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3
drivers/scsi/lpfc/lpfc_init.c
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@ -3541,6 +3541,8 @@ lpfc_offline_prep(struct lpfc_hba *phba, int mbx_action)
spin_lock_irq(&ndlp->lock);
ndlp->nlp_flag &= ~NLP_NPR_ADISC;
spin_unlock_irq(&ndlp->lock);
lpfc_unreg_rpi(vports[i], ndlp);
/*
* Whenever an SLI4 port goes offline, free the
* RPI. Get a new RPI when the adapter port
@ -3556,7 +3558,6 @@ lpfc_offline_prep(struct lpfc_hba *phba, int mbx_action)
lpfc_sli4_free_rpi(phba, ndlp->nlp_rpi);
ndlp->nlp_rpi = LPFC_RPI_ALLOC_ERROR;
}
lpfc_unreg_rpi(vports[i], ndlp);
if (ndlp->nlp_type & NLP_FABRIC) {
lpfc_disc_state_machine(vports[i], ndlp,