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{
    "id": 2232023,
    "url": "http://patchwork.ozlabs.org/api/1.2/patches/2232023/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260502083422.2955909-3-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",
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    "msgid": "<20260502083422.2955909-3-zisenye@stu.xidian.edu.cn>",
    "list_archive_url": null,
    "date": "2026-05-02T08:34:22",
    "name": "[2/2] smb/client: fix out-of-bounds read in symlink_data()",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "59d5f8337855fc1be054c9656e0de5758e7d39b4",
    "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/20260502083422.2955909-3-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/2232023/comments/",
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    "tags": {},
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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 2/2] smb/client: fix out-of-bounds read in symlink_data()",
        "Date": "Sat,  2 May 2026 16:34:22 +0800",
        "Message-ID": "<20260502083422.2955909-3-zisenye@stu.xidian.edu.cn>",
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        "References": "<20260502083422.2955909-1-zisenye@stu.xidian.edu.cn>",
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    },
    "content": "Since smb2_check_message() returns success without length validation for\nthe symlink error response, in symlink_data() it is possible for\niov->iov_len to be smaller than sizeof(struct smb2_err_rsp). If the buffer\nonly contains the base SMB2 header (64 bytes), accessing\nerr->ErrorContextCount (at offset 66) or err->ByteCount later in\nsymlink_data() will cause an out-of-bounds read.\n\nLink: https://lore.kernel.org/linux-cifs/297d8d9b-adf7-42fd-a1c2-5b1f230032bc@chenxiaosong.com/\nSigned-off-by: Zisen Ye <zisenye@stu.xidian.edu.cn>\nReviewed-by: ChenXiaoSong <chenxiaosong@kylinos.cn>\n---\n fs/smb/client/smb2misc.c | 3 ++-\n 1 file changed, 2 insertions(+), 1 deletion(-)",
    "diff": "diff --git a/fs/smb/client/smb2misc.c b/fs/smb/client/smb2misc.c\nindex 973fce3c959c..2a7355ce1a07 100644\n--- a/fs/smb/client/smb2misc.c\n+++ b/fs/smb/client/smb2misc.c\n@@ -241,7 +241,8 @@ smb2_check_message(char *buf, unsigned int pdu_len, unsigned int len,\n \tif (len != calc_len) {\n \t\t/* create failed on symlink */\n \t\tif (command == SMB2_CREATE_HE &&\n-\t\t    shdr->Status == STATUS_STOPPED_ON_SYMLINK)\n+\t\t    shdr->Status == STATUS_STOPPED_ON_SYMLINK &&\n+\t\t    len > calc_len)\n \t\t\treturn 0;\n \t\t/* Windows 7 server returns 24 bytes more */\n \t\tif (calc_len + 24 == len && command == SMB2_OPLOCK_BREAK_HE)\n",
    "prefixes": [
        "2/2"
    ]
}