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GET /api/patches/2216191/?format=api
{ "id": 2216191, "url": "http://patchwork.ozlabs.org/api/patches/2216191/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/patch/20260326005129.535152-3-tim.whisonant@canonical.com/", "project": { "id": 15, "url": "http://patchwork.ozlabs.org/api/projects/15/?format=api", "name": "Ubuntu Kernel", "link_name": "ubuntu-kernel", "list_id": "kernel-team.lists.ubuntu.com", "list_email": "kernel-team@lists.ubuntu.com", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260326005129.535152-3-tim.whisonant@canonical.com>", "list_archive_url": null, "date": "2026-03-26T00:51:26", "name": "[SRU,Q,1/1] netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "979d0cbd1eb979ef0c661bd8fb83df504c97e427", "submitter": { "id": 89903, "url": "http://patchwork.ozlabs.org/api/people/89903/?format=api", "name": "Tim Whisonant", "email": "tim.whisonant@canonical.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/ubuntu-kernel/patch/20260326005129.535152-3-tim.whisonant@canonical.com/mbox/", "series": [ { "id": 497523, "url": "http://patchwork.ozlabs.org/api/series/497523/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/list/?series=497523", "date": "2026-03-26T00:51:24", "name": "CVE-2026-23274", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/497523/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2216191/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2216191/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<kernel-team-bounces@lists.ubuntu.com>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (4096-bit key;\n unprotected) header.d=canonical.com header.i=@canonical.com\n header.a=rsa-sha256 header.s=20251003 header.b=XITbdoEd;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; 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charset=\"utf-8\"", "Content-Transfer-Encoding": "base64", "Errors-To": "kernel-team-bounces@lists.ubuntu.com", "Sender": "\"kernel-team\" <kernel-team-bounces@lists.ubuntu.com>" }, "content": "From: Yuan Tan <tanyuan98@outlook.com>\n\nIDLETIMER revision 0 rules reuse existing timers by label and always call\nmod_timer() on timer->timer.\n\nIf the label was created first by revision 1 with XT_IDLETIMER_ALARM,\nthe object uses alarm timer semantics and timer->timer is never initialized.\nReusing that object from revision 0 causes mod_timer() on an uninitialized\ntimer_list, triggering debugobjects warnings and possible panic when\npanic_on_warn=1.\n\nFix this by rejecting revision 0 rule insertion when an existing timer with\nthe same label is of ALARM type.\n\nFixes: 68983a354a65 (\"netfilter: xtables: Add snapshot of hardidletimer target\")\nCo-developed-by: Yifan Wu <yifanwucs@gmail.com>\nSigned-off-by: Yifan Wu <yifanwucs@gmail.com>\nCo-developed-by: Juefei Pu <tomapufckgml@gmail.com>\nSigned-off-by: Juefei Pu <tomapufckgml@gmail.com>\nSigned-off-by: Yuan Tan <tanyuan98@outlook.com>\nSigned-off-by: Xin Liu <dstsmallbird@foxmail.com>\nSigned-off-by: Florian Westphal <fw@strlen.de>\n(cherry picked from commit 329f0b9b48ee6ab59d1ab72fef55fe8c6463a6cf)\nCVE-2026-23274\nSigned-off-by: Tim Whisonant <tim.whisonant@canonical.com>\n---\n net/netfilter/xt_IDLETIMER.c | 6 ++++++\n 1 file changed, 6 insertions(+)", "diff": "diff --git a/net/netfilter/xt_IDLETIMER.c b/net/netfilter/xt_IDLETIMER.c\nindex d73957592c9d9..bb7af92ac82a4 100644\n--- a/net/netfilter/xt_IDLETIMER.c\n+++ b/net/netfilter/xt_IDLETIMER.c\n@@ -318,6 +318,12 @@ static int idletimer_tg_checkentry(const struct xt_tgchk_param *par)\n \n \tinfo->timer = __idletimer_tg_find_by_label(info->label);\n \tif (info->timer) {\n+\t\tif (info->timer->timer_type & XT_IDLETIMER_ALARM) {\n+\t\t\tpr_debug(\"Adding/Replacing rule with same label and different timer type is not allowed\\n\");\n+\t\t\tmutex_unlock(&list_mutex);\n+\t\t\treturn -EINVAL;\n+\t\t}\n+\n \t\tinfo->timer->refcnt++;\n \t\tmod_timer(&info->timer->timer,\n \t\t\t secs_to_jiffies(info->timeout) + jiffies);\n", "prefixes": [ "SRU", "Q", "1/1" ] }