From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f71.google.com (mail-oo1-f71.google.com [209.85.161.71]) (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 B97282E9ED6 for ; Wed, 20 May 2026 06:23:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779258240; cv=none; b=lRY5GhQTKtG83vBlbNisDW83L4YbvYGyZ2yEQghXVSksG7PkDirs5T/hSxS7c3b3rdWqJ/uCOgsjlP0wQg25SA7R46qP81sOABQEOOVu2sA699Sq099H0/5TkikAgLc+kpIGLTDBnHJjHsB9fCxV58rtb3Euyuz23EpbYdW2MMI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779258240; c=relaxed/simple; bh=uyBKFyUrE1l76t2fcs8Mt+PN9hBLdb1uJgoy70DmMjI=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=EQBKnsEF41SRi2JSXcRItIKwhOzwGF3vN8Wgt2acR5DL8yU+AyR0WbWYjHUgkTj/a6tM3J6sCnCHo9zAl0G73zR511dLvxnLmZKd8NbYZ8bkDVBYru4q4mUacZ873OJfdZubtS6IKwLJEFJX2771CmhRvCQkA7j0HNvzYLyWBqY= 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=209.85.161.71 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-oo1-f71.google.com with SMTP id 006d021491bc7-6948d83a5c0so13343961eaf.1 for ; Tue, 19 May 2026 23:23:58 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779258237; x=1779863037; h=cc:to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=p9LDCa34YdUZJw8O0LeNNzPHhjPn/bOCsB3XLuXMIaA=; b=hhscmRJQ2ubHI2Dzn9zfBA11qjy9946hCfx1n+bGooQ2PLQ/fiU6HAfE9D8DH89ECq YOmojv1VDoHVSV3+oLevIAbX/MIJcIxlP3eKI+aNXACV3wQ1LvWhjjpFegDZX4GoY5Vt sg8gZv8dZD7KJBd7GL2PaizfP2uiuzmOH8sg77Hs7R4Pwmy3mKTyW3clPG5th745gbN1 UwsUTHNsFICZ+Z/lOvJnfLRM1xozAccAhD22/gOrw5I2Du7ZdFBuvIKymKF4JTFlNM+K MntbdNV13mWseaK3dU2yfM8MJ5bkdjUctKymE6JNYBISFe75QFXdxvYKIkgGJZqsMh95 KnKg== X-Gm-Message-State: AOJu0Yx5Rx5AhU8p5lJdPqHs/WOJ80gqJqsLlcwDkm6RalgskGEV8dx8 7ERErogiQbEHMvDc3/L1vI8cnAacdcWIjuGWSO7bDcEDFaX0QdFdyliuBHsxgll3+Y+u645fJ9d pLNpE4pjyk1gKWnuI053/w869eHRJmQq/cOVEIdWC6IrNdn3cZZLCdBaGo84= Precedence: bulk X-Mailing-List: syzbot@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:151f:b0:694:a339:43af with SMTP id 006d021491bc7-69c9436974amr14921997eaf.28.1779258237681; Tue, 19 May 2026 23:23:57 -0700 (PDT) Date: Tue, 19 May 2026 23:23:57 -0700 In-Reply-To: <20260519213826.1181661-1-pablo@netfilter.org> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a0d537d.a70a0220.1a69d3.001e.GAE@google.com> Subject: [syzbot ci] Re: netfilter: nfnetlink_cthelper: use {READ,WRITE}_ONCE for accessing helper flags From: syzbot ci To: netfilter-devel@vger.kernel.org, pablo@netfilter.org Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot ci has tested the following series [v1] netfilter: nfnetlink_cthelper: use {READ,WRITE}_ONCE for accessing helper flags https://lore.kernel.org/all/20260519213826.1181661-1-pablo@netfilter.org * [PATCH nf 1/7] netfilter: nfnetlink_cthelper: use {READ,WRITE}_ONCE for accessing helper flags * [PATCH nf 2/7] netfilter: conntrack: add dead flag to helpers * [PATCH nf 3/7] netfilter: nf_conntrack_helper: add null check in nfct_help_data() calls * [PATCH nf 4/7] netfilter: conntrack: add null check in nfct_help() calls * [PATCH nf 5/7] netfilter: conntrack: add nf_ct_iterate_destroy_net() * [PATCH nf 6/7] netfilter: nf_conntrack_timeout: use nf_ct_iterate_destroy() to cleanup timeout going away * [PATCH nf 7/7] netfilter: xt_CT: fix race with rule removal and nfnetlink_queue and found the following issue: WARNING in xt_ct_tg_check Full report is available here: https://ci.syzbot.org/series/c356956d-b1f6-4d7e-be26-6cf68d49814e *** WARNING in xt_ct_tg_check tree: nf URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netfilter/nf.git base: 2beba18b0160446463bf1dbd749324846db98493 arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/45c49e4e-439a-4d11-bc9a-3c3a5077f679/config syz repro: https://ci.syzbot.org/findings/9cfb9381-576b-4a17-a156-68641410fec2/syz_repro No such timeout policy "syz1" ------------[ cut here ]------------ help WARNING: net/netfilter/xt_CT.c:226 at xt_ct_tg_check+0x814/0xa90 net/netfilter/xt_CT.c:226, CPU#1: syz.0.17/5870 Modules linked in: CPU: 1 UID: 0 PID: 5870 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:xt_ct_tg_check+0x814/0xa90 net/netfilter/xt_CT.c:226 Code: c7 c7 c0 a7 e6 8c e8 eb 33 3e f7 e9 12 ff ff ff e8 01 4b dc f7 48 c7 c7 40 a8 e6 8c 4c 89 ee e8 d2 33 3e f7 e9 f9 fe ff ff 90 <0f> 0b 90 4c 89 e0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 e7 e8 73 RSP: 0018:ffffc900036ef6e0 EFLAGS: 00010282 RAX: ffff88812063bd10 RBX: 1ffff920006ddee4 RCX: 0000000000000010 RDX: ffff88812063bd00 RSI: 0000000000000002 RDI: 0000000000000002 RBP: ffffc900036ef7b0 R08: ffffffff90316c23 R09: 1ffffffff2062d84 R10: dffffc0000000000 R11: fffffbfff2062d85 R12: ffff88812063bd10 R13: 00000000fffffffe R14: ffff888113ee1800 R15: dffffc0000000000 FS: 00007fd41ea436c0(0000) GS:ffff8882a928a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd41da72780 CR3: 0000000175cc8000 CR4: 00000000000006f0 Call Trace: xt_checkentry_target net/netfilter/x_tables.c:1115 [inline] xt_check_target+0x61a/0xca0 net/netfilter/x_tables.c:1138 check_target net/ipv4/netfilter/ip_tables.c:510 [inline] find_check_entry net/ipv4/netfilter/ip_tables.c:552 [inline] translate_table+0x1881/0x2110 net/ipv4/netfilter/ip_tables.c:716 do_replace net/ipv4/netfilter/ip_tables.c:1137 [inline] do_ipt_set_ctl+0x9f5/0xe00 net/ipv4/netfilter/ip_tables.c:1635 nf_setsockopt+0x26f/0x290 net/netfilter/nf_sockopt.c:101 do_sock_setsockopt+0x17c/0x1b0 net/socket.c:2381 __sys_setsockopt net/socket.c:2406 [inline] __do_sys_setsockopt net/socket.c:2412 [inline] __se_sys_setsockopt net/socket.c:2409 [inline] __x64_sys_setsockopt+0x13d/0x1b0 net/socket.c:2409 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd41db9ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd41ea43028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fd41de15fa0 RCX: 00007fd41db9ce59 RDX: 0000000000000040 RSI: 8001000000000000 RDI: 0000000000000003 RBP: 00007fd41dc32d6f R08: 00000000000002a8 R09: 0000000000000000 R10: 0000200000001500 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd41de16038 R14: 00007fd41de15fa0 R15: 00007ffdb7f510f8 *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com. To test a patch for this bug, please reply with `#syz test` (should be on a separate line). The patch should be attached to the email. Note: arguments like custom git repos and branches are not supported.