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 71E28C6778F for ; Mon, 9 Jul 2018 05:51:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3315A208A3 for ; Mon, 9 Jul 2018 05:51:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3315A208A3 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 S1754427AbeGIFvF (ORCPT ); Mon, 9 Jul 2018 01:51:05 -0400 Received: from mail-it0-f70.google.com ([209.85.214.70]:58592 "EHLO mail-it0-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750952AbeGIFvD (ORCPT ); Mon, 9 Jul 2018 01:51:03 -0400 Received: by mail-it0-f70.google.com with SMTP id j80-v6so14838464itj.8 for ; Sun, 08 Jul 2018 22:51:03 -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=sV/Q0yKQsbKxlgX+yaSfjedk6RGTOR0KAoMf2Z6+GS4=; b=JEe1u6m9dGbGNPEhPD20i1uQTfEg1Kn29wnyLbUiLMPNb/nd/hAHJP9tmEDzxcAWhX GUeiU1upE+MLtClw74LXAVt0g6Ynw8D7HgU6bhn3WhLdYRiLj37JK/21thQhnXvBX3vh JHUHJAs04Rfh2GGY0n9N4Q8XNZ/7mPEteP+dSoXCqesXKqVGzeqJ3nF0HSmvsgi7wGcx JHKJPRO8+pJZFq+U2L3Ion11Op0NsjjQJ08exdP9IP02kFp2Fs8YYCg6vDf0tyKATJ2G Wv7AAkzeshLqq9ybda36mO7xVqKMNlwNloVOFpWqefTD6MNG7KkbDyrJIR4BSpEYuQX1 6yzw== X-Gm-Message-State: APt69E1hlw18ngW4CnaxzCKHNqjfwd/7TFUPQfvApntEBJB/Z4vEBwSa hbhfnKw/ggRU8MpeVBxlFZdlXKr/ZCyK9To0a3Ru+L1E0FF1 X-Google-Smtp-Source: AAOMgpfHNVcxvnAIq+riyudx+Yry43FW9KgXooC0zDPwpu+FeUlTj/RExJXYhy278byWHBfBvCBaPwJwT06jqV0EMliwCv0lSfH/ MIME-Version: 1.0 X-Received: by 2002:a6b:3042:: with SMTP id w63-v6mr8522258iow.5.1531115462996; Sun, 08 Jul 2018 22:51:02 -0700 (PDT) Date: Sun, 08 Jul 2018 22:51:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000483ec605708a998d@google.com> Subject: general protection fault in kfree (2) From: syzbot To: davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, rminnich@sandia.gov, syzkaller-bugs@googlegroups.com, v9fs-developer@lists.sourceforge.net 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: 526674536360 Add linux-next specific files for 20180706 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1673a452400000 kernel config: https://syzkaller.appspot.com/x/.config?x=c8d1cfc0cb798e48 dashboard link: https://syzkaller.appspot.com/bug?extid=1ff9d2e170913c4ef264 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+1ff9d2e170913c4ef264@syzkaller.appspotmail.com binder: 9948:9953 ioctl 40046207 0 returned -16 binder_alloc: 9948: binder_alloc_buf, no vma binder: 9948:9977 transaction failed 29189/-3, size 64-8 line 2967 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN CPU: 0 PID: 9980 Comm: syz-executor3 Not tainted 4.18.0-rc3-next-20180706+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:virt_to_head_page include/linux/mm.h:638 [inline] RIP: 0010:virt_to_cache mm/slab.c:399 [inline] RIP: 0010:kfree+0xa0/0x260 mm/slab.c:3809 Code: 82 cb 01 00 00 48 ba 00 00 00 80 ff 77 00 00 48 01 c2 48 89 df 48 b8 00 00 00 00 00 ea ff ff 48 c1 ea 0c 48 c1 e2 06 48 01 c2 <48> 8b 42 08 a8 01 48 8d 48 ff 48 0f 45 d1 4c 8b 6a 18 49 63 75 74 RSP: 0018:ffff88017e6b75d0 EFLAGS: 00010003 RAX: ffffea0000000000 RBX: 80f741c3d79d9d00 RCX: 1ffff1002fcd6ed8 RDX: 0203c8e70f5e7640 RSI: ffffffff876f3b49 RDI: 80f741c3d79d9d00 RBP: ffff88017e6b75f0 R08: ffff8801bad50640 R09: ffffed002fcd6e8a R10: ffffed003b5c5930 R11: 0000000000000003 R12: 0000000000000286 R13: ffffffff876f3b83 R14: ffff88017e6b7740 R15: ffff880183b696c0 FS: 00007f08a8f7d700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 binder: undelivered TRANSACTION_ERROR: 29189 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000702076 CR3: 00000001ca1ff000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: p9_client_version net/9p/client.c:1009 [inline] p9_client_create+0xf43/0x16c9 net/9p/client.c:1069 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135 legacy_get_tree+0x118/0x440 fs/fs_context.c:659 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1751 do_new_mount fs/namespace.c:2567 [inline] do_mount+0x6c1/0x1fb0 fs/namespace.c:2889 ksys_mount+0x12d/0x140 fs/namespace.c:3105 __do_sys_mount fs/namespace.c:3119 [inline] __se_sys_mount fs/namespace.c:3116 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3116 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455e29 Code: 1d ba 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f08a8f7cc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f08a8f7d6d4 RCX: 0000000000455e29 RDX: 0000000020000080 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 000000000072bea0 R08: 0000000020000380 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c05ca R14: 00000000004d0070 R15: 0000000000000000 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 358e803a851a10fe ]--- RIP: 0010:virt_to_head_page include/linux/mm.h:638 [inline] RIP: 0010:virt_to_cache mm/slab.c:399 [inline] RIP: 0010:kfree+0xa0/0x260 mm/slab.c:3809 Code: 82 cb 01 00 00 48 ba 00 00 00 80 ff 77 00 00 48 01 c2 48 89 df 48 b8 00 00 00 00 00 ea ff ff 48 c1 ea 0c 48 c1 e2 06 48 01 c2 <48> 8b 42 08 a8 01 48 8d 48 ff 48 0f 45 d1 4c 8b 6a 18 49 63 75 74 RSP: 0018:ffff88017e6b75d0 EFLAGS: 00010003 RAX: ffffea0000000000 RBX: 80f741c3d79d9d00 RCX: 1ffff1002fcd6ed8 RDX: 0203c8e70f5e7640 RSI: ffffffff876f3b49 RDI: 80f741c3d79d9d00 RBP: ffff88017e6b75f0 R08: ffff8801bad50640 R09: ffffed002fcd6e8a R10: ffffed003b5c5930 R11: 0000000000000003 R12: 0000000000000286 R13: ffffffff876f3b83 R14: ffff88017e6b7740 R15: ffff880183b696c0 FS: 00007f08a8f7d700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000702076 CR3: 00000001ca1ff000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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.