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{
    "id": 806128,
    "url": "http://patchwork.ozlabs.org/api/1.2/patches/806128/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/netdev/patch/1503760140-9095-4-git-send-email-minipli@googlemail.com/",
    "project": {
        "id": 7,
        "url": "http://patchwork.ozlabs.org/api/1.2/projects/7/?format=api",
        "name": "Linux network development",
        "link_name": "netdev",
        "list_id": "netdev.vger.kernel.org",
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    "msgid": "<1503760140-9095-4-git-send-email-minipli@googlemail.com>",
    "list_archive_url": null,
    "date": "2017-08-26T15:08:59",
    "name": "[net,3/4] xfrm_user: fix info leak in build_expire()",
    "commit_ref": null,
    "pull_url": null,
    "state": "awaiting-upstream",
    "archived": true,
    "hash": "cad443481f9ee93433780f8bf78942be79f486fa",
    "submitter": {
        "id": 6743,
        "url": "http://patchwork.ozlabs.org/api/1.2/people/6743/?format=api",
        "name": "Mathias Krause",
        "email": "minipli@googlemail.com"
    },
    "delegate": {
        "id": 34,
        "url": "http://patchwork.ozlabs.org/api/1.2/users/34/?format=api",
        "username": "davem",
        "first_name": "David",
        "last_name": "Miller",
        "email": "davem@davemloft.net"
    },
    "mbox": "http://patchwork.ozlabs.org/project/netdev/patch/1503760140-9095-4-git-send-email-minipli@googlemail.com/mbox/",
    "series": [],
    "comments": "http://patchwork.ozlabs.org/api/patches/806128/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/806128/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<netdev-owner@vger.kernel.org>",
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        "X-Received": "by 10.28.143.205 with SMTP id r196mr947458wmd.69.1503760169509; \n\tSat, 26 Aug 2017 08:09:29 -0700 (PDT)",
        "From": "Mathias Krause <minipli@googlemail.com>",
        "To": "Steffen Klassert <steffen.klassert@secunet.com>,\n\t\"David S. Miller\" <davem@davemloft.net>,\n\tHerbert Xu <herbert@gondor.apana.org.au>",
        "Cc": "netdev@vger.kernel.org, Mathias Krause <minipli@googlemail.com>",
        "Subject": "[PATCH net 3/4] xfrm_user: fix info leak in build_expire()",
        "Date": "Sat, 26 Aug 2017 17:08:59 +0200",
        "Message-Id": "<1503760140-9095-4-git-send-email-minipli@googlemail.com>",
        "X-Mailer": "git-send-email 1.7.10.4",
        "In-Reply-To": "<1503760140-9095-1-git-send-email-minipli@googlemail.com>",
        "References": "<1503760140-9095-1-git-send-email-minipli@googlemail.com>",
        "Sender": "netdev-owner@vger.kernel.org",
        "Precedence": "bulk",
        "List-ID": "<netdev.vger.kernel.org>",
        "X-Mailing-List": "netdev@vger.kernel.org"
    },
    "content": "The memory reserved to dump the expired xfrm state includes padding\nbytes in struct xfrm_user_expire added by the compiler for alignment. To\nprevent the heap info leak, memset(0) the remainder of the struct.\nInitializing the whole structure isn't needed as copy_to_user_state()\nalready takes care of clearing the padding bytes within the 'state'\nmember.\n\nSigned-off-by: Mathias Krause <minipli@googlemail.com>\n---\n net/xfrm/xfrm_user.c |    2 ++\n 1 file changed, 2 insertions(+)",
    "diff": "diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c\nindex c33516ef52f2..2cbdc81610c6 100644\n--- a/net/xfrm/xfrm_user.c\n+++ b/net/xfrm/xfrm_user.c\n@@ -2578,6 +2578,8 @@ static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct\n \tue = nlmsg_data(nlh);\n \tcopy_to_user_state(x, &ue->state);\n \tue->hard = (c->data.hard != 0) ? 1 : 0;\n+\t/* clear the padding bytes */\n+\tmemset(&ue->hard + 1, 0, sizeof(*ue) - offsetofend(typeof(*ue), hard));\n \n \terr = xfrm_mark_put(skb, &x->mark);\n \tif (err)\n",
    "prefixes": [
        "net",
        "3/4"
    ]
}