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=-3.8 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 C961BC4727F for ; Mon, 28 Sep 2020 07:35:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8C85C2080C for ; Mon, 28 Sep 2020 07:35:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726607AbgI1HfZ (ORCPT ); Mon, 28 Sep 2020 03:35:25 -0400 Received: from mail-io1-f80.google.com ([209.85.166.80]:41605 "EHLO mail-io1-f80.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726526AbgI1HfZ (ORCPT ); Mon, 28 Sep 2020 03:35:25 -0400 Received: by mail-io1-f80.google.com with SMTP id j4so120230iob.8 for ; Mon, 28 Sep 2020 00:35:24 -0700 (PDT) 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=CJQvC4HTF83zOtIUthVZPbqguyH85VyIuX34JkoyPQ8=; b=qMIaVjeROpT5NOJesiB8dwHfrKtKuY1xw75FhXow6D+7DK7xehT0Xjn9iYyfG1SxVs v75YAcyB3wWWWtHMYxrYMza+z94Yop9OO+T3k+l6mXxlUhedyhr8yPBzTrZZ9OGtxdcv cpH1ggj+CJ17FsVby9y9iVbWWkz44BvSQl+3fjFnpXhmmuQ4ot1p6HJSSGQflWoUhfL3 ph+7paRmpO7FvAjzKyowWr0AqBvMspTQrtu71zxBzKqRaecSYPrr3tdo5xdJZmUv+PCQ P84gOlitXEmrqmou42NG+z15BIbDrUO3iKjFtHkOpUaGVXlEH54iW8nDFR2Rbraop3rZ g0Ww== X-Gm-Message-State: AOAM5331/lFqdFe5JMmHqh3yUkgXFYZUqyEgBlb/TkA5wLJXRCk4MUMO hDoXIqvG8EaKNVubD4/LXw6EE0lzbKI/iwoT/d7IVZ61hn24 X-Google-Smtp-Source: ABdhPJwHSw48W+RND0fHB847K7SkU4zxV5vMkiMW/kbIBeVMerY/8kllZCOhccmFtlm4jE/gbEfvD81vk9/DEAxyDX04uWVTxMpv MIME-Version: 1.0 X-Received: by 2002:a05:6638:134a:: with SMTP id u10mr168048jad.88.1601278524106; Mon, 28 Sep 2020 00:35:24 -0700 (PDT) Date: Mon, 28 Sep 2020 00:35:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000009dac0205b05ab52a@google.com> Subject: general protection fault in tcf_generic_walker From: syzbot To: davem@davemloft.net, jhs@mojatatu.com, jiri@resnulli.us, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, xiyou.wangcong@gmail.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: ad2b9b0f tcp: skip DSACKs with dubious sequence ranges git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=13baee3d900000 kernel config: https://syzkaller.appspot.com/x/.config?x=5f4c828c9e3cef97 dashboard link: https://syzkaller.appspot.com/bug?extid=b47bc4f247856fb4d9e1 compiler: gcc (GCC) 10.1.0-syz 20200507 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b47bc4f247856fb4d9e1@syzkaller.appspotmail.com general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 0 PID: 22478 Comm: syz-executor.4 Not tainted 5.9.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:tcf_dump_walker net/sched/act_api.c:240 [inline] RIP: 0010:tcf_generic_walker+0x367/0xba0 net/sched/act_api.c:343 Code: 24 31 ff 48 89 de e8 b8 6c ed fa 48 85 db 74 3f e8 2e 70 ed fa 48 8d 7d 30 48 b9 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 26 07 00 00 48 8b 5d 30 31 ff 48 2b 1c 24 48 89 RSP: 0018:ffffc90006657268 EFLAGS: 00010202 RAX: 0000000000000004 RBX: c000000100004f6c RCX: dffffc0000000000 RDX: 0000000000040000 RSI: ffffffff8688ce12 RDI: 0000000000000020 RBP: fffffffffffffff0 R08: 0000000000000000 R09: ffff8880a6270207 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809d5c3d40 R13: 0000000000000000 R14: 00000000ffffffff R15: 0000000000000000 FS: 00007f9807b99700(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f01a8629db8 CR3: 00000000553cb000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tc_dump_action+0x6d5/0xe60 net/sched/act_api.c:1623 netlink_dump+0x4cd/0xf60 net/netlink/af_netlink.c:2246 __netlink_dump_start+0x643/0x900 net/netlink/af_netlink.c:2354 netlink_dump_start include/linux/netlink.h:246 [inline] rtnetlink_rcv_msg+0x70f/0xad0 net/core/rtnetlink.c:5526 netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2470 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 ____sys_sendmsg+0x331/0x810 net/socket.c:2353 ___sys_sendmsg+0xf3/0x170 net/socket.c:2407 __sys_sendmmsg+0x195/0x480 net/socket.c:2497 __do_sys_sendmmsg net/socket.c:2526 [inline] __se_sys_sendmmsg net/socket.c:2523 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2523 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e179 Code: 3d b2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0b b2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9807b98c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 0000000000027f40 RCX: 000000000045e179 RDX: 049249249249252e RSI: 0000000020000140 RDI: 0000000000000003 RBP: 000000000118cf88 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007fff4792d6cf R14: 00007f9807b999c0 R15: 000000000118cf4c Modules linked in: ---[ end trace dd2fc9d645cefc73 ]--- RIP: 0010:tcf_dump_walker net/sched/act_api.c:240 [inline] RIP: 0010:tcf_generic_walker+0x367/0xba0 net/sched/act_api.c:343 Code: 24 31 ff 48 89 de e8 b8 6c ed fa 48 85 db 74 3f e8 2e 70 ed fa 48 8d 7d 30 48 b9 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 26 07 00 00 48 8b 5d 30 31 ff 48 2b 1c 24 48 89 RSP: 0018:ffffc90006657268 EFLAGS: 00010202 RAX: 0000000000000004 RBX: c000000100004f6c RCX: dffffc0000000000 RDX: 0000000000040000 RSI: ffffffff8688ce12 RDI: 0000000000000020 RBP: fffffffffffffff0 R08: 0000000000000000 R09: ffff8880a6270207 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809d5c3d40 R13: 0000000000000000 R14: 00000000ffffffff R15: 0000000000000000 FS: 00007f9807b99700(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000016a9e60 CR3: 00000000553cb000 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.