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_DIGITS, 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 01A6BC4321E for ; Mon, 10 Sep 2018 08:31:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 559B32086B for ; Mon, 10 Sep 2018 08:31:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 559B32086B 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 S1728027AbeIJNX5 (ORCPT ); Mon, 10 Sep 2018 09:23:57 -0400 Received: from mail-it0-f69.google.com ([209.85.214.69]:56121 "EHLO mail-it0-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727649AbeIJNX5 (ORCPT ); Mon, 10 Sep 2018 09:23:57 -0400 Received: by mail-it0-f69.google.com with SMTP id m207-v6so40056704itg.5 for ; Mon, 10 Sep 2018 01:31:04 -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=M+qkXYg5KszHm2B4cc030LZ85XiIOzlEm4CryboVBhw=; b=b4ytGauL7DOxBi5t+qqh8ZmewxHyErDQMUjxseFERIsiZbuK98qOKeRG3ygVvN7PMb 5+Q/gbi6Suwhjy/bJ5I81jKq3d8vbs/l/jcpesbolK4vQSqs4boB6fvzJXco3Kced9vy Br4pL+Wkz/p/E5jPGLsYTn8Abzgelp6dytPhodQ5Z4w5xAWd3A9Nj+0HSp46UogQrWI2 LOQ9nC2rK3MS1VYXQ8khc64+RYbHrYX1DVevlhJCBwbj7x3Xyi58tHXGxtBA9ckr0vSS aEEs9Qby8o9cs5+QqAUm7E1tmUXLODIBMX0js/+1T0oQ6FVa/XKSt12vLXnzf5bh65vL 8EDw== X-Gm-Message-State: APzg51Cu+a20RfY0YQLyKF7NHu6m/HNck5gz00aC5qTT3ghOyg8A87Wb PZHUeJEQZ4pLNAap9axvTPT7X/ml3BGFL3abqQlwv6TiBi6z X-Google-Smtp-Source: ANB0VdYBy4idN/3Rt4ny/hLdyy1f3ZTwiHChJXfQI29cb8R3Ci57g4bA2s5VQSUNbWnq3PrIq1sfUesq25aFdPMx8iDP6wJC31jk MIME-Version: 1.0 X-Received: by 2002:a24:1382:: with SMTP id 124-v6mr18309823itz.30.1536568264013; Mon, 10 Sep 2018 01:31:04 -0700 (PDT) Date: Mon, 10 Sep 2018 01:31:04 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000008cc5260575802d0d@google.com> Subject: KASAN: use-after-free Read in psock_map_pop From: syzbot To: ast@kernel.org, daniel@iogearbox.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: 28619527b8a7 Merge git://git.kernel.org/pub/scm/linux/kern.. git tree: bpf console output: https://syzkaller.appspot.com/x/log.txt?x=1442c149400000 kernel config: https://syzkaller.appspot.com/x/.config?x=8f59875069d721b6 dashboard link: https://syzkaller.appspot.com/bug?extid=5bbe234204453085d43e compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17fb118e400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=169f48be400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+5bbe234204453085d43e@syzkaller.appspotmail.com ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x37c2/0x4ec0 kernel/locking/lockdep.c:3291 Read of size 8 at addr ffff8801be270b88 by task syz-executor843/16792 CPU: 0 PID: 16792 Comm: syz-executor843 Not tainted 4.19.0-rc2+ #51 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 __lock_acquire+0x37c2/0x4ec0 kernel/locking/lockdep.c:3291 lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3901 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:168 spin_lock_bh include/linux/spinlock.h:334 [inline] psock_map_pop.isra.22+0x93/0x3b0 kernel/bpf/sockmap.c:298 bpf_tcp_close+0x6ca/0x10c0 kernel/bpf/sockmap.c:380 inet_release+0x104/0x1f0 net/ipv4/af_inet.c:428 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:457 __sock_release+0xd7/0x250 net/socket.c:579 sock_close+0x19/0x20 net/socket.c:1139 __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 RIP: 0033:0x4063c1 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 b4 17 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007ffdfa87cf10 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00000000004063c1 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000003 RBP: 00000000006ddc30 R08: 00000000006ddc30 R09: 0000000000406c00 R10: 00007ffdfa87cf30 R11: 0000000000000293 R12: 00000000006ddc3c R13: 00000000000003e8 R14: 0000000000000004 R15: 000000000000002d Allocated by task 16796: 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_node_trace+0x14c/0x740 mm/slab.c:3663 kmalloc_node include/linux/slab.h:551 [inline] kzalloc_node include/linux/slab.h:718 [inline] smap_init_psock kernel/bpf/sockmap.c:1614 [inline] __sock_map_ctx_update_elem.isra.23+0x7a9/0x12f0 kernel/bpf/sockmap.c:1918 sock_map_ctx_update_elem.isra.24+0x1a3/0xbe0 kernel/bpf/sockmap.c:1983 sock_map_update_elem+0x22a/0x5a0 kernel/bpf/sockmap.c:2109 map_update_elem+0x753/0xd50 kernel/bpf/syscall.c:799 __do_sys_bpf kernel/bpf/syscall.c:2363 [inline] __se_sys_bpf kernel/bpf/syscall.c:2334 [inline] __x64_sys_bpf+0x32d/0x510 kernel/bpf/syscall.c:2334 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 14: 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 smap_gc_work+0x910/0xc70 kernel/bpf/sockmap.c:1607 process_one_work+0xc90/0x1b90 kernel/workqueue.c:2153 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 The buggy address belongs to the object at ffff8801be270940 which belongs to the cache kmalloc-1024 of size 1024 The buggy address is located 584 bytes inside of 1024-byte region [ffff8801be270940, ffff8801be270d40) The buggy address belongs to the page: page:ffffea0006f89c00 count:1 mapcount:0 mapping:ffff8801da800ac0 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea0006fa1408 ffffea0006f8ea08 ffff8801da800ac0 raw: 0000000000000000 ffff8801be270040 0000000100000007 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801be270a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801be270b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff8801be270b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801be270c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801be270c80: 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. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches