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{ "id": 2222624, "url": "http://patchwork.ozlabs.org/api/1.1/covers/2222624/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/cover/20260413075250.281653-1-wei.fang@nxp.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/1.1/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/" }, "msgid": "<20260413075250.281653-1-wei.fang@nxp.com>", "date": "2026-04-13T07:52:48", "name": "[net,0/2] net: enetc: fix command BD ring issues", "submitter": { "id": 84380, "url": "http://patchwork.ozlabs.org/api/1.1/people/84380/?format=api", "name": "Wei Fang", "email": "wei.fang@nxp.com" }, "mbox": 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c=relaxed/relaxed; d=nxp.com; s=selector1;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;\n bh=do0AuH3dtvno41xfy3ln5li3TMODmlQ8+vENfvP3kfA=;\n b=h6YBNbFmFbQukAwOS98NvZLeKU24Km5wm1Q0eZPOelqkxTS6y84RDOSxR66IhM1c9fz7LSrhZMP2jZyEYa6E+6mq3S9MkCOlZjKJ5QsrTul3Hh4nPRv6zOmu4ASt2MhPlQ1sKGY+zEXlWmHgUJTuw/s1goHl2vvH+0NbplGBW048UCyczylWq6NmdwNp5/6y/SmplwIw+751OV4B5l9sB1pkA+ZfD4UkB5x4kzNp1tX7VdVQNQtVshWzHjP1UtjZBUSzJJGqUofb4ajmonGIl01iw8usSMCzgQ2v3CLK3fgqXrf5hfAyF1pm5is99q25mcL/gBMWEB9N+5xDRbNlUQ==", "From": "Wei Fang <wei.fang@nxp.com>", "To": "claudiu.manoil@nxp.com,\n\tvladimir.oltean@nxp.com,\n\txiaoning.wang@nxp.com,\n\tandrew+netdev@lunn.ch,\n\tdavem@davemloft.net,\n\tedumazet@google.com,\n\tkuba@kernel.org,\n\tpabeni@redhat.com,\n\tchleroy@kernel.org", "Cc": "netdev@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org,\n\timx@lists.linux.dev,\n\tlinuxppc-dev@lists.ozlabs.org,\n\tlinux-arm-kernel@lists.infradead.org", "Subject": "[PATCH net 0/2] net: enetc: fix command BD ring issues", "Date": "Mon, 13 Apr 2026 15:52:48 +0800", "Message-Id": "<20260413075250.281653-1-wei.fang@nxp.com>", "X-Mailer": "git-send-email 2.34.1", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-ClientProxiedBy": "MA5P287CA0236.INDP287.PROD.OUTLOOK.COM\n (2603:1096:a01:1b1::10) To AM8PR04MB7284.eurprd04.prod.outlook.com\n (2603:10a6:20b:1dc::8)", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": 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(2024-03-25) on lists.ozlabs.org" }, "content": "Currently, the implementation of command BD ring has two issues, one is\nthat the driver may obtain wrong consumer index of the ring, because the\ndriver does not mask out the SBE bit of the CIR value, so a wrong index\nwill be obtained when a SBE error ouccrs. The other one is that the DMA\nbuffer may be used after free. If netc_xmit_ntmp_cmd() times out and\nreturns an error, the pending command is not explicitly aborted, while\nntmp_free_data_mem() unconditionally frees the DMA buffer. If the buffer\nhas already been reallocated elsewhere, this may lead to silent memory\ncorruption. Because the hardware eventually processes the pending command\nand perform a DMA write of the response to the physical address of the\nfreed buffer. So this patch set is to fix these two issues.\n\nWei Fang (2):\n net: enetc: correct the command BD ring consumer index\n net: enetc: fix NTMP DMA use-after-free issue\n\n drivers/net/ethernet/freescale/enetc/ntmp.c | 161 ++++++++++--------\n .../ethernet/freescale/enetc/ntmp_private.h | 9 +-\n include/linux/fsl/ntmp.h | 9 +-\n 3 files changed, 96 insertions(+), 83 deletions(-)" }