This is a note to let you know that I've just added the patch titled scsi: lpfc: Use after free in lpfc_rq_buf_free() to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: scsi-lpfc-use-after-free-in-lpfc_rq_buf_free.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Fri Feb 23 11:45:09 CET 2018 From: Dan Carpenter <dan.carpenter@xxxxxxxxxx> Date: Wed, 22 Nov 2017 11:58:03 +0300 Subject: scsi: lpfc: Use after free in lpfc_rq_buf_free() From: Dan Carpenter <dan.carpenter@xxxxxxxxxx> [ Upstream commit 9816ef6ecbc102b9bcbb1d83e12c7fb19924f38c ] The error message dereferences "rqb_entry" so we need to print it first and then free the buffer. Fixes: 6c621a2229b0 ("scsi: lpfc: Separate NVMET RQ buffer posting from IO resources SGL/iocbq/context") Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> Acked-by: Dick Kennedy <dick.kennedy@xxxxxxxxxxxx> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/scsi/lpfc/lpfc_mem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/scsi/lpfc/lpfc_mem.c +++ b/drivers/scsi/lpfc/lpfc_mem.c @@ -753,12 +753,12 @@ lpfc_rq_buf_free(struct lpfc_hba *phba, drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys); rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe); if (rc < 0) { - (rqbp->rqb_free_buffer)(phba, rqb_entry); lpfc_printf_log(phba, KERN_ERR, LOG_INIT, "6409 Cannot post to RQ %d: %x %x\n", rqb_entry->hrq->queue_id, rqb_entry->hrq->host_index, rqb_entry->hrq->hba_index); + (rqbp->rqb_free_buffer)(phba, rqb_entry); } else { list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list); rqbp->buffer_count++; Patches currently in stable-queue which might be from dan.carpenter@xxxxxxxxxx are queue-4.14/scsi-lpfc-use-after-free-in-lpfc_rq_buf_free.patch queue-4.14/staging-ccree-uninitialized-return-in-ssi_ahash_import.patch