From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp.codeaurora.org by pdx-caf-mail.web.codeaurora.org (Dovecot) with LMTP id RIBTCOzBHFuxdQAAmS7hNA ; Sun, 10 Jun 2018 06:15:08 +0000 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 015D160795; Sun, 10 Jun 2018 06:15:07 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=0.6 required=2.0 tests=BAYES_00,FROM_LOCAL_HEX, HEXHASH_WORD,MAILING_LIST_MULTI,SORTED_RECIPS autolearn=no autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by smtp.codeaurora.org (Postfix) with ESMTP id 432E5605A5; Sun, 10 Jun 2018 06:15:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 432E5605A5 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753761AbeFJGPF (ORCPT + 25 others); Sun, 10 Jun 2018 02:15:05 -0400 Received: from mail-it0-f72.google.com ([209.85.214.72]:44095 "EHLO mail-it0-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753669AbeFJGPD (ORCPT ); Sun, 10 Jun 2018 02:15:03 -0400 Received: by mail-it0-f72.google.com with SMTP id 202-v6so6261555itw.9 for ; Sat, 09 Jun 2018 23:15:03 -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=Ev+bgdIkRKiqynULoi0QZk4wgozqT6rxIjrRZ+J15SY=; b=Ilwgs6wG+LZMn25uBJCkymgwdinWn3iRZNZI1Ec0gsDsbr27V1rpDpxsRynsZYw+Fi nrDNSFk+Mxi8myoe1mBWVUp8lvcTUpf+q33DrhalihXDQEUmZgZfFtGl46iEuOq1C5CE PAsf9anDS7Gzgu50EwAbuExAs+eHaQmtpHp2M5SMicEpsklteZMhRPigCVhyhFYMQE+C dMhMzDMO7qZmDjdAiBoEUJ5WVltdiodvkE9eVo79Z7Wz3kLgZOQyjrbxyEJDoKx38g/a 7HxqcgSf0Gj+GruFShHyJ18ZvCaWpZZQousohkeU7AV7nQtqRycyUZptWCLj/y2oplE/ jfAA== X-Gm-Message-State: APt69E0kcEvfNB6rOjTgMO+7tzuM03xTKvUqGm9kmHiik00xoSZbs1YE Q4PHQbZAxbX4G+LC6K5fhjenx0djhyu3sh5wIw/SYrNHHvxn X-Google-Smtp-Source: ADUXVKJ13CSPkH6Bigrc0b9cKRTd2KM84OIaY/dOgCNZnuGgwvFm0xsTNzpDvyyxghsSh894uVQ9y+OobX+jDHTDQg+u9Ubwoqpb MIME-Version: 1.0 X-Received: by 2002:a6b:700a:: with SMTP id l10-v6mr5725202ioc.60.1528611302687; Sat, 09 Jun 2018 23:15:02 -0700 (PDT) Date: Sat, 09 Jun 2018 23:15:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b24d0c056e438d2d@google.com> Subject: KASAN: slab-out-of-bounds Write 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: 410feb75de24 Merge tag 'arm64-upstream' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1308a0cf800000 kernel config: https://syzkaller.appspot.com/x/.config?x=7c0dfd1fff57e223 dashboard link: https://syzkaller.appspot.com/bug?extid=5c74af81c547738e1684 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+5c74af81c547738e1684@syzkaller.appspotmail.com RDX: 00000000fffffdef RSI: 00000000200005c0 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000020000000 R09: 000000000000001c R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000015 R13: 00000000004c0d3b R14: 00000000004d07a8 R15: 0000000000000002 ================================================================== 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+0x1023/0x13e0 net/tls/tls_sw.c:240 Write of size 1 at addr ffff8801bae68000 by task syz-executor1/24187 CPU: 1 PID: 24187 Comm: syz-executor1 Not tainted 4.17.0+ #91 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+0x1b9/0x294 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+0x1023/0x13e0 net/tls/tls_sw.c:240 tls_sw_push_pending_record+0x22/0x30 net/tls/tls_sw.c:276 tls_push_pending_closed_record+0x10c/0x150 net/tls/tls_main.c:211 tls_complete_pending_work include/net/tls.h:277 [inline] tls_sk_proto_close+0x8f2/0xad0 net/tls/tls_main.c:263 inet_release+0x104/0x1f0 net/ipv4/af_inet.c:427 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:459 sock_release+0x96/0x1b0 net/socket.c:598 sock_close+0x16/0x20 net/socket.c:1174 __fput+0x353/0x890 fs/file_table.c:209 ____fput+0x15/0x20 fs/file_table.c:243 task_work_run+0x1e4/0x290 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1aee/0x2730 kernel/exit.c:865 do_group_exit+0x16f/0x430 kernel/exit.c:968 get_signal+0x886/0x1960 kernel/signal.c:2478 do_signal+0x98/0x2040 arch/x86/kernel/signal.c:810 exit_to_usermode_loop+0x28a/0x310 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:265 [inline] do_syscall_64+0x6ac/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4559f9 Code: 1d ba 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb96babace8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000072bec8 RCX: 00000000004559f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000072bec8 RBP: 000000000072bec8 R08: 0000000000000033 R09: 000000000072bea0 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd163d2bff R14: 00007fb96babb9c0 R15: 0000000000000000 Allocated by task 24192: 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 __do_kmalloc mm/slab.c:3718 [inline] __kmalloc+0x14e/0x760 mm/slab.c:3727 kmalloc include/linux/slab.h:518 [inline] rw_copy_check_uvector+0x31e/0x3a0 fs/read_write.c:781 import_iovec+0xc3/0x420 lib/iov_iter.c:1459 vfs_readv+0xe2/0x1a0 fs/read_write.c:984 do_preadv+0x1ba/0x270 fs/read_write.c:1070 __do_sys_preadv fs/read_write.c:1120 [inline] __se_sys_preadv fs/read_write.c:1115 [inline] __x64_sys_preadv+0x9a/0xf0 fs/read_write.c:1115 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 24192: 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] kfree+0xd9/0x260 mm/slab.c:3813 import_iovec+0x32e/0x420 lib/iov_iter.c:1463 vfs_readv+0xe2/0x1a0 fs/read_write.c:984 do_preadv+0x1ba/0x270 fs/read_write.c:1070 __do_sys_preadv fs/read_write.c:1120 [inline] __se_sys_preadv fs/read_write.c:1115 [inline] __x64_sys_preadv+0x9a/0xf0 fs/read_write.c:1115 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8801bae69f80 which belongs to the cache kmalloc-16384 of size 16384 The buggy address is located 8064 bytes to the left of 16384-byte region [ffff8801bae69f80, ffff8801bae6df80) The buggy address belongs to the page: page:ffffea0006eb9a00 count:1 mapcount:0 mapping:ffff8801da802200 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea0005e2a408 ffff8801da801c48 ffff8801da802200 raw: 0000000000000000 ffff8801bae69f80 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801bae67f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801bae67f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ffff8801bae68000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801bae68080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801bae68100: 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.