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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 DEE01C43382 for ; Wed, 26 Sep 2018 07:49:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6E23B20843 for ; Wed, 26 Sep 2018 07:49:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6E23B20843 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727406AbeIZOAn (ORCPT ); Wed, 26 Sep 2018 10:00:43 -0400 Received: from mail-it1-f197.google.com ([209.85.166.197]:52428 "EHLO mail-it1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726638AbeIZOAl (ORCPT ); Wed, 26 Sep 2018 10:00:41 -0400 Received: by mail-it1-f197.google.com with SMTP id e9-v6so2111573itf.2 for ; Wed, 26 Sep 2018 00:49:04 -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=K3w9qSZxaKB4Z/XRI9rADPLf7exWPkmmorsjYnJ/yYI=; b=G15opQxD9RLDliY4M+k7VByD7qg2k4IcFS24kGHTPDnsAqU0OKP+iTaBTc/nDvCdaO ew3gJX+4i8UozaIvTeFD95O08iVKHNrtImHcEL81XKZfDKzRUC2HmV6h/z7oAHaRCqv1 FiaM+8lE9m+fgQDaGNoCAILejKIQrOZcRv6ou5oYGBToI3uxS6Qv3k5N/lym8LlpeK+P CAHXaAj0t0DxH66p0F4pFt7jEq2KAJFC5yszzAFhuAmKGz7nVjtiJfm6fkNGd/rRYV+x Y+jJsM8ctGnRRmQHRQajmviKigzc4MMpsYz56ux0gMWZy7zHD3oaLmSmAGi49IwZV1LY otNw== X-Gm-Message-State: ABuFfojnxijsH2+NEZpmD737pVuHe6rQpUT6V1avADvKuye72tnUH5/X vsz9oa7myQ4QQKWrSgwe+r8E1tERy6vw8Zj474mnMX05KG+d X-Google-Smtp-Source: ACcGV61YopYHZIQcOlvbn5KU/fJNBH0HoM//OTL8KFAY8OzZhYoy/CB543MAKjM7/CkHlv8Y7gEJp6pZBkm38OFiHD7cTQllrNxw MIME-Version: 1.0 X-Received: by 2002:a24:68c6:: with SMTP id v189-v6mr3298253itb.11.1537948143887; Wed, 26 Sep 2018 00:49:03 -0700 (PDT) Date: Wed, 26 Sep 2018 00:49:03 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ccb25d0576c17446@google.com> Subject: KASAN: slab-out-of-bounds Read in tls_push_record From: syzbot To: aviadye@mellanox.com, borisp@mellanox.com, davejwatson@fb.com, davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 739d0def85ca Merge branch 'hv_netvsc-Support-LRO-RSC-in-th.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=13aa179e400000 kernel config: https://syzkaller.appspot.com/x/.config?x=e79b9299baeb2298 dashboard link: https://syzkaller.appspot.com/bug?extid=942a1909765f0413329b compiler: gcc (GCC) 8.0.1 20180413 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+942a1909765f0413329b@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in sg_mark_end include/linux/scatterlist.h:195 [inline] BUG: KASAN: slab-out-of-bounds in tls_push_record+0x1243/0x1330 net/tls/tls_sw.c:521 Read of size 8 at addr ffff8801a4d235f8 by task syz-executor1/7668 CPU: 1 PID: 7668 Comm: syz-executor1 Not tainted 4.19.0-rc4+ #228 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.9+0x242/0x309 mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 sg_mark_end include/linux/scatterlist.h:195 [inline] tls_push_record+0x1243/0x1330 net/tls/tls_sw.c:521 tls_sw_push_pending_record+0x22/0x30 net/tls/tls_sw.c:558 tls_handle_open_record net/tls/tls_main.c:155 [inline] tls_sk_proto_close+0x439/0x750 net/tls/tls_main.c:272 inet_release+0x104/0x1f0 net/ipv4/af_inet.c:428 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:458 __sock_release+0xd7/0x250 net/socket.c:579 sock_close+0x19/0x20 net/socket.c:1141 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411151 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007fff8ba9e200 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411151 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: 00007fff8ba9e130 R11: 0000000000000293 R12: 000000000000000f R13: 0000000000086e3d R14: 0000000000000412 R15: badc0ffeebadface Allocated by task 0: (stack is not available) Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8801a4d22d80 which belongs to the cache kmalloc-2048 of size 2048 The buggy address is located 120 bytes to the right of 2048-byte region [ffff8801a4d22d80, ffff8801a4d23580) The buggy address belongs to the page: page:ffffea0006934880 count:1 mapcount:0 mapping:ffff8801da800c40 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea000717fd08 ffff8801da801948 ffff8801da800c40 raw: 0000000000000000 ffff8801a4d22500 0000000100000003 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801a4d23480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801a4d23500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8801a4d23580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801a4d23600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801a4d23680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot.