From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f208.google.com (mail-il1-f208.google.com [209.85.166.208]) (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 5CBC123D7CA for ; Fri, 12 Sep 2025 07:06:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757660792; cv=none; b=RQh0HMKtj10nJBKaxdO84+3gGzr5CuBhAvkKQWzH0erGUdQTHxh0BMbyxGYMRybQlILEaFYde/A1KsFv3HU7li1eBVUhSTHCMasCR6NgmpC0LwLiGPEFtp4Fl+XLKDmSKg6Ru9gkMv1fq2dUinOsfPBGeWBeDv1A5YeOaep/YQg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757660792; c=relaxed/simple; bh=RwHOLyhs5q8fB4z9idz6A/n+Ucus3xYu6vE3rzPaEfU=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=o2Id8biPWlxF8pYmtHPGhYG8OP845dE+FlA25LQ5Pv67P4X+T0REeFHDWwdfk+RS7bSQ77jxyIn51l7qdxo0f/xAd/1aZZKNUKQkjsycC21ktQJPXHjdU2pai3MeXGpzJSDkW3oCmhxGi8p4K9Hs4C5XU9jGD3uaEm9OJQENbaU= 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=209.85.166.208 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-il1-f208.google.com with SMTP id e9e14a558f8ab-406d2dab9b0so23709685ab.3 for ; Fri, 12 Sep 2025 00:06:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757660789; x=1758265589; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=lg7ihBhpULDxOBRw5vjahIiuuwSlCIhJvniZyUe7xQU=; b=svphAbjvTLsOQmaEzMuoj2FIw+F0eFwImFE+4A5HRqr4sglzQ2UTUaGmhFuhr8I0mY snTioQ0SHjAcdX9qyRVWNNRWBHv82lvdFbXliJrMk0OirXbig2zC5j6V/kCnJohNZDAW RX3DXk3h4gQmUKFXVfRkZAfSWhehihh1nXAz338qtCuAVqfwKQEEh/NVY43cs/oqV0lz kNwpIpDrM3ZtaEagYpdAMlCbwv1Kl5wr52k7COdntcGmYwMTmMB8VezIsBUlmmLmtApb oUn5r6joUdm0U+VdoHqkshsWe9tFhqOLuW7YyZDp7UhiENGvwASXOEz+qEfzKoVkqmnV fRTQ== X-Forwarded-Encrypted: i=1; AJvYcCXpgz0vahRE/12et8E5J9I/ebh6Cgo9nsThJLj0CBxyD+lo0d81ZDdwJd5oDcTPMSDoJinthzo=@vger.kernel.org X-Gm-Message-State: AOJu0YxRYCJvX3OOZ6Q0oisEEurCjX0UXNLxvbQzwVltKo/Jl2cWV27l 6LQZXSmd64ovdzjcAI3oPL6IFxdaMZpxCn4n4mAfJ1Au5QBMb0IX9oI71jaMlj/8pdCn818fEV0 fEMjB08zNjlv4FL+FV5cit+JDCaQS2Ie64W71qMa7qWuEjwkRGMEJNBt4zpk= X-Google-Smtp-Source: AGHT+IGIVGU1dUETB6N5aiBqc/hnnsefPsTbymdoGA7QbpDBRHggxm8iX2/+W+qLKreBp4CKNdD4ULo6KEh/w3zy6CxlBL99+ltO Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a2c:b0:40c:50c:376 with SMTP id e9e14a558f8ab-420a4c0378bmr29448695ab.26.1757660789612; Fri, 12 Sep 2025 00:06:29 -0700 (PDT) Date: Fri, 12 Sep 2025 00:06:29 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68c3c675.050a0220.2ff435.0353.GAE@google.com> Subject: [syzbot] [net?] BUG: corrupted list in flow_block_cb_setup_simple From: syzbot To: davem@davemloft.net, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: e59a039119c3 Merge tag 's390-6.17-4' of git://git.kernel.o.. git tree: bpf console output: https://syzkaller.appspot.com/x/log.txt?x=1523e934580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4d8792ecb6308d0f dashboard link: https://syzkaller.appspot.com/bug?extid=5a66db916cdde0dbcc1c compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16d4bd62580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10d69642580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/324da524bbd8/disk-e59a0391.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0fa38e1d54f4/vmlinux-e59a0391.xz kernel image: https://storage.googleapis.com/syzbot-assets/b1ea8074daa0/bzImage-e59a0391.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5a66db916cdde0dbcc1c@syzkaller.appspotmail.com non-slab/vmalloc memory list_del corruption. prev->next should be ffff888077fdb100, but was ffffffff8edac9a0. (prev=ffffffff8edac9a0) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:64! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 6449 Comm: syz.3.301 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:__list_del_entry_valid_or_report+0x15a/0x190 lib/list_debug.c:62 Code: e8 4b a5 31 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 1c 9d 52 fd 49 8b 17 48 c7 c7 a0 40 e3 8b 48 89 de 4c 89 f9 e8 07 0b 57 fc 90 <0f> 0b 4c 89 f7 e8 1c a5 31 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 ed RSP: 0018:ffffc90003f4e760 EFLAGS: 00010246 RAX: 000000000000006d RBX: ffff888077fdb100 RCX: 21dc4908dd936700 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 1ffff920007e9d3e R08: ffffc90003f4e487 R09: 1ffff920007e9c90 R10: dffffc0000000000 R11: fffff520007e9c91 R12: 1ffffffff1db5934 R13: dffffc0000000000 R14: ffffffff8edac9a0 R15: ffffffff8edac9a0 FS: 00005555769e1500(0000) GS:ffff888125c15000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000380 CR3: 0000000030806000 CR4: 00000000003526f0 Call Trace: __list_del_entry_valid include/linux/list.h:124 [inline] __list_del_entry include/linux/list.h:215 [inline] list_del include/linux/list.h:229 [inline] flow_block_cb_setup_simple+0x62d/0x740 net/core/flow_offload.c:369 nft_block_offload_cmd net/netfilter/nf_tables_offload.c:397 [inline] nft_chain_offload_cmd+0x290/0x660 net/netfilter/nf_tables_offload.c:451 nft_flow_block_chain net/netfilter/nf_tables_offload.c:471 [inline] nft_flow_offload_chain net/netfilter/nf_tables_offload.c:513 [inline] nft_flow_rule_offload_commit+0x40d/0x1b60 net/netfilter/nf_tables_offload.c:592 nf_tables_commit+0x675/0x8700 net/netfilter/nf_tables_api.c:10933 nfnetlink_rcv_batch net/netfilter/nfnetlink.c:574 [inline] nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:647 [inline] nfnetlink_rcv+0x1a4e/0x2520 net/netfilter/nfnetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x219/0x270 net/socket.c:729 ____sys_sendmsg+0x505/0x830 net/socket.c:2614 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668 __sys_sendmsg net/socket.c:2700 [inline] __do_sys_sendmsg net/socket.c:2705 [inline] __se_sys_sendmsg net/socket.c:2703 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2703 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe1b0d8eba9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc23fb3798 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fe1b0fd5fa0 RCX: 00007fe1b0d8eba9 RDX: 000000000000c050 RSI: 0000200000000cc0 RDI: 0000000000000003 RBP: 00007fe1b0e11e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe1b0fd5fa0 R14: 00007fe1b0fd5fa0 R15: 0000000000000003 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid_or_report+0x15a/0x190 lib/list_debug.c:62 Code: e8 4b a5 31 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 1c 9d 52 fd 49 8b 17 48 c7 c7 a0 40 e3 8b 48 89 de 4c 89 f9 e8 07 0b 57 fc 90 <0f> 0b 4c 89 f7 e8 1c a5 31 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 ed RSP: 0018:ffffc90003f4e760 EFLAGS: 00010246 RAX: 000000000000006d RBX: ffff888077fdb100 RCX: 21dc4908dd936700 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 1ffff920007e9d3e R08: ffffc90003f4e487 R09: 1ffff920007e9c90 R10: dffffc0000000000 R11: fffff520007e9c91 R12: 1ffffffff1db5934 R13: dffffc0000000000 R14: ffffffff8edac9a0 R15: ffffffff8edac9a0 FS: 00005555769e1500(0000) GS:ffff888125c15000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000380 CR3: 0000000030806000 CR4: 00000000003526f0 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup