From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f199.google.com (mail-oi1-f199.google.com [209.85.167.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2665C392C2C for ; Tue, 15 Sep 2026 01:38:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789436330; cv=none; b=lakrTA882E2RRt1/3XpJ9Wk8Gj4pt/SlqlLnXSzS7l53+Znb0F9afods4FxvCFV2c10CvgVpSAj09SFsa/xBEYPE6Xa0VX5DN8pvFKoAQc8/dv8TTg2PuqhslRYwtVBsFXorVCx77Un9MkhJ4c2WsZsebq/TNllUew5Qh2gh1kk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789436330; c=relaxed/simple; bh=MPkdKKU/7GUG2aXSqsI6wgbkgwkvax2NhB9XOBGUO7Y=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=GvipgoUanhdalZv9yvIbkSF0AXXM2Y/XDkDtICe1PRLQQJLqVbGdbdgh6t5zutKs8lCZEFIUMpzyZHCj8CfP52Q3cCgQQWUef7jlnfByg6EvCbJJSYGOJW9cYmjKqHDhdrBf4KLdVT3/Iqpg4zHJUZCZBMd3q3VNhgYE0on7ywg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.167.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi1-f199.google.com with SMTP id 5614622812f47-48e5de5a23cso5578197b6e.0 for ; Mon, 14 Sep 2026 18:38:48 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789436328; x=1790041128; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=SK8Up1k6e9dMSamna4ssit4ZSwewHiMfuuR+D6fsW7o=; b=OiL+dV5KX1A4fb8ATxTMKYE+IRFoRGEgCuvFuiCUG+OSVt56dgJ3zVIIt3TrOHxHXJ /Emxz1LLdANduECtVwCNi84o5uO4Ari+0VT9/BW/ZVywj4DMKwVSCrJlWGzq9O/8QYcw ddQSTXAoKhpM/+ZH8cJaRYZudGibfCxqAMhO4PjhNZyp3+dX7XMDlFAlAEW0O+FM3mPu hfZjNQuepYXxy/u6zZck8P7b/es06GGQ1ElzZA7E8hNoND1tE4FhesAwCRpi6+rXZ1NA CZAa0ugG/lHL2nejnp37M6y7I55t4wCdmgFN1MEZ5PSVn+x4d541SK5qHGI0OZeA/9L1 l88w== X-Gm-Message-State: AFuF++nrk/+3KbHkhLy9+QS0bg8S2NaZsIotusXMvpubY07MLGIpwTZJ rBDSk0lwLLoC9TMbcMSiH8wou5x3TfUZ6gSnrhzoqcP5zeHWBqBlFgZIuAdqKmgCU8125rPaVO6 sq4XKwqMVHW0xNKXHGn8SRisDzv9Vi1QP5cb/xg+YLE3nEZ7Gqj53Z0pakvQ= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:ec49:0:b0:6c1:f832:9b45 with SMTP id 006d021491bc7-6c54214a0e7mr4977457eaf.25.1789436327830; Mon, 14 Sep 2026 18:38:47 -0700 (PDT) Date: Mon, 14 Sep 2026 18:38:47 -0700 In-Reply-To: <6aa60ec9.f81106d8.2ab401.0032.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6aa8a1a7.4c28b7d0.c1bba.002a.GAE@google.com> Subject: Forwarded: [PATCH] WARNING in batadv_iv_ogm_process_per_outif From: syzbot To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: [PATCH] WARNING in batadv_iv_ogm_process_per_outif Author: jchuang26@m.fudan.edu.cn #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master Reported-by: syzbot+a079f084653164a652d1@syzkaller.appspotmail.com diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index 53fbdbbe8..24ea350cd 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -1410,9 +1410,13 @@ batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, return BATADV_NO_DUP; orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); - if (WARN_ON(!orig_ifinfo)) { + if (!orig_ifinfo) { + /* The GFP_ATOMIC allocation inside batadv_orig_ifinfo_new() + * may fail under memory pressure. That is not a kernel bug, + * so don't WARN; just skip duplicate detection. + */ batadv_orig_node_put(orig_node); - return 0; + return BATADV_NO_DUP; } spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock);