From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B530F56C658; Wed, 9 Sep 2026 14:29:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788964201; cv=none; b=MBOGUPwWRUMe2fsuXVJaW+B4WKcD9vWEa4nLGHfEPAMBGoWTe40PU41wPzbpuS2A1XWHlT1CcOshD9BHE//tYF5t5jg0EWEIkbSPz/iX5W3WaFmlsxTVCs1933vheyqKcSHayeNcenOjWCqWkiMvIJVHK6h0lLO/vQqV67IRIeo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788964201; c=relaxed/simple; bh=JRHsuddlNtSR2MkUHiAdNS5OhhsHJCdH24AdScxVIRA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=h2PkqsjkgQ28m+UocTrWqz2jeBrGODTNQvHrNgfoBc7ka+stbcCKRWqJaAQNFvdYe8zTkJl+1fopeQRvG/I3qiWICJKIMTlWPCx0tAlfwBGyke0jB8bOIUMgyq1Ek9JXLB5bxqO4mzk+8zetMfQwXvIXXFIMjl07ghl0Ks8GPlI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=AAAqAHx6; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="AAAqAHx6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 197EC1F00A3A; Wed, 9 Sep 2026 14:29:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788964199; bh=YplcE33aRJ1+g41hYebo5Zw4OIG9fo13LnjfXf3XI/w=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=AAAqAHx6FYyylvHdbM4nzA7logRBXrDuBfWgPHZ9gWDqsLTs5qpr23eMmz8q8X2rm Db0O0gKMQYf1/NYDdDq+eBKocKR1SkkqzUuiYCZX4F7ixb0fV6Xi7IhKIy8JhRMYFX 6E971bl77Yk1nHDYrGxsm1a/e1N+WwcYXegCDxv8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sashiko , Nilesh Javali , "Martin K. Petersen (Oracle)" Subject: [PATCH 6.18 341/583] scsi: qla2xxx: Quiesce response IRQ before freeing request queue Date: Wed, 9 Sep 2026 15:40:26 +0200 Message-ID: <20260909134249.805665475@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260909134237.773280130@linuxfoundation.org> References: <20260909134237.773280130@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nilesh Javali commit 505753ec2594c6af09a601f0dd60be7d840c1d2d upstream. qla2xxx_delete_qpair() deletes the request queue before the response queue. qla25xx_delete_req_que() frees the request queue memory (kfree(req) in qla25xx_free_req_que()), but the response-queue MSI-X is only released later, in qla25xx_free_rsp_que(). In that window the response interrupt can still fire, qla2xxx_msix_rsp_q() queues qpair->q_work, and qla_do_work() -> qla24xx_process_response_queue() dereferences the now-freed rsp->req (LOGINOUT/CT/ELS entries and the status path), a use-after-free. The cancel_work_sync() added for the qpair teardown lives in the response free path, which runs after the request queue is already freed, so it does not protect rsp->req. Release the response-queue interrupt and flush qpair->q_work before deleting the request queue, so no late completion can reach the freed request queue. Clearing have_irq makes the subsequent qla25xx_free_rsp_que() skip its free_irq(), and the firmware queue-delete order (request then response) is preserved; the request-delete mailbox completes on the default vector and is unaffected by dropping the qpair response interrupt early. Fixes: d74595278f4a ("scsi: qla2xxx: Add multiple queue pair functionality.") Cc: stable@vger.kernel.org Reported-by: Sashiko Signed-off-by: Nilesh Javali Link: https://patch.msgid.link/20260730155838.2119230-18-njavali@marvell.com Signed-off-by: Martin K. Petersen (Oracle) Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/qla2xxx/qla_init.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -9849,11 +9849,28 @@ int qla2xxx_delete_qpair(struct scsi_qla { int ret = QLA_FUNCTION_FAILED; struct qla_hw_data *ha = qpair->hw; + struct rsp_que *rsp = qpair->rsp; qpair->delete_in_progress = 1; qla_free_buf_pool(qpair); + /* + * The response-queue interrupt schedules qla_do_work(), which + * dereferences qpair->rsp->req. Release the interrupt and flush + * any pending work before the request queue is freed below so a + * late completion cannot touch the freed request queue. The + * firmware queue-delete order (request then response) is kept. + */ + if (rsp && rsp->msix && rsp->msix->have_irq) { + free_irq(rsp->msix->vector, rsp->msix->handle); + rsp->msix->have_irq = 0; + rsp->msix->in_use = 0; + rsp->msix->handle = NULL; + } + if (rsp && ha->wq) + cancel_work_sync(&qpair->q_work); + ret = qla25xx_delete_req_que(vha, qpair->req); if (ret != QLA_SUCCESS) goto fail;