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%3Ba=su...
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@vger.kernel.org know about it.
From foo@baz Fri Feb 23 11:45:09 CET 2018
From: Dan Carpenter dan.carpenter@oracle.com 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@oracle.com
[ 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@oracle.com Acked-by: Dick Kennedy dick.kennedy@broadcom.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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@oracle.com 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