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=-0.7 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 11ABCC4321D for ; Mon, 20 Aug 2018 04:13:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AF2042152D for ; Mon, 20 Aug 2018 04:13:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AF2042152D 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 S1726042AbeHTH1C (ORCPT ); Mon, 20 Aug 2018 03:27:02 -0400 Received: from mail-io0-f200.google.com ([209.85.223.200]:39195 "EHLO mail-io0-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725944AbeHTH1B (ORCPT ); Mon, 20 Aug 2018 03:27:01 -0400 Received: by mail-io0-f200.google.com with SMTP id x5-v6so12351274ioa.6 for ; Sun, 19 Aug 2018 21:13:03 -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=YldPa4aJDtqvfWzrPKUflFWG4s+p1GA9iM/K75NmvMk=; b=EOE4WjvtS2HJNureC/ZbNJjQ6aiWtneEuwZGX7sNIQNyXeHGPJ7UlXRLVQVrqg637c knbyW6NH50QqlLjNlLHvafhmO0WzTttqxXKWYZaI8KxUbIWlSitMZMSKhtbMM0LwY2Es /3uNtbVfZQ4LSHxoKlFa/jHNFSbUKdnqmRiQiHaNSekumO8guTuR+4r2IGubFQE29pEx ETuzDf2CNxjdAmmc7tg1pYVt7J0wiKlcVwWnz6yZyZ0pzZEIM/4CF89qpCqFRtuHOqF3 vDRbNy/39+RSgPJNvpRYnrq8ekxicqOeCB0Ec3+o5+uRAMVISCcOOx/nlvoxVNCleuBV WhNQ== X-Gm-Message-State: AOUpUlEp00C+hmM/ePfPzrol8I9CL6m2Nl2WrQEqYi70sIbmaUmkRpzT RUZ9/eDUhM4tMAeR9EfRQohTgHw2iZD3nPQ5Ba+/fMei58Cy X-Google-Smtp-Source: AA+uWPwl0io/ibVCkq0lZOztnu0BvCNzElaCs6r8r4mdKKgdhH7CCRiJt5KpxWEgCE7xe0qNYfSTgTL7CAdZd9vFvKptkM0vSsU4 MIME-Version: 1.0 X-Received: by 2002:a24:5f51:: with SMTP id r78-v6mr18740094itb.6.1534738382574; Sun, 19 Aug 2018 21:13:02 -0700 (PDT) Date: Sun, 19 Aug 2018 21:13:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001de4b70573d62017@google.com> Subject: KASAN: slab-out-of-bounds Read in rdma_listen From: syzbot To: danielj@mellanox.com, dledford@redhat.com, jgg@ziepe.ca, leon@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, parav@mellanox.com, swise@opengridcomputing.com, 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: 5c60a7389d79 Merge tag 'for-linus-4.19-ofs1' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10bf9aee400000 kernel config: https://syzkaller.appspot.com/x/.config?x=4fd89f99c889a184 dashboard link: https://syzkaller.appspot.com/bug?extid=c92378b32760a4eef756 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+c92378b32760a4eef756@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in __list_add_valid+0x8f/0xb0 lib/list_debug.c:26 Read of size 8 at addr ffff880188b13098 by task syz-executor6/27383 CPU: 1 PID: 27383 Comm: syz-executor6 Not tainted 4.18.0+ #193 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_load8_noabort+0x14/0x20 mm/kasan/report.c:433 __list_add_valid+0x8f/0xb0 lib/list_debug.c:26 __list_add include/linux/list.h:60 [inline] list_add_tail include/linux/list.h:93 [inline] cma_listen_on_all drivers/infiniband/core/cma.c:2328 [inline] rdma_listen+0x6dc/0x990 drivers/infiniband/core/cma.c:3354 ucma_listen+0x1a4/0x260 drivers/infiniband/core/ucma.c:1096 ucma_write+0x336/0x420 drivers/infiniband/core/ucma.c:1680 __vfs_write+0x117/0x9d0 fs/read_write.c:485 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f211d28dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f211d28e6d4 RCX: 0000000000457089 RDX: 0000000000000010 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d7448 R14: 00000000004ca592 R15: 0000000000000000 Allocated by task 2291: 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 getname+0x19/0x20 fs/namei.c:211 do_sys_open+0x3a2/0x760 fs/open.c:1055 __do_sys_open fs/open.c:1079 [inline] __se_sys_open fs/open.c:1074 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1074 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 2291: 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 do_sys_open+0x569/0x760 fs/open.c:1070 __do_sys_open fs/open.c:1079 [inline] __se_sys_open fs/open.c:1074 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1074 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 ffff880188b12000 which belongs to the cache names_cache of size 4096 The buggy address is located 152 bytes to the right of 4096-byte region [ffff880188b12000, ffff880188b13000) The buggy address belongs to the page: page:ffffea000622c480 count:1 mapcount:0 mapping:ffff8801dad85dc0 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea00074e8708 ffffea00073cdb08 ffff8801dad85dc0 raw: 0000000000000000 ffff880188b12000 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff880188b12f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff880188b13000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff880188b13080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff880188b13100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff880188b13180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- This bug is generated by a bot. 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