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=1.8 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SORTED_RECIPS,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 85D4AC43142 for ; Thu, 2 Aug 2018 13:05:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3B4A321501 for ; Thu, 2 Aug 2018 13:05:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3B4A321501 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 S1732532AbeHBO4K (ORCPT ); Thu, 2 Aug 2018 10:56:10 -0400 Received: from mail-it0-f71.google.com ([209.85.214.71]:58572 "EHLO mail-it0-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732518AbeHBO4J (ORCPT ); Thu, 2 Aug 2018 10:56:09 -0400 Received: by mail-it0-f71.google.com with SMTP id y13-v6so2054101ita.8 for ; Thu, 02 Aug 2018 06:05:02 -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=bMP95q4QMGCiExrL7Vbxs89heiCIWAvl9nYCQA8m6Kk=; b=szO8SAUMXxDGZV87xSloj/+pV8v9N5LXt9CB+ocPeP/mxUQ2kIdQqrbogYovgIP2vE 5KALXwioom1IwQk+2R15WgUayVX2veD5aMoxlXqkUJlWrhNEqj4FdBQpcafgVGt0760a lK3/KoH0kD9gE9jxojjj8x8f2xSdX+AedsCPE2AibOlMvlHzGskofRJnbZ+OUoq6yIbV lTmruLl0Qj3RzlV0sdrp3OWTvvAv1u1OmK4PrWXSSYzb73djLIcaJqFqly7HjNN7Czs5 7S7CxrfS+UkO1gi+RxJj6lz/LBgaP5h/ooszEKwnivquT7jjAW4WdZIyrN36Bzo+Z0G8 EIMw== X-Gm-Message-State: AOUpUlEcB6wZnOoGlk5PXzo3gqPfGzuAB0DjjeYDV9JxA/y9pR17qEWz FL9slzu+wiq9t7x418AKOHrS5zahuneDGQi4gACN9vzHROvF X-Google-Smtp-Source: AAOMgpecaJLJyWXaxEDD+kwI7otyk9ydzsqcdIOeUB2dnrKd9dclFX99edS/kNd1riCkFI+gT1lr//F7Dr8hq5pHEDzSDRket7C+ MIME-Version: 1.0 X-Received: by 2002:a6b:2712:: with SMTP id n18-v6mr1098728ion.90.1533215102186; Thu, 02 Aug 2018 06:05:02 -0700 (PDT) Date: Thu, 02 Aug 2018 06:05:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000087c36f05727375d2@google.com> Subject: KASAN: slab-out-of-bounds Write in tls_push_record (2) 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: 44960f2a7b63 staging: ashmem: Fix SIGBUS crash when traver.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10f7ea72400000 kernel config: https://syzkaller.appspot.com/x/.config?x=2dc0cd7c2eefb46f dashboard link: https://syzkaller.appspot.com/bug?extid=3d650eba9d63b8de7478 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+3d650eba9d63b8de7478@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in tls_fill_prepend include/net/tls.h:339 [inline] BUG: KASAN: slab-out-of-bounds in tls_push_record+0x1091/0x1400 net/tls/tls_sw.c:239 Write of size 1 at addr ffff88019c5d8000 by task syz-executor2/11760 CPU: 0 PID: 11760 Comm: syz-executor2 Not tainted 4.18.0-rc7+ #172 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+0x1c9/0x2b4 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 __asan_report_store1_noabort+0x17/0x20 mm/kasan/report.c:435 tls_fill_prepend include/net/tls.h:339 [inline] tls_push_record+0x1091/0x1400 net/tls/tls_sw.c:239 tls_sw_push_pending_record+0x22/0x30 net/tls/tls_sw.c:276 tls_handle_open_record net/tls/tls_main.c:164 [inline] tls_sk_proto_close+0x74c/0xae0 net/tls/tls_main.c:264 inet_release+0x104/0x1f0 net/ipv4/af_inet.c:427 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:459 __sock_release+0xd7/0x260 net/socket.c:600 sock_close+0x19/0x20 net/socket.c:1151 __fput+0x355/0x8b0 fs/file_table.c:209 ____fput+0x15/0x20 fs/file_table.c:243 task_work_run+0x1ec/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:192 [inline] exit_to_usermode_loop+0x313/0x370 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: 0033:0x4105c1 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:0000000000a3feb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000014 RCX: 00000000004105c1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000a3fde0 R11: 0000000000000293 R12: 0000000000000000 R13: 000000000002fd87 R14: 0000000000000094 R15: badc0ffeebadface Allocated by task 2597: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc+0x12e/0x760 mm/slab.c:3554 getname_flags+0xd0/0x5a0 fs/namei.c:140 user_path_at_empty+0x2d/0x50 fs/namei.c:2584 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x129/0x210 fs/stat.c:185 vfs_stat include/linux/fs.h:3102 [inline] __do_sys_newstat+0x8f/0x110 fs/stat.c:337 __se_sys_newstat fs/stat.c:333 [inline] __x64_sys_newstat+0x54/0x80 fs/stat.c:333 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 2597: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kmem_cache_free+0x86/0x2d0 mm/slab.c:3756 putname+0xf2/0x130 fs/namei.c:261 filename_lookup+0x397/0x510 fs/namei.c:2330 user_path_at_empty+0x40/0x50 fs/namei.c:2584 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x129/0x210 fs/stat.c:185 vfs_stat include/linux/fs.h:3102 [inline] __do_sys_newstat+0x8f/0x110 fs/stat.c:337 __se_sys_newstat fs/stat.c:333 [inline] __x64_sys_newstat+0x54/0x80 fs/stat.c:333 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff88019c5d8980 which belongs to the cache names_cache of size 4096 The buggy address is located 2432 bytes to the left of 4096-byte region [ffff88019c5d8980, ffff88019c5d9980) The buggy address belongs to the page: page:ffffea0006717600 count:1 mapcount:0 mapping:ffff8801dad85dc0 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea0006470d88 ffffea0006717688 ffff8801dad85dc0 raw: 0000000000000000 ffff88019c5d8980 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88019c5d7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88019c5d7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ffff88019c5d8000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88019c5d8080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88019c5d8100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- 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.