From patchwork Tue May 28 06:09:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nikita Shubin via B4 Relay X-Patchwork-Id: 13676146 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 2E876DF6B; Tue, 28 May 2024 06:09:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716876565; cv=none; b=tyjcgKRmZJ/ZxJ3efVVNCBldLnTW0YciY+QP5v94VtdIAqh7Vj9E/g2P3P8dmdaVYGc24bdYntN+51YW7eo4sMRcGvocFxOK5k+Kxmyjj2w2hkLcv+sXsyYMOTFEZ5mRTEXPcTRluL/FVhiWqOVcNlJXKiE/CwFEMIImesKKO14= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716876565; c=relaxed/simple; bh=nKrlwxVQZ9JWwpGEnhgFrcVm0BXTkJ1KgeGuEWOqKj8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=hT9IZvq1fw6v3LHjyco15exRiw+S9mCywojOab/KqecPcktfp89ZPR30TQ0n8iOC/oEldWsgNAph6sVV+QrZEdhUl+X+0GdcWPIosNhtaOtKQR2Rk+HMTYRO85oHVdvFOd29C6g+uXboawWe5nlfqG/Z6ixHOjw84YiE0WQfHeI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=in+WL5mo; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="in+WL5mo" Received: by smtp.kernel.org (Postfix) with ESMTPS id CAA5FC32786; Tue, 28 May 2024 06:09:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1716876564; bh=nKrlwxVQZ9JWwpGEnhgFrcVm0BXTkJ1KgeGuEWOqKj8=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=in+WL5mous3ATfr/+7DOLw07nAg78gfEuavJmC7UPmOOqUNO5ut+txv2j8/x/v8CM l6L66bVFW3OEw1wWmjkVOcT6BPfcWwoed7+aa2yO0SwYJ0xFQ7CxGrleb+FNWh/vMw oh7MFiQslGW9M6ZtuDlNJ9ipZme6TaQTfWLC6YTet0uOV8fdbAZhaNB3Fgveb3lL8F y/2DT7JD+xYa/sX3fPuz0aZGFTB8gAfkTctUWQyaeB54e4naMO/p2XntKKytg7MYej 82iIbErXcihXmOErJy43MpZ3S7eZBH/LCi2gS3EXmV3GSRURPVVJdLfn1a07C0kxIW DDAei6h2fBHrQ== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id B0E2AC25B7E; Tue, 28 May 2024 06:09:24 +0000 (UTC) From: Nikita Shubin via B4 Relay Date: Tue, 28 May 2024 09:09:23 +0300 Subject: [PATCH v2 1/3] dmaengine: ioatdma: Fix leaking on version mismatch Precedence: bulk X-Mailing-List: dmaengine@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240528-ioatdma-fixes-v2-1-a9f2fbe26ab1@yadro.com> References: <20240528-ioatdma-fixes-v2-0-a9f2fbe26ab1@yadro.com> In-Reply-To: <20240528-ioatdma-fixes-v2-0-a9f2fbe26ab1@yadro.com> To: Vinod Koul , Dave Jiang , Logan Gunthorpe Cc: Andy Shevchenko , Nikita Shubin , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, linux@yadro.com, Nikita Shubin X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1716876563; l=1829; i=n.shubin@yadro.com; s=20230718; h=from:subject:message-id; bh=ASVt6+nzAUVivKjUfhTrAzVsAPEzKEYVziXwIRDAuFU=; b=vpo6veO0EiOXKv0hYhTJJNEvRbRU1sbfQMuG2vWjy3lqgJHqU2tqnTVFSN2z+ubGZBVJX9qAa3xx v7zI2MRnCM0apPH/L8dPZb4icGLoAUz5mBQ0Q4nL3QtIGKaDJ/Yy X-Developer-Key: i=n.shubin@yadro.com; a=ed25519; pk=vqf5YIUJ7BJv3EJFaNNxWZgGuMgDH6rwufTLflwU9ac= X-Endpoint-Received: by B4 Relay for n.shubin@yadro.com/20230718 with auth_id=161 X-Original-From: Nikita Shubin Reply-To: n.shubin@yadro.com From: Nikita Shubin Fix leaking ioatdma_device if I/OAT version is less than IOAT_VER_3_0. Fixes: bf453a0a18b2 ("dmaengine: ioat: Support in-use unbind") Signed-off-by: Nikita Shubin --- drivers/dma/ioat/init.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c index 9c364e92cb82..e76e507ae898 100644 --- a/drivers/dma/ioat/init.c +++ b/drivers/dma/ioat/init.c @@ -1350,6 +1350,7 @@ static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) void __iomem * const *iomap; struct device *dev = &pdev->dev; struct ioatdma_device *device; + u8 version; int err; err = pcim_enable_device(pdev); @@ -1363,6 +1364,10 @@ static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (!iomap) return -ENOMEM; + version = readb(iomap[IOAT_MMIO_BAR] + IOAT_VER_OFFSET); + if (version < IOAT_VER_3_0) + return -ENODEV; + err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (err) return err; @@ -1373,16 +1378,14 @@ static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) pci_set_master(pdev); pci_set_drvdata(pdev, device); - device->version = readb(device->reg_base + IOAT_VER_OFFSET); + device->version = version; if (device->version >= IOAT_VER_3_4) ioat_dca_enabled = 0; - if (device->version >= IOAT_VER_3_0) { - if (is_skx_ioat(pdev)) - device->version = IOAT_VER_3_2; - err = ioat3_dma_probe(device, ioat_dca_enabled); - } else - return -ENODEV; + if (is_skx_ioat(pdev)) + device->version = IOAT_VER_3_2; + + err = ioat3_dma_probe(device, ioat_dca_enabled); if (err) { dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n"); return -ENODEV; From patchwork Tue May 28 06:09:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nikita Shubin via B4 Relay X-Patchwork-Id: 13676148 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 33E964D9F4; 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a=ed25519-sha256; t=1716876563; l=2344; i=n.shubin@yadro.com; s=20230718; h=from:subject:message-id; bh=ndoUzkFelZyO92hJgOMyePUbXfzsIUrSz43B8VvnQSw=; b=wPSkPuxu2pQ/S9Wnfb/LNOSGOhJ/T6XgcFUSUkg+ERcfklrp/fTuxSQ2uetgygBmRXOPVY0/dI5J LdjVOBlmBqYjmezsWEvpefml+CHqRjgOmAPfvUvxxcW0msPMgAed X-Developer-Key: i=n.shubin@yadro.com; a=ed25519; pk=vqf5YIUJ7BJv3EJFaNNxWZgGuMgDH6rwufTLflwU9ac= X-Endpoint-Received: by B4 Relay for n.shubin@yadro.com/20230718 with auth_id=161 X-Original-From: Nikita Shubin Reply-To: n.shubin@yadro.com From: Nikita Shubin Make sure we are disabling interrupts and destroying DMA pool if pcie_capability_read/write_word() call failed. Fixes: 511deae0261c ("dmaengine: ioatdma: disable relaxed ordering for ioatdma") Signed-off-by: Nikita Shubin --- drivers/dma/ioat/init.c | 33 +++++++++++++++------------------ 1 file changed, 15 insertions(+), 18 deletions(-) diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c index e76e507ae898..26964b7c8cf1 100644 --- a/drivers/dma/ioat/init.c +++ b/drivers/dma/ioat/init.c @@ -534,18 +534,6 @@ static int ioat_probe(struct ioatdma_device *ioat_dma) return err; } -static int ioat_register(struct ioatdma_device *ioat_dma) -{ - int err = dma_async_device_register(&ioat_dma->dma_dev); - - if (err) { - ioat_disable_interrupts(ioat_dma); - dma_pool_destroy(ioat_dma->completion_pool); - } - - return err; -} - static void ioat_dma_remove(struct ioatdma_device *ioat_dma) { struct dma_device *dma = &ioat_dma->dma_dev; @@ -1181,9 +1169,9 @@ static int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca) ioat_chan->reg_base + IOAT_DCACTRL_OFFSET); } - err = ioat_register(ioat_dma); + err = dma_async_device_register(&ioat_dma->dma_dev); if (err) - return err; + goto err_disable_interrupts; ioat_kobject_add(ioat_dma, &ioat_ktype); @@ -1192,20 +1180,29 @@ static int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca) /* disable relaxed ordering */ err = pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &val16); - if (err) - return pcibios_err_to_errno(err); + if (err) { + err = pcibios_err_to_errno(err); + goto err_disable_interrupts; + } /* clear relaxed ordering enable */ val16 &= ~PCI_EXP_DEVCTL_RELAX_EN; err = pcie_capability_write_word(pdev, PCI_EXP_DEVCTL, val16); - if (err) - return pcibios_err_to_errno(err); + if (err) { + err = pcibios_err_to_errno(err); + goto err_disable_interrupts; + } if (ioat_dma->cap & IOAT_CAP_DPS) writeb(ioat_pending_level + 1, ioat_dma->reg_base + IOAT_PREFETCH_LIMIT_OFFSET); return 0; + +err_disable_interrupts: + ioat_disable_interrupts(ioat_dma); + dma_pool_destroy(ioat_dma->completion_pool); + return err; } static void ioat_shutdown(struct pci_dev *pdev) From patchwork Tue May 28 06:09:25 2024 Content-Type: text/plain; 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Tue, 28 May 2024 06:09:24 +0000 (UTC) From: Nikita Shubin via B4 Relay Date: Tue, 28 May 2024 09:09:25 +0300 Subject: [PATCH v2 3/3] dmaengine: ioatdma: Fix kmemleak in ioat_pci_probe() Precedence: bulk X-Mailing-List: dmaengine@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240528-ioatdma-fixes-v2-3-a9f2fbe26ab1@yadro.com> References: <20240528-ioatdma-fixes-v2-0-a9f2fbe26ab1@yadro.com> In-Reply-To: <20240528-ioatdma-fixes-v2-0-a9f2fbe26ab1@yadro.com> To: Vinod Koul , Dave Jiang , Logan Gunthorpe Cc: Andy Shevchenko , Nikita Shubin , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, linux@yadro.com, Nikita Shubin X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1716876563; l=1823; i=n.shubin@yadro.com; s=20230718; h=from:subject:message-id; bh=tibFMcaMMDINAMULT2DBvxJYeYcAsWOCGa6cDYv40uU=; b=Spd8wOljNfdMMhAzdRsBkqUw7Og0HFDv9oagQ2CV4x/zau+jRsHiHjlwwnYJMz6jjFm38Gzeif5N xvJJmEOnDPT6u6tYxvot0aqRUcWdbEYraI1TO2qjxXOxk6eLRGxh X-Developer-Key: i=n.shubin@yadro.com; a=ed25519; pk=vqf5YIUJ7BJv3EJFaNNxWZgGuMgDH6rwufTLflwU9ac= X-Endpoint-Received: by B4 Relay for n.shubin@yadro.com/20230718 with auth_id=161 X-Original-From: Nikita Shubin Reply-To: n.shubin@yadro.com From: Nikita Shubin If probing fails we end up with leaking ioatdma_device and each allocated channel. Following kmemleak easy to reproduce by injecting an error in ioat_alloc_chan_resources() when doing ioat_dma_self_test(). unreferenced object 0xffff888014ad5800 (size 1024): [..] [] kmemleak_alloc+0x4a/0x80 [] kmalloc_trace+0x270/0x2f0 [] ioat_pci_probe+0xc1/0x1c0 [ioatdma] [..] repeated for each ioatdma channel: unreferenced object 0xffff8880148e5c00 (size 512): [..] [] kmemleak_alloc+0x4a/0x80 [] kmalloc_trace+0x270/0x2f0 [] ioat_enumerate_channels+0x101/0x2d0 [ioatdma] [] ioat3_dma_probe+0x4d6/0x970 [ioatdma] [] ioat_pci_probe+0x181/0x1c0 [ioatdma] [..] Fixes: bf453a0a18b2 ("dmaengine: ioat: Support in-use unbind") Signed-off-by: Nikita Shubin --- drivers/dma/ioat/init.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c index 26964b7c8cf1..cf688b0c8444 100644 --- a/drivers/dma/ioat/init.c +++ b/drivers/dma/ioat/init.c @@ -1347,6 +1347,7 @@ static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) void __iomem * const *iomap; struct device *dev = &pdev->dev; struct ioatdma_device *device; + unsigned int i; u8 version; int err; @@ -1384,6 +1385,9 @@ static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) err = ioat3_dma_probe(device, ioat_dca_enabled); if (err) { + for (i = 0; i < IOAT_MAX_CHANS; i++) + kfree(device->idx[i]); + kfree(device); dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n"); return -ENODEV; }