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{
    "id": 2232022,
    "url": "http://patchwork.ozlabs.org/api/1.2/patches/2232022/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260502083422.2955909-2-zisenye@stu.xidian.edu.cn/",
    "project": {
        "id": 12,
        "url": "http://patchwork.ozlabs.org/api/1.2/projects/12/?format=api",
        "name": "Linux CIFS Client",
        "link_name": "linux-cifs-client",
        "list_id": "linux-cifs.vger.kernel.org",
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    "msgid": "<20260502083422.2955909-2-zisenye@stu.xidian.edu.cn>",
    "list_archive_url": null,
    "date": "2026-05-02T08:34:21",
    "name": "[1/2] smb/client: fix out-of-bounds read in smb2_compound_op()",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "76dfc9c200e78a08413a4c5674b4805a126f3c72",
    "submitter": {
        "id": 93303,
        "url": "http://patchwork.ozlabs.org/api/1.2/people/93303/?format=api",
        "name": "Zisen Ye",
        "email": "zisenye@stu.xidian.edu.cn"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260502083422.2955909-2-zisenye@stu.xidian.edu.cn/mbox/",
    "series": [
        {
            "id": 502519,
            "url": "http://patchwork.ozlabs.org/api/1.2/series/502519/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/list/?series=502519",
            "date": "2026-05-02T08:34:21",
            "name": "smb/client: fix out-of-bounds read",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/502519/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/2232022/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/2232022/checks/",
    "tags": {},
    "related": [],
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        "From": "Zisen Ye <zisenye@stu.xidian.edu.cn>",
        "To": "smfrench@gmail.com,\n\tlinkinjeon@kernel.org,\n\tpc@manguebit.org,\n\tronniesahlberg@gmail.com,\n\tsprasad@microsoft.com,\n\ttom@talpey.com,\n\tbharathsm@microsoft.com,\n\tsenozhatsky@chromium.org,\n\tdhowells@redhat.com,\n\tchenxiaosong@chenxiaosong.com,\n\tgregkh@linuxfoundation.org",
        "Cc": "linux-cifs@vger.kernel.org,\n\tZisen Ye <zisenye@stu.xidian.edu.cn>,\n\tChenXiaoSong <chenxiaosong@kylinos.cn>",
        "Subject": "[PATCH 1/2] smb/client: fix out-of-bounds read in smb2_compound_op()",
        "Date": "Sat,  2 May 2026 16:34:21 +0800",
        "Message-ID": "<20260502083422.2955909-2-zisenye@stu.xidian.edu.cn>",
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        "In-Reply-To": "<20260502083422.2955909-1-zisenye@stu.xidian.edu.cn>",
        "References": "<20260502083422.2955909-1-zisenye@stu.xidian.edu.cn>",
        "Precedence": "bulk",
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    },
    "content": "If a server sends a truncated response but a large OutputBufferLength, and\nterminates the EA list early, check_wsl_eas() returns success without\nvalidating that the entire OutputBufferLength fits within iov_len.\n\nThen smb2_compound_op() does:\n    memcpy(idata->wsl.eas, data[0], size[0]);\n\nWhere size[0] is OutputBufferLength. If iov_len is smaller than size[0],\nmemcpy can read beyond the end of the rsp_iov allocation and leak adjacent\nkernel heap memory.\n\nLink: https://lore.kernel.org/linux-cifs/d998240c-aca9-420d-9dbd-f5ba24af19e0@chenxiaosong.com/\nSigned-off-by: Zisen Ye <zisenye@stu.xidian.edu.cn>\nReviewed-by: ChenXiaoSong <chenxiaosong@kylinos.cn>\n---\n fs/smb/client/smb2inode.c | 3 +++\n 1 file changed, 3 insertions(+)",
    "diff": "diff --git a/fs/smb/client/smb2inode.c b/fs/smb/client/smb2inode.c\nindex 286912616c73..a192d70cd29e 100644\n--- a/fs/smb/client/smb2inode.c\n+++ b/fs/smb/client/smb2inode.c\n@@ -121,6 +121,9 @@ static int check_wsl_eas(struct kvec *rsp_iov)\n \tea = (void *)((u8 *)rsp_iov->iov_base +\n \t\t      le16_to_cpu(rsp->OutputBufferOffset));\n \tend = (u8 *)rsp_iov->iov_base + rsp_iov->iov_len;\n+\tif (ea + outlen > end)\n+\t\treturn -EINVAL;\n+\n \tfor (;;) {\n \t\tif ((u8 *)ea > end - sizeof(*ea))\n \t\t\treturn -EINVAL;\n",
    "prefixes": [
        "1/2"
    ]
}