From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 052F81170E for ; Mon, 11 Sep 2023 14:18:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 78865C433C7; Mon, 11 Sep 2023 14:18:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1694441934; bh=EZkyWdaOGO1tIK90voxEgy4x9vr+sHomVKCSsg86m9o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Z6wdiGMuM7ErT9u82IQx8yS+qfk4SMGlfUkycfUql7EViaJ6kzHoI+2dSNnu+PYl6 7cB6W8QEIvp4bppnkbtUT4uA5WriaK31GqqY5+N90Bevn9oDy2nYuCE7CSVBK7YnWx cXvReeXebhVHHCa3w4QbTIAmNnXH5ZN13h56870Q= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Michael Margolin , Yossi Leybovich , Yonatan Nachum , Leon Romanovsky , Sasha Levin Subject: [PATCH 6.5 580/739] RDMA/efa: Fix wrong resources deallocation order Date: Mon, 11 Sep 2023 15:46:19 +0200 Message-ID: <20230911134707.307176795@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230911134650.921299741@linuxfoundation.org> References: <20230911134650.921299741@linuxfoundation.org> User-Agent: quilt/0.67 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 6.5-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yonatan Nachum [ Upstream commit dc202c57e9a1423aed528e4b8dc949509cd32191 ] When trying to destroy QP or CQ, we first decrease the refcount and potentially free memory regions allocated for the object and then request the device to destroy the object. If the device fails, the object isn't fully destroyed so the user/IB core can try to destroy the object again which will lead to underflow when trying to decrease an already zeroed refcount. Deallocate resources in reverse order of allocating them to safely free them. Fixes: ff6629f88c52 ("RDMA/efa: Do not delay freeing of DMA pages") Reviewed-by: Michael Margolin Reviewed-by: Yossi Leybovich Signed-off-by: Yonatan Nachum Link: https://lore.kernel.org/r/20230822082725.31719-1-ynachum@amazon.com Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/efa/efa_verbs.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/infiniband/hw/efa/efa_verbs.c b/drivers/infiniband/hw/efa/efa_verbs.c index 2a195c4b0f17d..3538d59521e41 100644 --- a/drivers/infiniband/hw/efa/efa_verbs.c +++ b/drivers/infiniband/hw/efa/efa_verbs.c @@ -449,12 +449,12 @@ int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata) ibdev_dbg(&dev->ibdev, "Destroy qp[%u]\n", ibqp->qp_num); - efa_qp_user_mmap_entries_remove(qp); - err = efa_destroy_qp_handle(dev, qp->qp_handle); if (err) return err; + efa_qp_user_mmap_entries_remove(qp); + if (qp->rq_cpu_addr) { ibdev_dbg(&dev->ibdev, "qp->cpu_addr[0x%p] freed: size[%lu], dma[%pad]\n", @@ -1013,8 +1013,8 @@ int efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata) "Destroy cq[%d] virt[0x%p] freed: size[%lu], dma[%pad]\n", cq->cq_idx, cq->cpu_addr, cq->size, &cq->dma_addr); - efa_cq_user_mmap_entries_remove(cq); efa_destroy_cq_idx(dev, cq->cq_idx); + efa_cq_user_mmap_entries_remove(cq); if (cq->eq) { xa_erase(&dev->cqs_xa, cq->cq_idx); synchronize_irq(cq->eq->irq.irqn); -- 2.40.1