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 35A42C4321E for ; Fri, 7 Sep 2018 08:38:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CFEE4206BB for ; Fri, 7 Sep 2018 08:38:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CFEE4206BB 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 S1728156AbeIGNR5 (ORCPT ); Fri, 7 Sep 2018 09:17:57 -0400 Received: from mail-it0-f70.google.com ([209.85.214.70]:39418 "EHLO mail-it0-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728071AbeIGNR4 (ORCPT ); Fri, 7 Sep 2018 09:17:56 -0400 Received: by mail-it0-f70.google.com with SMTP id w196-v6so18701241itb.4 for ; Fri, 07 Sep 2018 01:38:03 -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=7ABnmAd5zyZxB/9Q3Turs7e+vlK3CYX7hf5YIylZu8g=; b=ImTs3/0dEX8J1mxNWtie9Qo3Y0xSs+NbAd14X6brYFRXSgMZLBIEDY5X3nOmPA5Jqy F0S5qH+F9hZ2CpV3MYaJKLShLrDzAZ1V7f3bJd7VszPr7lJ81vEyYM00qHRvELVxhrUk k4nYBvXD/Y7Wd4VvOxN/pRoBin1OoGI780LM8FX8tHo2tQTMHXlangs2MGRcqvlms115 iAlr1dmwnT1sjhUFDXYIVQsuAwQvyHaiaVaOWJNB6LSCYSj7CFYI4er+kUY78Gk/vs6P nlh8JNQnZDjUwl5mP5hdjwUVy4vcslu0uz9D+UeGkRkawOO3excUrM/5WTvMSCICL6Ne FKOA== X-Gm-Message-State: APzg51BCCeUEhaoRRzHFAsGfRWSr1eVM8XmRLcpXelp2fsG0m0coGF/k 1JiYBwie2XCmY+Dv0qdvC84kU3ui+1CT6YceITqo0IlqCLvY X-Google-Smtp-Source: ANB0VdZ5/Li3bL7KbhwHXl0Zsw5NE2p1y8kbZi8GekKEuCUCHQAgMw1vPDv1o5BCmfr002m5fU2MkqgoPlYl+4eaj6d1AkZ9M9rl MIME-Version: 1.0 X-Received: by 2002:a24:783:: with SMTP id f125-v6mr5865668itf.50.1536309482789; Fri, 07 Sep 2018 01:38:02 -0700 (PDT) Date: Fri, 07 Sep 2018 01:38:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000fca96a057543ecea@google.com> Subject: KASAN: use-after-free Read in cma_bind_port 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: b36fdc6853a3 Merge tag 'gpio-v4.19-2' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1660c266400000 kernel config: https://syzkaller.appspot.com/x/.config?x=6c9564cd177daf0c dashboard link: https://syzkaller.appspot.com/bug?extid=da2591e115d57a9cbb8b 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+da2591e115d57a9cbb8b@syzkaller.appspotmail.com ================================================================== BUG: KASAN: use-after-free in cma_bind_port+0x35d/0x3f0 drivers/infiniband/core/cma.c:3059 Read of size 2 at addr ffff8801b89fb320 by task syz-executor3/7584 CPU: 1 PID: 7584 Comm: syz-executor3 Not tainted 4.19.0-rc2+ #224 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+0x242/0x30d mm/kasan/report.c:412 __asan_report_load2_noabort+0x14/0x20 mm/kasan/report.c:431 cma_bind_port+0x35d/0x3f0 drivers/infiniband/core/cma.c:3059 cma_alloc_port+0x115/0x180 drivers/infiniband/core/cma.c:3095 cma_alloc_any_port drivers/infiniband/core/cma.c:3160 [inline] cma_get_port drivers/infiniband/core/cma.c:3314 [inline] rdma_bind_addr+0x1765/0x23d0 drivers/infiniband/core/cma.c:3434 cma_bind_addr drivers/infiniband/core/cma.c:2963 [inline] rdma_resolve_addr+0x4fa/0x27a0 drivers/infiniband/core/cma.c:2974 ucma_resolve_ip+0x242/0x2a0 drivers/infiniband/core/ucma.c:711 ucma_write+0x336/0x420 drivers/infiniband/core/ucma.c:1680 __vfs_write+0x117/0x9d0 fs/read_write.c:485 vfs_write+0x1fc/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: 0033:0x457099 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:00007f47da18ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f47da18b6d4 RCX: 0000000000457099 RDX: 0000000000000048 RSI: 0000000020000240 RDI: 0000000000000005 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d8100 R14: 00000000004c1c28 R15: 0000000000000000 Allocated by task 7601: 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+0x152/0x730 mm/slab.c:3620 kmalloc include/linux/slab.h:513 [inline] kzalloc include/linux/slab.h:707 [inline] __rdma_create_id+0xdf/0x7a0 drivers/infiniband/core/cma.c:782 ucma_create_id+0x399/0x9d0 drivers/infiniband/core/ucma.c:502 ucma_write+0x336/0x420 drivers/infiniband/core/ucma.c:1680 __vfs_write+0x117/0x9d0 fs/read_write.c:485 vfs_write+0x1fc/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 Freed by task 7583: 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+0xd9/0x210 mm/slab.c:3813 rdma_destroy_id+0x848/0xce0 drivers/infiniband/core/cma.c:1737 ucma_close+0x100/0x300 drivers/infiniband/core/ucma.c:1759 __fput+0x38a/0xa40 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 ffff8801b89fb300 which belongs to the cache kmalloc-2048 of size 2048 The buggy address is located 32 bytes inside of 2048-byte region [ffff8801b89fb300, ffff8801b89fbb00) The buggy address belongs to the page: page:ffffea0006e27e80 count:1 mapcount:0 mapping:ffff8801dac00c40 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea0006ec8108 ffffea0006e90288 ffff8801dac00c40 raw: 0000000000000000 ffff8801b89fa200 0000000100000003 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801b89fb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801b89fb280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8801b89fb300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801b89fb380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801b89fb400: 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.