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=2.1 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 92851C3279B for ; Fri, 6 Jul 2018 07:36:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3007624082 for ; Fri, 6 Jul 2018 07:36:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3007624082 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 S1753586AbeGFHgE (ORCPT ); Fri, 6 Jul 2018 03:36:04 -0400 Received: from mail-it0-f71.google.com ([209.85.214.71]:55932 "EHLO mail-it0-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753225AbeGFHgD (ORCPT ); Fri, 6 Jul 2018 03:36:03 -0400 Received: by mail-it0-f71.google.com with SMTP id k13-v6so7393776ite.5 for ; Fri, 06 Jul 2018 00:36:02 -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=aN5hr36nULMr+xj4z5PhonN9QmERjBvnPu1Bep2f+4M=; b=mc6NL9bPyGC+sUfkHVsdw8m3U+ZfflzWtwvvNA9k69NmXVipB9p8PZhU4ySX8WNZCT y8MMh3eERYcuohWER8o7E+IcuQ21hL1K0t2Qc86ROhIN3eqkAKzswCMwlowa7cb4Y9dR W56OxcO1SnmZ9hrEDAhx8AHZDqNSCuvVL/vZKiSjoETiJQ1fKUfgTCEZvO8vhcIp92yg Egmw6BzvXwU5zQdN2Zmm7Q6SzjhBYvf3qTNUC/hwr4XwCfLlvllwndNqdEKBVKcccWZ/ suw/OaWaO6CWcz1Q6Cg5l9GeUD+7RVCdB3sny1PADRef0BiJ05mXN1yGQylE6RGd4qZ1 0hsA== X-Gm-Message-State: APt69E2FA/23WA13SJKhNMUMo84rMqC3LAZrcllL/KPIOBgZWyifnlqO g4DegxmvOZIQRXUxkwuNolsXrTHrFR8jbamhScezTlybqJrF X-Google-Smtp-Source: AAOMgpf/dRNdiiI19Ku2OsNxAEXRMpmz/2jNcpJoLDPC/BT9PXSHhHQrICSofihtqu4oDN0Je6m1RM3cJsxHtB/B4uwSHhgqt1KK MIME-Version: 1.0 X-Received: by 2002:a24:ca:: with SMTP id 193-v6mr3827354ita.45.1530862562544; Fri, 06 Jul 2018 00:36:02 -0700 (PDT) Date: Fri, 06 Jul 2018 00:36:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000003dab1605704fb71d@google.com> Subject: KASAN: use-after-free Read in tls_write_space 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: 1a84d7fdb5fc Merge branch 'mlxsw-Add-resource-scale-tests' git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=17dec75c400000 kernel config: https://syzkaller.appspot.com/x/.config?x=a63be0c83e84d370 dashboard link: https://syzkaller.appspot.com/bug?extid=2134b6b74dec9f8c760f 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+2134b6b74dec9f8c760f@syzkaller.appspotmail.com ================================================================== BUG: KASAN: use-after-free in tls_write_space+0x2c2/0x360 net/tls/tls_main.c:225 Read of size 1 at addr ffff8801d6eb35e0 by task syz-executor0/9404 CPU: 1 PID: 9404 Comm: syz-executor0 Not tainted 4.18.0-rc2+ #99 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_load1_noabort+0x14/0x20 mm/kasan/report.c:430 tls_write_space+0x2c2/0x360 net/tls/tls_main.c:225 tcp_new_space net/ipv4/tcp_input.c:5071 [inline] tcp_check_space+0x551/0x930 net/ipv4/tcp_input.c:5082 tcp_data_snd_check net/ipv4/tcp_input.c:5092 [inline] tcp_rcv_established+0x8db/0x2180 net/ipv4/tcp_input.c:5571 tcp_v6_do_rcv+0x421/0x13a0 net/ipv6/tcp_ipv6.c:1325 sk_backlog_rcv include/net/sock.h:914 [inline] __release_sock+0x12f/0x3a0 net/core/sock.c:2342 release_sock+0xad/0x2c0 net/core/sock.c:2851 tls_sk_proto_close+0x6e6/0xae0 net/tls/tls_main.c:302 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:603 sock_close+0x19/0x20 net/socket.c:1186 __fput+0x35b/0x8b0 fs/file_table.c:209 ____fput+0x15/0x20 fs/file_table.c:243 task_work_run+0x1ec/0x2a0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1b08/0x2750 kernel/exit.c:865 do_group_exit+0x177/0x440 kernel/exit.c:968 get_signal+0x88e/0x1970 kernel/signal.c:2468 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e0/0x370 arch/x86/entry/common.c:162 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: 0033:0x455a99 Code: Bad RIP value. RSP: 002b:00007f4377320c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: fffffffffffffe00 RBX: 00007f43773216d4 RCX: 0000000000455a99 RDX: 0000000020000040 RSI: 0000000020000200 RDI: 0000000000000017 RBP: 000000000072c098 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004bb3d4 R14: 00000000004c7e60 R15: 0000000000000003 Allocated by task 9402: 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 kmem_cache_alloc_trace+0x152/0x780 mm/slab.c:3620 kmalloc include/linux/slab.h:513 [inline] kzalloc include/linux/slab.h:707 [inline] create_ctx net/tls/tls_main.c:535 [inline] tls_init+0x1e7/0xb20 net/tls/tls_main.c:659 tcp_set_ulp+0x1bc/0x520 net/ipv4/tcp_ulp.c:153 do_tcp_setsockopt.isra.41+0x44a/0x2680 net/ipv4/tcp.c:2741 tcp_setsockopt+0xc1/0xe0 net/ipv4/tcp.c:3052 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3040 __sys_setsockopt+0x1c5/0x3b0 net/socket.c:1947 __do_sys_setsockopt net/socket.c:1958 [inline] __se_sys_setsockopt net/socket.c:1955 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1955 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 9404: 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 tls_sk_proto_close+0x712/0xae0 net/tls/tls_main.c:297 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:603 sock_close+0x19/0x20 net/socket.c:1186 __fput+0x35b/0x8b0 fs/file_table.c:209 ____fput+0x15/0x20 fs/file_table.c:243 task_work_run+0x1ec/0x2a0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1b08/0x2750 kernel/exit.c:865 do_group_exit+0x177/0x440 kernel/exit.c:968 get_signal+0x88e/0x1970 kernel/signal.c:2468 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e0/0x370 arch/x86/entry/common.c:162 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 The buggy address belongs to the object at ffff8801d6eb3500 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 224 bytes inside of 512-byte region [ffff8801d6eb3500, ffff8801d6eb3700) The buggy address belongs to the page: page:ffffea00075bacc0 count:1 mapcount:0 mapping:ffff8801da800940 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea00075d1388 ffffea000750dcc8 ffff8801da800940 raw: 0000000000000000 ffff8801d6eb3000 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d6eb3480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801d6eb3500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff8801d6eb3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801d6eb3600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801d6eb3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- 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.