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 D00A7C43382 for ; Tue, 25 Sep 2018 23:54:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 707B620895 for ; Tue, 25 Sep 2018 23:54:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 707B620895 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 S1726766AbeIZGEF (ORCPT ); Wed, 26 Sep 2018 02:04:05 -0400 Received: from mail-it1-f198.google.com ([209.85.166.198]:58440 "EHLO mail-it1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726010AbeIZGEF (ORCPT ); Wed, 26 Sep 2018 02:04:05 -0400 Received: by mail-it1-f198.google.com with SMTP id d194-v6so713071itb.8 for ; Tue, 25 Sep 2018 16:54:03 -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=ReUU9GMMSiK2fME3/XVbL95NLZOdYumWqCnlQXlyNto=; b=m7/9XfzQRO9/l9hF0JXnMk7Pjh6HsVTQNsDzIW3RdIGsuoJWDfxtNbOprf0KjytXnP EJH02NQ9DGc8GBGiYm8ITrW9ujzMiYIYQWlvLCPe8KuNxlVoJAkwxIb1axfEEGDCn1+5 NTQNKKd42ZaxJwRV5vNse+fZUGA2G+oiUDjaL7bk25emnJ+quKRiAv6C+rZYRO8U2cw9 vbZF8fvRoPei6ZUoSCHM1BhFML/1khfUenP64x9tS4laG0Fb8tavGbNVyfe3gMz6vRSv 3kfqP7kmFSm6n5RaCYFL1UpGZx8IgA4eoAhqif1ZKgC+aYjlcGfA44TAkflQi1f63g4a Qehw== X-Gm-Message-State: ABuFfojLFdD0C34D9xwqX+vy8kKbEYy8bsipngkZdD1UPv0a22CJ7X1I pWRkxQ3BBLtWqYMS0bs0PMy1OmSe5CsLfNakOq+vfcY4w7Fj X-Google-Smtp-Source: ACcGV6086RNULXp29YLaeTioucknkam1kSiofvrjgODNYSWTAdnUe/98/Pe125ZZRaN21kia2UhnWIKRayyl7G1qaX5bkgKcwAqW MIME-Version: 1.0 X-Received: by 2002:a6b:4a16:: with SMTP id w22-v6mr2642773iob.132.1537919643439; Tue, 25 Sep 2018 16:54:03 -0700 (PDT) Date: Tue, 25 Sep 2018 16:54:03 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000000a5b840576bad225@google.com> Subject: KASAN: slab-out-of-bounds 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: bd4d08daeb95 Merge branch 'net-dsa-b53-SGMII-modes-fixes' git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=110b6a1a400000 kernel config: https://syzkaller.appspot.com/x/.config?x=e79b9299baeb2298 dashboard link: https://syzkaller.appspot.com/bug?extid=12638b747fd208f6cff0 compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=167d9b9e400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15c4003a400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+12638b747fd208f6cff0@syzkaller.appspotmail.com random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. ================================================================== BUG: KASAN: slab-out-of-bounds in __swab64p include/uapi/linux/swab.h:192 [inline] BUG: KASAN: slab-out-of-bounds in __be64_to_cpup include/uapi/linux/byteorder/little_endian.h:74 [inline] BUG: KASAN: slab-out-of-bounds in is_tx_ready include/net/tls.h:354 [inline] BUG: KASAN: slab-out-of-bounds in tls_write_space+0x29d/0x2d0 net/tls/tls_main.c:236 Read of size 8 at addr ffff8801bc3c9ff0 by task ksoftirqd/1/18 CPU: 1 PID: 18 Comm: ksoftirqd/1 Not tainted 4.19.0-rc4+ #227 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 __swab64p include/uapi/linux/swab.h:192 [inline] __be64_to_cpup include/uapi/linux/byteorder/little_endian.h:74 [inline] is_tx_ready include/net/tls.h:354 [inline] tls_write_space+0x29d/0x2d0 net/tls/tls_main.c:236 tcp_new_space net/ipv4/tcp_input.c:5154 [inline] tcp_check_space+0x53f/0x920 net/ipv4/tcp_input.c:5165 tcp_data_snd_check net/ipv4/tcp_input.c:5175 [inline] tcp_rcv_established+0xde8/0x2120 net/ipv4/tcp_input.c:5656 tcp_v6_do_rcv+0x4b3/0x13c0 net/ipv6/tcp_ipv6.c:1326 tcp_v6_rcv+0x2f7a/0x38a0 net/ipv6/tcp_ipv6.c:1555 ip6_input_finish+0x3fc/0x1aa0 net/ipv6/ip6_input.c:384 NF_HOOK include/linux/netfilter.h:287 [inline] ip6_input+0xe9/0x600 net/ipv6/ip6_input.c:427 dst_input include/net/dst.h:450 [inline] ip6_rcv_finish+0x17a/0x330 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:287 [inline] ipv6_rcv+0x113/0x640 net/ipv6/ip6_input.c:272 __netif_receive_skb_one_core+0x14d/0x200 net/core/dev.c:4894 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:5004 process_backlog+0x217/0x760 net/core/dev.c:5808 napi_poll net/core/dev.c:6228 [inline] net_rx_action+0x7c5/0x1950 net/core/dev.c:6294 __do_softirq+0x30b/0xad8 kernel/softirq.c:292 run_ksoftirqd+0x94/0x100 kernel/softirq.c:653 smpboot_thread_fn+0x68b/0xa00 kernel/smpboot.c:164 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Allocated by task 3559: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553 kmem_cache_alloc_trace+0x152/0x750 mm/slab.c:3620 kmalloc include/linux/slab.h:513 [inline] kzalloc include/linux/slab.h:707 [inline] kernfs_fop_open+0x358/0xf90 fs/kernfs/file.c:648 do_dentry_open+0x499/0x1250 fs/open.c:771 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x12bf/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 3559: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3813 kernfs_fop_release+0x12b/0x1a0 fs/kernfs/file.c:783 __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 The buggy address belongs to the object at ffff8801bc3c9c80 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 368 bytes to the right of 512-byte region [ffff8801bc3c9c80, ffff8801bc3c9e80) The buggy address belongs to the page: page:ffffea0006f0f240 count:1 mapcount:0 mapping:ffff8801da800940 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea0006ee1408 ffffea0007619c08 ffff8801da800940 raw: 0000000000000000 ffff8801bc3c9000 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801bc3c9e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801bc3c9f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8801bc3c9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801bc3ca000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801bc3ca080: fc fc fc fc fc fc fc fc 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. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches