From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1CE3AC433E6 for ; Tue, 22 Dec 2020 14:45:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E731D229C6 for ; Tue, 22 Dec 2020 14:45:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727750AbgLVOpF (ORCPT ); Tue, 22 Dec 2020 09:45:05 -0500 Received: from mail-io1-f70.google.com ([209.85.166.70]:50843 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727691AbgLVOo7 (ORCPT ); Tue, 22 Dec 2020 09:44:59 -0500 Received: by mail-io1-f70.google.com with SMTP id l5so7479814ioj.17 for ; Tue, 22 Dec 2020 06:44:43 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=lSpvPfHKy5MMJb/4IlgookwUdWGXdnIGkTfYTOdiS6s=; b=h9RaxZB/8CIu2458RwVVeGe3nSrIM1nSMgX+uqqpt8vLpUwWd4rMTvueVIo6tymDzD ofLJ8Dm83S7Xr5KL5HSL/Z5tLAPNPhXfyHxsXo5FSuB+QeuHYobKClzyyXa1NXwx+w7r Vr+BY/x9aQNcnY/n/j+BSWcizftrZ0UDim2v1FrE+mbSL6l+WSEY2IUYH6eJng4na556 2hHWNYf093jxrjKVmqbK5Pto2vchCitN+GE7opYjsH6rKAMBxy2N/p4ZxGWMMkWmKwyU qs2RrT6UQO81g15TNSAhYf6lqwpHEPypA339989D7uLq6xAUS+7YW0sJ44KipxnT2ouX sUrw== X-Gm-Message-State: AOAM532KvPkAIt4lFDyShgtEv3T91Q0OmnNFFQBSREWtvy/WFmSlWYie 1ai2RBxJDOb1nTFhO1GiwakDanjcjK6vz/YKxFAztzQBsRm7 X-Google-Smtp-Source: ABdhPJzO+Xa22wZShSH2UAxVctto7w9362EjTW8gO3kxBl/A3SQo0GbXLRlvVRAcOiX2W+A5n6C9n0E1mU/IQRkfRt8PmSs25kUX MIME-Version: 1.0 X-Received: by 2002:a92:1517:: with SMTP id v23mr21862018ilk.280.1608648258008; Tue, 22 Dec 2020 06:44:18 -0800 (PST) Date: Tue, 22 Dec 2020 06:44:18 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000fcbe0705b70e9bd9@google.com> Subject: kernel BUG at lib/string.c:LINE! (6) From: syzbot To: akpm@linux-foundation.org, coreteam@netfilter.org, davem@davemloft.net, fw@strlen.de, jakub@redhat.com, jiangshanlai@gmail.com, kadlec@netfilter.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pablo@netfilter.org, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tj@kernel.org, torvalds@linux-foundation.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: d64c6f96 Merge tag 'net-5.11-rc1' of git://git.kernel.org/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10bc5613500000 kernel config: https://syzkaller.appspot.com/x/.config?x=aca0dc5c721fe9e5 dashboard link: https://syzkaller.appspot.com/bug?extid=e86f7c428c8c50db65b4 compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=169378a7500000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=144692cb500000 The issue was bisected to: commit 2f78788b55baa3410b1ec91a576286abe1ad4d6a Author: Jakub Jelinek Date: Wed Dec 16 04:43:37 2020 +0000 ilog2: improve ilog2 for constant arguments bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1584f137500000 final oops: https://syzkaller.appspot.com/x/report.txt?x=1784f137500000 console output: https://syzkaller.appspot.com/x/log.txt?x=1384f137500000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e86f7c428c8c50db65b4@syzkaller.appspotmail.com Fixes: 2f78788b55ba ("ilog2: improve ilog2 for constant arguments") detected buffer overflow in strlen ------------[ cut here ]------------ kernel BUG at lib/string.c:1149! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8713 Comm: syz-executor731 Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:fortify_panic+0xf/0x11 lib/string.c:1149 Code: b5 78 a3 04 48 c7 c7 c0 8f c2 89 58 5b 5d 41 5c 41 5d 41 5e 41 5f e9 30 ba ee ff 48 89 fe 48 c7 c7 80 90 c2 89 e8 21 ba ee ff <0f> 0b e8 90 f9 97 f8 0f b6 f3 48 c7 c7 20 f4 10 8c e8 41 e8 fc fa RSP: 0018:ffffc900020af500 EFLAGS: 00010282 RAX: 0000000000000022 RBX: ffff888011c26768 RCX: 0000000000000000 RDX: ffff88801bad0000 RSI: ffffffff815a6925 RDI: fffff52000415e92 RBP: ffff88801be7c220 R08: 0000000000000022 R09: 0000000000000000 R10: ffffffff815a4d7b R11: 0000000000000000 R12: ffff88801180ec00 R13: ffff888011c26700 R14: 1ffff92000415ea2 R15: 0000000000000010 FS: 0000000000812880(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000006dcf60 CR3: 00000000141ee000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: strlen include/linux/string.h:325 [inline] strlcpy include/linux/string.h:348 [inline] xt_rateest_tg_checkentry+0x2a5/0x6b0 net/netfilter/xt_RATEEST.c:143 xt_check_target+0x26c/0x9e0 net/netfilter/x_tables.c:1019 check_target net/ipv6/netfilter/ip6_tables.c:529 [inline] find_check_entry.constprop.0+0x7f1/0x9e0 net/ipv6/netfilter/ip6_tables.c:572 translate_table+0xc8b/0x1750 net/ipv6/netfilter/ip6_tables.c:734 do_replace net/ipv6/netfilter/ip6_tables.c:1152 [inline] do_ip6t_set_ctl+0x553/0xb70 net/ipv6/netfilter/ip6_tables.c:1636 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x122/0x180 net/ipv6/ipv6_sockglue.c:1008 tcp_setsockopt+0x136/0x2440 net/ipv4/tcp.c:3597 __sys_setsockopt+0x2db/0x610 net/socket.c:2115 __do_sys_setsockopt net/socket.c:2126 [inline] __se_sys_setsockopt net/socket.c:2123 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2123 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4493d9 Code: e8 0c ca 02 00 48 83 c4 18 c3 0f 1f 80 00 00 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 0f 83 9b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fff679a3898 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000200002c0 RCX: 00000000004493d9 RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000006 RBP: 00007fff679a38b0 R08: 0000000000000470 R09: 00000000000000c2 R10: 0000000020000080 R11: 0000000000000246 R12: 00000000000112d5 R13: 00000000006d7dc8 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace e17a915ca7e8b666 ]--- RIP: 0010:fortify_panic+0xf/0x11 lib/string.c:1149 Code: b5 78 a3 04 48 c7 c7 c0 8f c2 89 58 5b 5d 41 5c 41 5d 41 5e 41 5f e9 30 ba ee ff 48 89 fe 48 c7 c7 80 90 c2 89 e8 21 ba ee ff <0f> 0b e8 90 f9 97 f8 0f b6 f3 48 c7 c7 20 f4 10 8c e8 41 e8 fc fa RSP: 0018:ffffc900020af500 EFLAGS: 00010282 RAX: 0000000000000022 RBX: ffff888011c26768 RCX: 0000000000000000 RDX: ffff88801bad0000 RSI: ffffffff815a6925 RDI: fffff52000415e92 RBP: ffff88801be7c220 R08: 0000000000000022 R09: 0000000000000000 R10: ffffffff815a4d7b R11: 0000000000000000 R12: ffff88801180ec00 R13: ffff888011c26700 R14: 1ffff92000415ea2 R15: 0000000000000010 FS: 0000000000812880(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000006dcf60 CR3: 00000000141ee000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches