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{
    "id": 2230106,
    "url": "http://patchwork.ozlabs.org/api/1.1/patches/2230106/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260429085956.GA3326432@chcpu16/",
    "project": {
        "id": 12,
        "url": "http://patchwork.ozlabs.org/api/1.1/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": "<20260429085956.GA3326432@chcpu16>",
    "date": "2026-04-29T08:59:56",
    "name": "ksmbd: fail share config requests when path allocation fails",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "31d7b6ce8f79afe7ea672a0b8a9fea943aeb696d",
    "submitter": {
        "id": 91564,
        "url": "http://patchwork.ozlabs.org/api/1.1/people/91564/?format=api",
        "name": "Shuhao Fu",
        "email": "sfual@cse.ust.hk"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260429085956.GA3326432@chcpu16/mbox/",
    "series": [
        {
            "id": 502018,
            "url": "http://patchwork.ozlabs.org/api/1.1/series/502018/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/list/?series=502018",
            "date": "2026-04-29T08:59:56",
            "name": "ksmbd: fail share config requests when path allocation fails",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/502018/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/2230106/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/2230106/checks/",
    "tags": {},
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        "Date": "Wed, 29 Apr 2026 16:59:56 +0800",
        "From": "Shuhao Fu <sfual@cse.ust.hk>",
        "To": "Namjae Jeon <linkinjeon@kernel.org>, Steve French <smfrench@gmail.com>,\n        linux-cifs@vger.kernel.org",
        "Cc": "Sergey Senozhatsky <senozhatsky@chromium.org>,\n Tom Talpey <tom@talpey.com>,\n        linux-kernel@vger.kernel.org",
        "Subject": "[PATCH] ksmbd: fail share config requests when path allocation fails",
        "Message-ID": "<20260429085956.GA3326432@chcpu16>",
        "Precedence": "bulk",
        "X-Mailing-List": "linux-cifs@vger.kernel.org",
        "List-Id": "<linux-cifs.vger.kernel.org>",
        "List-Subscribe": "<mailto:linux-cifs+subscribe@vger.kernel.org>",
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    "content": "Non-pipe shares must have a duplicated backing path before they can be\npublished. share_config_request() currently calls kstrndup() for that\npath, but if the allocation fails it leaves ret unchanged. If veto list\nparsing succeeds and share->name exists, the partially built share is\nstill inserted into the global share table with share->path left NULL.\n\nA later share-root SMB2 create uses tree_conn->share_conf->path as the\nlookup root. If the share was published with path == NULL, that request\npasses a NULL pathname into do_getname_kernel()/strlen() and can crash\nthe ksmbd worker.\n\nSet ret = -ENOMEM when path duplication fails so the incomplete share is\ndestroyed before publication.\n\nFixes: e2f34481b24d (\"cifsd: add server-side procedures for SMB3\")\nSigned-off-by: Shuhao Fu <sfual@cse.ust.hk>\n---\n fs/smb/server/mgmt/share_config.c | 12 ++++++++----\n 1 file changed, 8 insertions(+), 4 deletions(-)",
    "diff": "diff --git a/fs/smb/server/mgmt/share_config.c b/fs/smb/server/mgmt/share_config.c\nindex 53f44ff4d376f3e..6f97f8d39657cd2 100644\n--- a/fs/smb/server/mgmt/share_config.c\n+++ b/fs/smb/server/mgmt/share_config.c\n@@ -167,7 +167,10 @@ static struct ksmbd_share_config *share_config_request(struct ksmbd_work *work,\n \n \t\tshare->path = kstrndup(ksmbd_share_config_path(resp), path_len,\n \t\t\t\t      KSMBD_DEFAULT_GFP);\n-\t\tif (share->path) {\n+\t\tif (!share->path) {\n+\t\t\tret = -ENOMEM;\n+\t\t} else {\n+\t\t\tret = 0;\n \t\t\tshare->path_sz = strlen(share->path);\n \t\t\twhile (share->path_sz > 1 &&\n \t\t\t       share->path[share->path_sz - 1] == '/')\n@@ -179,9 +182,10 @@ static struct ksmbd_share_config *share_config_request(struct ksmbd_work *work,\n \t\tshare->force_directory_mode = resp->force_directory_mode;\n \t\tshare->force_uid = resp->force_uid;\n \t\tshare->force_gid = resp->force_gid;\n-\t\tret = parse_veto_list(share,\n-\t\t\t\t      KSMBD_SHARE_CONFIG_VETO_LIST(resp),\n-\t\t\t\t      resp->veto_list_sz);\n+\t\tif (!ret)\n+\t\t\tret = parse_veto_list(share,\n+\t\t\t\t\t      KSMBD_SHARE_CONFIG_VETO_LIST(resp),\n+\t\t\t\t\t      resp->veto_list_sz);\n \t\tif (!ret && share->path) {\n \t\t\tif (__ksmbd_override_fsids(work, share)) {\n \t\t\t\tkill_share(share);\n",
    "prefixes": []
}