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=-2.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 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 28CA1CA9EAE for ; Tue, 29 Oct 2019 08:51:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DCBF020663 for ; Tue, 29 Oct 2019 08:51:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b="eh3Y9Xro" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727531AbfJ2IvR (ORCPT ); Tue, 29 Oct 2019 04:51:17 -0400 Received: from new3-smtp.messagingengine.com ([66.111.4.229]:33367 "EHLO new3-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726566AbfJ2IvR (ORCPT ); Tue, 29 Oct 2019 04:51:17 -0400 X-Greylist: delayed 356 seconds by postgrey-1.27 at vger.kernel.org; Tue, 29 Oct 2019 04:51:16 EDT Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailnew.nyi.internal (Postfix) with ESMTP id 6A1985E7F; Tue, 29 Oct 2019 04:45:20 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute3.internal (MEProxy); Tue, 29 Oct 2019 04:45:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:in-reply-to:message-id:mime-version:references :subject:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm1; bh=wZYWFgqPL1c2WRcnaF/3gKe5yAeygMaGZr20SfJtc Ro=; b=eh3Y9XroeRVhyb8GKs22A2wm2MHnwDboaZuCNYo9WwerBLWCh6awkkIJV 5i8zj+tuks2JA/9lgRaOcTvdxEHKC3aoamv26oepcpVaNNS5UYjvsts3aWggXzPP RF9SRA024hnnMDzXzHsc3UK/OURGvhdb8jSqxeKFKGW0/dj1kagb2/qfpX8PPzdY n9b+oyv5pxy54/iedHny17kFtbSgZw64Mc74tI5TgAeT7MZWwRPgNnhu9FxvOm79 F6KaCCtM8l6F93VoOoCkbE3zM4N0L7k4nXT6j1CVsPBlkBIlLOfbgmgkg+KAPpwh PnGBtWaMWoPC0/+T2BKAknHfFdzSQ== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedufedruddttddguddvhecutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmd enogfuuhhsphgvtghtffhomhgrihhnucdlgeelmdenucfjughrpeffhffvuffkfhggtggu gfgjfgesthekredttderjeenucfhrhhomhepkfguohcuufgthhhimhhmvghluceoihguoh hstghhsehiughoshgthhdrohhrgheqnecuffhomhgrihhnpehgohhoghhlvgdrtghomhdp ghhoohdrghhlpdgrphhpshhpohhtrdgtohhmnecukfhppeduleefrdegjedrudeihedrvd ehudenucfrrghrrghmpehmrghilhhfrhhomhepihguohhstghhsehiughoshgthhdrohhr ghenucevlhhushhtvghrufhiiigvpedt X-ME-Proxy: Received: from localhost (unknown [193.47.165.251]) by mail.messagingengine.com (Postfix) with ESMTPA id 26A5A8005A; Tue, 29 Oct 2019 04:45:19 -0400 (EDT) Date: Tue, 29 Oct 2019 10:45:17 +0200 From: Ido Schimmel To: Dmitry Vyukov Cc: syzbot , Jiri Pirko , Alexei Starovoitov , bpf , Daniel Borkmann , David Miller , Jakub Kicinski , Martin KaFai Lau , LKML , netdev , Song Liu , syzkaller-bugs , Yonghong Song Subject: Re: general protection fault in process_one_work Message-ID: <20191029084517.GA24289@splinter> References: <0000000000001c46d5059608892f@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.12.1 (2019-06-15) Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On Tue, Oct 29, 2019 at 09:43:27AM +0100, Dmitry Vyukov wrote: > On Tue, Oct 29, 2019 at 9:38 AM syzbot > wrote: > > > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit: 38207291 bpf: Prepare btf_ctx_access for non raw_tp use case > > git tree: bpf-next > > console output: https://syzkaller.appspot.com/x/log.txt?x=14173c0f600000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=41648156aa09be10 > > dashboard link: https://syzkaller.appspot.com/bug?extid=9ed8f68ab30761f3678e > > compiler: gcc (GCC) 9.0.0 20181231 (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+9ed8f68ab30761f3678e@syzkaller.appspotmail.com > > +Jiří Pírko, this seems to be related to netdevsim. Will check it. > > > 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: 9149 Comm: kworker/1:3 Not tainted 5.4.0-rc1+ #0 > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > > Google 01/01/2011 > > Workqueue: events nsim_dev_trap_report_work > > RIP: 0010:nsim_dev_trap_report_work+0xc4/0xaf0 > > drivers/net/netdevsim/dev.c:409 > > Code: 89 45 d0 0f 84 8b 07 00 00 49 bc 00 00 00 00 00 fc ff df e8 3e ae ef > > fc 48 8b 45 d0 48 05 68 01 00 00 48 89 45 90 48 c1 e8 03 <42> 80 3c 20 00 > > 0f 85 b1 09 00 00 48 8b 45 d0 48 8b 98 68 01 00 00 > > RSP: 0018:ffff88806c98fc90 EFLAGS: 00010a06 > > RAX: 1bd5a0000000004d RBX: 0000000000000000 RCX: ffffffff84836e22 > > RDX: 0000000000000000 RSI: ffffffff84836db2 RDI: 0000000000000001 > > RBP: ffff88806c98fd30 R08: ffff88806c9863c0 R09: ffffed100d75f3d9 > > R10: ffffed100d75f3d8 R11: ffff88806baf9ec7 R12: dffffc0000000000 > > R13: ffff88806baf9ec0 R14: ffff8880a9a13900 R15: ffff8880ae934500 > > FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 00007efdd0c9e000 CR3: 000000009cc1b000 CR4: 00000000001406e0 > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > Call Trace: > > process_one_work+0x9af/0x1740 kernel/workqueue.c:2269 > > worker_thread+0x98/0xe40 kernel/workqueue.c:2415 > > kthread+0x361/0x430 kernel/kthread.c:255 > > ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 > > Modules linked in: > > ---[ end trace ba29cd1c27f63d86 ]--- > > RIP: 0010:nsim_dev_trap_report_work+0xc4/0xaf0 > > drivers/net/netdevsim/dev.c:409 > > Code: 89 45 d0 0f 84 8b 07 00 00 49 bc 00 00 00 00 00 fc ff df e8 3e ae ef > > fc 48 8b 45 d0 48 05 68 01 00 00 48 89 45 90 48 c1 e8 03 <42> 80 3c 20 00 > > 0f 85 b1 09 00 00 48 8b 45 d0 48 8b 98 68 01 00 00 > > RSP: 0018:ffff88806c98fc90 EFLAGS: 00010a06 > > RAX: 1bd5a0000000004d RBX: 0000000000000000 RCX: ffffffff84836e22 > > RDX: 0000000000000000 RSI: ffffffff84836db2 RDI: 0000000000000001 > > RBP: ffff88806c98fd30 R08: ffff88806c9863c0 R09: ffffed100d75f3d9 > > R10: ffffed100d75f3d8 R11: ffff88806baf9ec7 R12: dffffc0000000000 > > R13: ffff88806baf9ec0 R14: ffff8880a9a13900 R15: ffff8880ae934500 > > FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 00007efdd0c9e000 CR3: 000000009cc1b000 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#status for how to communicate with syzbot. > > > > -- > > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com. > > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/0000000000001c46d5059608892f%40google.com.