From: James Smart <jsmart2021@xxxxxxxxx> [ Upstream commit 79b20beccea3a3938a8500acef4e6b9d7c66142f ] An error is detected with the following report when unloading the driver: "KASAN: use-after-free in lpfc_unreg_rpi+0x1b1b" The NLP_REG_LOGIN_SEND nlp_flag is set in lpfc_reg_fab_ctrl_node(), but the flag is not cleared upon completion of the login. This allows a second call to lpfc_unreg_rpi() to proceed with nlp_rpi set to LPFC_RPI_ALLOW_ERROR. This results in a use after free access when used as an rpi_ids array index. Fix by clearing the NLP_REG_LOGIN_SEND nlp_flag in lpfc_mbx_cmpl_fc_reg_login(). Link: https://lore.kernel.org/r/20211020211417.88754-5-jsmart2021@xxxxxxxxx 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: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/scsi/lpfc/lpfc_hbadisc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c index 7cc5920979f8a..6a7754105ce3a 100644 --- a/drivers/scsi/lpfc/lpfc_hbadisc.c +++ b/drivers/scsi/lpfc/lpfc_hbadisc.c @@ -4340,6 +4340,7 @@ lpfc_mbx_cmpl_fc_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb) ndlp->nlp_state); ndlp->nlp_flag |= NLP_RPI_REGISTERED; + ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND; ndlp->nlp_type |= NLP_FABRIC; lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE); -- 2.33.0
