From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) by kanga.kvack.org (Postfix) with ESMTP id 30E1D8E0002 for ; Wed, 2 Jan 2019 04:42:24 -0500 (EST) Received: by mail-io1-f69.google.com with SMTP id f24so35586198ioh.21 for ; Wed, 02 Jan 2019 01:42:24 -0800 (PST) Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id m25sor43474815iti.26.2019.01.02.01.42.20 for (Google Transport Security); Wed, 02 Jan 2019 01:42:22 -0800 (PST) MIME-Version: 1.0 References: <000000000000ae384d057dc685c1@google.com> <1186a139-3a46-3311-5f72-bef02d403ee1@suse.cz> In-Reply-To: <1186a139-3a46-3311-5f72-bef02d403ee1@suse.cz> From: Dmitry Vyukov Date: Wed, 2 Jan 2019 10:42:09 +0100 Message-ID: Subject: Re: general protection fault in transparent_hugepage_enabled Content-Type: text/plain; charset="UTF-8" Sender: owner-linux-mm@kvack.org List-ID: To: Vlastimil Babka Cc: syzbot , Andrew Morton , "Aneesh Kumar K.V" , Hugh Dickins , Jerome Glisse , Konstantin Khlebnikov , "Kirill A. Shutemov" , LKML , Linux-MM , Michal Hocko , David Rientjes , Stephen Rothwell , syzkaller-bugs , Matthew Wilcox On Wed, Jan 2, 2019 at 8:42 AM Vlastimil Babka wrote: > > On 12/24/18 4:48 PM, syzbot wrote: > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit: 6a1d293238c1 Add linux-next specific files for 20181224 > > git tree: linux-next > > console output: https://syzkaller.appspot.com/x/log.txt?x=149a2add400000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=c190b602a5d2d731 > > dashboard link: https://syzkaller.appspot.com/bug?extid=a5fea9200aefd1cf4818 > > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1798bfb7400000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17f4dc57400000 > > > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > > Reported-by: syzbot+a5fea9200aefd1cf4818@syzkaller.appspotmail.com > > > > sshd (6016) used greatest stack depth: 15720 bytes left > > kasan: CONFIG_KASAN_INLINE enabled > > kasan: GPF could be caused by NULL-ptr deref or user memory access > > general protection fault: 0000 [#1] PREEMPT SMP KASAN > > CPU: 1 PID: 6032 Comm: syz-executor045 Not tainted 4.20.0-rc7-next-20181224 > > #187 > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > > Google 01/01/2011 > > RIP: 0010:transparent_hugepage_enabled+0x8c/0x5e0 mm/huge_memory.c:69 > > FTR, it was most certainly the same thing as here: > https://marc.info/?l=linux-mm&m=154563777207477&w=2 Thanks for the update. I see the fix is still not in linux-next, which has: +bool transparent_hugepage_enabled(struct vm_area_struct *vma) +{ + if (vma_is_anonymous(vma)) + return __transparent_hugepage_enabled(vma); + if (vma_is_shmem(vma) && shmem_huge_enabled(vma)) + return __transparent_hugepage_enabled(vma); + + return false; +} Let's wait until the patch is updated and then tell syzbot that "mm, thp, proc: report THP eligibility for each vma" fixes this. > > Code: 80 3c 02 00 0f 85 ae 04 00 00 4c 8b a3 a0 00 00 00 48 b8 00 00 00 00 > > 00 fc ff df 49 8d bc 24 b8 01 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f > > 85 91 04 00 00 49 8b bc 24 b8 01 00 00 e8 2d 70 e6 > > RSP: 0018:ffff8881c2237138 EFLAGS: 00010202 > > RAX: dffffc0000000000 RBX: ffff8881c2bdbc60 RCX: 0000000000000000 > > RDX: 0000000000000037 RSI: ffffffff81c8fa1a RDI: 00000000000001b8 > > RBP: ffff8881c2237160 R08: ffffed10383b25ed R09: ffffed10383b25ec > > R10: ffffed10383b25ec R11: ffff8881c1d92f63 R12: 0000000000000000 > > R13: ffff8881c2bdbd00 R14: dffffc0000000000 R15: 0000000000000f5e > > FS: 0000000001a48880(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 0000000020b58000 CR3: 00000001c2210000 CR4: 00000000001406e0 > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > Call Trace: > > show_smap+0x167/0x580 fs/proc/task_mmu.c:805 > > traverse+0x344/0x7b0 fs/seq_file.c:113 > > seq_read+0xc76/0x1150 fs/seq_file.c:188 > > do_loop_readv_writev fs/read_write.c:700 [inline] > > do_iter_read+0x4bc/0x670 fs/read_write.c:924 > > vfs_readv+0x175/0x1c0 fs/read_write.c:986 > > kernel_readv fs/splice.c:362 [inline] > > default_file_splice_read+0x539/0xb20 fs/splice.c:417 > > do_splice_to+0x12e/0x190 fs/splice.c:880 > > splice_direct_to_actor+0x31c/0x9d0 fs/splice.c:957 > > do_splice_direct+0x2d4/0x420 fs/splice.c:1066 > > do_sendfile+0x62a/0xe50 fs/read_write.c:1439 > > __do_sys_sendfile64 fs/read_write.c:1494 [inline] > > __se_sys_sendfile64 fs/read_write.c:1486 [inline] > > __x64_sys_sendfile64+0x15d/0x250 fs/read_write.c:1486 > > do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 > > entry_SYSCALL_64_after_hwframe+0x49/0xbe > > RIP: 0033:0x440089 > > Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 > > RSP: 002b:00007fff3d710a18 EFLAGS: 00000213 ORIG_RAX: 0000000000000028 > > RAX: ffffffffffffffda RBX: 00007fff3d710a20 RCX: 0000000000440089 > > RDX: 0000000020b58000 RSI: 0000000000000003 RDI: 0000000000000003 > > RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f > > R10: 000000000000ffff R11: 0000000000000213 R12: 0000000000401970 > > R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000 > > Modules linked in: > > ---[ end trace faf026efd8795e93 ]--- > > RIP: 0010:transparent_hugepage_enabled+0x8c/0x5e0 mm/huge_memory.c:69 > > Code: 80 3c 02 00 0f 85 ae 04 00 00 4c 8b a3 a0 00 00 00 48 b8 00 00 00 00 > > 00 fc ff df 49 8d bc 24 b8 01 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f > > 85 91 04 00 00 49 8b bc 24 b8 01 00 00 e8 2d 70 e6 > > RSP: 0018:ffff8881c2237138 EFLAGS: 00010202 > > RAX: dffffc0000000000 RBX: ffff8881c2bdbc60 RCX: 0000000000000000 > > RDX: 0000000000000037 RSI: ffffffff81c8fa1a RDI: 00000000000001b8 > > RBP: ffff8881c2237160 R08: ffffed10383b25ed R09: ffffed10383b25ec > > R10: ffffed10383b25ec R11: ffff8881c1d92f63 R12: 0000000000000000 > > R13: ffff8881c2bdbd00 R14: dffffc0000000000 R15: 0000000000000f5e > > FS: 0000000001a48880(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 0000000020b58000 CR3: 00000001c2210000 CR4: 00000000001406e0 > > 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. > > syzbot can test patches for this bug, for details see: > > https://goo.gl/tpsmEJ#testing-patches 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=-8.6 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=unavailable 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 42542C43444 for ; Wed, 2 Jan 2019 09:42:25 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D6FF321871 for ; Wed, 2 Jan 2019 09:42:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="LwDj3eIU" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D6FF321871 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 705688E0017; Wed, 2 Jan 2019 04:42:24 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 6B4B98E0002; Wed, 2 Jan 2019 04:42:24 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5A3ED8E0017; Wed, 2 Jan 2019 04:42:24 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) by kanga.kvack.org (Postfix) with ESMTP id 30E1D8E0002 for ; Wed, 2 Jan 2019 04:42:24 -0500 (EST) Received: by mail-io1-f69.google.com with SMTP id f24so35586198ioh.21 for ; Wed, 02 Jan 2019 01:42:24 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:dkim-signature:mime-version:references :in-reply-to:from:date:message-id:subject:to:cc; bh=lN8aYFkXMIh18S4pB8FBTHOVGOAHhewcRsB/ZesP0k8=; b=QG1zS8prhbj534CF9p4BDfAYrcjjvTIF6g1nLdJRFHRpKM0UqUG7U/oCAl2xHwQ7OT PB9xdYmNTa2jDMw/K6DfYVkM9mkpw7id47YdxcjfY8ptkY+C3BGNe8pFbia+kucOcbXE pW3W+CsNbTMEZZBqrJtVbbcOjSSIXvLbfXlpFvZJp8Uvr2yR0R6O/lDTHp4PMpmb2PXn vsdZ2zN5jl/GFj8VknUhl+CukALQu/dIMTSrsOWSuQk3ojaj0cAJP1CQkw0rASz6aZXg NYagQnCjBhY6x+KQv1jGx71BmjClutc/tHhSCr1gB9g4ZDQ5rTI/FS8xcr7lHgKLshpo +gwQ== X-Gm-Message-State: AJcUukdN0wcGp+GuHfYvqiYAEiH6+OZ0K6t+c0C9XzaBAZK+HSvpR9eR xqO6m2PuMaJ4v+m2PLch+O4/1ihLZNHDR3RpYNs9Wj2h1ikR4+flngwrdKEszgbE9ppR7JWjOHz /C6sajO5HYIwINZChUg9jagjQzZ9m37LfCeB+g6Ml4RPZEmoUTgkuxnKSHuDqj6E+389GBq8Nee 5/YbaTMACUt0FCn03iTCxY1lJd08IA+RTVSIfaUxrzzrCoFMJyJF3XvpusTZkq1yVCVktNRkBoz 6uDKHlyPu84xOqb7zfay8amYtWQTtqW3jgnP4nFuwOzJDKcx6Ljdn3tKLfSLsLfYbSiyu0jKGx6 t5mjiD/LunHZcOlcDv5xB7ZPrv+2cl6Xu7/5N6WfzMA8Y6xFZeCw7xT7i3lV2VPDjOdXdn0VPsC w X-Received: by 2002:a24:67c2:: with SMTP id u185mr28971724itc.171.1546422143830; Wed, 02 Jan 2019 01:42:23 -0800 (PST) X-Received: by 2002:a24:67c2:: with SMTP id u185mr28971694itc.171.1546422142206; Wed, 02 Jan 2019 01:42:22 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1546422142; cv=none; d=google.com; s=arc-20160816; b=UWft1gwDxGKs+lUfQerMdwKDwl3HHvrWe8g+BZryk+eb44Oy0DOg9/7E8A2QlCaSJB eu60JyJxHDn/+6UaCLrwFSdvNQpJ1fjq6I8g+Kve88vNcyjhbW1x70iedBVpvhZkYEGl Pi5A1R3LC486uc4daTj6tBwkE8y/x4OiLoNilbMkN95PV6A6sWH+oinTwlZl7RwTxv2l jRrl9b0rIm3sEvk6rtwEtHNETy3w3rOnCXxjdZ5oQYgRrGcO0woWaznRLcISJw1tgRHk ww13zDWl1rCVRuu5xDrthcwvn6enPYsnp8nFTtQpzulQwYP/IVJO0qNTjcrz9HC1vXy3 AlmQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:dkim-signature; bh=lN8aYFkXMIh18S4pB8FBTHOVGOAHhewcRsB/ZesP0k8=; b=sybbO0mmd72VSTqBfIELb+SiNYHZaCu/6+jciJFfqUiTeaf70ePEKzteE+36U0Rcw6 5JNrx0eXV7D61KmkPPqNM+4Ct0+ymR4QB1BCEVSTb2n7L+pLgJ8qqGOAhg3J7zR4+QZ8 UMJnVttpPrcVO3RY/x1ZGaXA2x4FKjHUBJGsCnUQJSUZmgPzJBKgcFSpgC/zQMD0Q0uN BWyXGCe2rIg1n5pNZvfSheaG3HizNHJ0NwlD2R8Tc3cTtwKm2LRo0KNo7kL25AXvoOe7 UO/SmJHuTcfkU4OzDOW8oUteZzlYDupgO8682Xi3XLnkYBmnQennCMF1/Obkjp4CKdZQ JY6A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b=LwDj3eIU; spf=pass (google.com: domain of dvyukov@google.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=dvyukov@google.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id m25sor43474815iti.26.2019.01.02.01.42.20 for (Google Transport Security); Wed, 02 Jan 2019 01:42:22 -0800 (PST) Received-SPF: pass (google.com: domain of dvyukov@google.com designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b=LwDj3eIU; spf=pass (google.com: domain of dvyukov@google.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=dvyukov@google.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=lN8aYFkXMIh18S4pB8FBTHOVGOAHhewcRsB/ZesP0k8=; b=LwDj3eIUDGIoJS+mHmlbfX2Zo91VRMp+LruorF6HsmbIoZkHTnZY7g02/4umOkTYyD 74vh9+lb6HNl9qGDW8oN/8A4R33m9iO7J2LN7H0GoqHmxTnYGuNjclu3OMKQb+nxbFmt lwvEWz47jcj/zJrXHHUCZg5/7QihJ/GPLB2EoY1ZJfkrmMoaLaIJrVRaR0qpjM7XVFWX Mo+xU72+rFLCu/i9ccHfh5ar2VjD/GcT8FH2plOpGS8H8UCSd08m5FbFAjablcoJvePn Q6YJHP+N/xuCntnzr+WjEcD67TaMdSrM+kw9xgl+ZvZa2wZB+YYLUFWVegy4HBSXaxLp AvWg== X-Google-Smtp-Source: ALg8bN7gwybTqjDD89hwFMgbJZozgjyRs4uG2VeG2i7qs5FaTXiGETcgKHpF5DWLYjo9GWbEqRKgWjncBf8iec1fkcQ= X-Received: by 2002:a24:f14d:: with SMTP id q13mr25762990iti.166.1546422140133; Wed, 02 Jan 2019 01:42:20 -0800 (PST) MIME-Version: 1.0 References: <000000000000ae384d057dc685c1@google.com> <1186a139-3a46-3311-5f72-bef02d403ee1@suse.cz> In-Reply-To: <1186a139-3a46-3311-5f72-bef02d403ee1@suse.cz> From: Dmitry Vyukov Date: Wed, 2 Jan 2019 10:42:09 +0100 Message-ID: Subject: Re: general protection fault in transparent_hugepage_enabled To: Vlastimil Babka Cc: syzbot , Andrew Morton , "Aneesh Kumar K.V" , Hugh Dickins , Jerome Glisse , Konstantin Khlebnikov , "Kirill A. Shutemov" , LKML , Linux-MM , Michal Hocko , David Rientjes , Stephen Rothwell , syzkaller-bugs , Matthew Wilcox Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Message-ID: <20190102094209.WZS4WytlIENZvUHUiqoHTw_eWaorqtFzTLMh_RJz1vg@z> On Wed, Jan 2, 2019 at 8:42 AM Vlastimil Babka wrote: > > On 12/24/18 4:48 PM, syzbot wrote: > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit: 6a1d293238c1 Add linux-next specific files for 20181224 > > git tree: linux-next > > console output: https://syzkaller.appspot.com/x/log.txt?x=149a2add400000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=c190b602a5d2d731 > > dashboard link: https://syzkaller.appspot.com/bug?extid=a5fea9200aefd1cf4818 > > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1798bfb7400000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17f4dc57400000 > > > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > > Reported-by: syzbot+a5fea9200aefd1cf4818@syzkaller.appspotmail.com > > > > sshd (6016) used greatest stack depth: 15720 bytes left > > kasan: CONFIG_KASAN_INLINE enabled > > kasan: GPF could be caused by NULL-ptr deref or user memory access > > general protection fault: 0000 [#1] PREEMPT SMP KASAN > > CPU: 1 PID: 6032 Comm: syz-executor045 Not tainted 4.20.0-rc7-next-20181224 > > #187 > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > > Google 01/01/2011 > > RIP: 0010:transparent_hugepage_enabled+0x8c/0x5e0 mm/huge_memory.c:69 > > FTR, it was most certainly the same thing as here: > https://marc.info/?l=linux-mm&m=154563777207477&w=2 Thanks for the update. I see the fix is still not in linux-next, which has: +bool transparent_hugepage_enabled(struct vm_area_struct *vma) +{ + if (vma_is_anonymous(vma)) + return __transparent_hugepage_enabled(vma); + if (vma_is_shmem(vma) && shmem_huge_enabled(vma)) + return __transparent_hugepage_enabled(vma); + + return false; +} Let's wait until the patch is updated and then tell syzbot that "mm, thp, proc: report THP eligibility for each vma" fixes this. > > Code: 80 3c 02 00 0f 85 ae 04 00 00 4c 8b a3 a0 00 00 00 48 b8 00 00 00 00 > > 00 fc ff df 49 8d bc 24 b8 01 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f > > 85 91 04 00 00 49 8b bc 24 b8 01 00 00 e8 2d 70 e6 > > RSP: 0018:ffff8881c2237138 EFLAGS: 00010202 > > RAX: dffffc0000000000 RBX: ffff8881c2bdbc60 RCX: 0000000000000000 > > RDX: 0000000000000037 RSI: ffffffff81c8fa1a RDI: 00000000000001b8 > > RBP: ffff8881c2237160 R08: ffffed10383b25ed R09: ffffed10383b25ec > > R10: ffffed10383b25ec R11: ffff8881c1d92f63 R12: 0000000000000000 > > R13: ffff8881c2bdbd00 R14: dffffc0000000000 R15: 0000000000000f5e > > FS: 0000000001a48880(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 0000000020b58000 CR3: 00000001c2210000 CR4: 00000000001406e0 > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > Call Trace: > > show_smap+0x167/0x580 fs/proc/task_mmu.c:805 > > traverse+0x344/0x7b0 fs/seq_file.c:113 > > seq_read+0xc76/0x1150 fs/seq_file.c:188 > > do_loop_readv_writev fs/read_write.c:700 [inline] > > do_iter_read+0x4bc/0x670 fs/read_write.c:924 > > vfs_readv+0x175/0x1c0 fs/read_write.c:986 > > kernel_readv fs/splice.c:362 [inline] > > default_file_splice_read+0x539/0xb20 fs/splice.c:417 > > do_splice_to+0x12e/0x190 fs/splice.c:880 > > splice_direct_to_actor+0x31c/0x9d0 fs/splice.c:957 > > do_splice_direct+0x2d4/0x420 fs/splice.c:1066 > > do_sendfile+0x62a/0xe50 fs/read_write.c:1439 > > __do_sys_sendfile64 fs/read_write.c:1494 [inline] > > __se_sys_sendfile64 fs/read_write.c:1486 [inline] > > __x64_sys_sendfile64+0x15d/0x250 fs/read_write.c:1486 > > do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 > > entry_SYSCALL_64_after_hwframe+0x49/0xbe > > RIP: 0033:0x440089 > > Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 > > RSP: 002b:00007fff3d710a18 EFLAGS: 00000213 ORIG_RAX: 0000000000000028 > > RAX: ffffffffffffffda RBX: 00007fff3d710a20 RCX: 0000000000440089 > > RDX: 0000000020b58000 RSI: 0000000000000003 RDI: 0000000000000003 > > RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f > > R10: 000000000000ffff R11: 0000000000000213 R12: 0000000000401970 > > R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000 > > Modules linked in: > > ---[ end trace faf026efd8795e93 ]--- > > RIP: 0010:transparent_hugepage_enabled+0x8c/0x5e0 mm/huge_memory.c:69 > > Code: 80 3c 02 00 0f 85 ae 04 00 00 4c 8b a3 a0 00 00 00 48 b8 00 00 00 00 > > 00 fc ff df 49 8d bc 24 b8 01 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f > > 85 91 04 00 00 49 8b bc 24 b8 01 00 00 e8 2d 70 e6 > > RSP: 0018:ffff8881c2237138 EFLAGS: 00010202 > > RAX: dffffc0000000000 RBX: ffff8881c2bdbc60 RCX: 0000000000000000 > > RDX: 0000000000000037 RSI: ffffffff81c8fa1a RDI: 00000000000001b8 > > RBP: ffff8881c2237160 R08: ffffed10383b25ed R09: ffffed10383b25ec > > R10: ffffed10383b25ec R11: ffff8881c1d92f63 R12: 0000000000000000 > > R13: ffff8881c2bdbd00 R14: dffffc0000000000 R15: 0000000000000f5e > > FS: 0000000001a48880(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 0000000020b58000 CR3: 00000001c2210000 CR4: 00000000001406e0 > > 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. > > syzbot can test patches for this bug, for details see: > > https://goo.gl/tpsmEJ#testing-patches