From dbebf865b3239595c1d4dba063b122862583b52a Mon Sep 17 00:00:00 2001 From: James Smart Date: Wed, 20 Oct 2021 14:14:13 -0700 Subject: scsi: lpfc: Fix use-after-free in lpfc_unreg_rpi() routine [ 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@gmail.com Co-developed-by: Justin Tee Signed-off-by: Justin Tee Signed-off-by: James Smart Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/lpfc/lpfc_hbadisc.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/scsi') diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c index 6f2e07c30f98..e1c02229c82d 100644 --- a/drivers/scsi/lpfc/lpfc_hbadisc.c +++ b/drivers/scsi/lpfc/lpfc_hbadisc.c @@ -4360,6 +4360,7 @@ 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); -- cgit v1.2.3