From patchwork Mon Dec 28 12:51:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 354840 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_RED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0FD1C433E6 for ; Mon, 28 Dec 2020 14:36:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BBBF822B37 for ; Mon, 28 Dec 2020 14:36:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2504185AbgL1Oc6 (ORCPT ); Mon, 28 Dec 2020 09:32:58 -0500 Received: from mail.kernel.org ([198.145.29.99]:39562 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2504356AbgL1ObV (ORCPT ); Mon, 28 Dec 2020 09:31:21 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8C0382245C; Mon, 28 Dec 2020 14:30:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1609165841; bh=xni1xbnFKMBXSg0riPo9DOg8dKdcuDT9JL1hPe3zpxA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dc33vX19f3DCFMfskJ8VwLf04x3I6fbkNeJXXe0qk6z8mJBs6BHArZNZlDh1nGVxN 0Fic7eat7UbPuBaQCke+mY68+XdXAen8JF5BK6mrf4t+OkTf2EHBEFgEwJYPMXinbZ Y+x20b5flz5AxwPsGJSdqfZlbvmDRasevOB9xDZI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, James Smart , "Martin K. Petersen" Subject: [PATCH 5.10 672/717] scsi: lpfc: Re-fix use after free in lpfc_rq_buf_free() Date: Mon, 28 Dec 2020 13:51:10 +0100 Message-Id: <20201228125053.178924484@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201228125020.963311703@linuxfoundation.org> References: <20201228125020.963311703@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: James Smart commit e5785d3ec32f5f44dd88cd7b398e496742630469 upstream. Commit 9816ef6ecbc1 ("scsi: lpfc: Use after free in lpfc_rq_buf_free()") was made to correct a use after free condition in lpfc_rq_buf_free(). Unfortunately, a subsequent patch cut on a tree without the fix inadvertently reverted the fix. Put the fix back: Move the freeing of the rqb_entry to after the print function that references it. Link: https://lore.kernel.org/r/20201020202719.54726-4-james.smart@broadcom.com Fixes: 411de511c694 ("scsi: lpfc: Fix RQ empty firmware trap") Cc: # v4.17+ Signed-off-by: James Smart Signed-off-by: Martin K. Petersen Signed-off-by: Greg Kroah-Hartman --- 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 @@ -721,7 +721,6 @@ 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 HRQ %d: %x %x %x " "DRQ %x %x\n", @@ -731,6 +730,7 @@ lpfc_rq_buf_free(struct lpfc_hba *phba, rqb_entry->hrq->entry_count, rqb_entry->drq->host_index, rqb_entry->drq->hba_index); + (rqbp->rqb_free_buffer)(phba, rqb_entry); } else { list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list); rqbp->buffer_count++;