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=-0.7 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 579CDC43441 for ; Thu, 15 Nov 2018 07:49:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 20D7F21582 for ; Thu, 15 Nov 2018 07:49:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 20D7F21582 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 S1728863AbeKORzq (ORCPT ); Thu, 15 Nov 2018 12:55:46 -0500 Received: from mail-it1-f198.google.com ([209.85.166.198]:53026 "EHLO mail-it1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727067AbeKORzq (ORCPT ); Thu, 15 Nov 2018 12:55:46 -0500 Received: by mail-it1-f198.google.com with SMTP id o205so9900628itc.2 for ; Wed, 14 Nov 2018 23:49:03 -0800 (PST) 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=94Yz197PuQr99cZ/uprED/KGQpRDi+X2PIFZDpzwMWY=; b=qPOX/IK8ucdj7hMtcQOIh9fYbYwPSMWDwkgxOL2aEn/O642lSXbY9zKCPfY/hAua5X ZiGj1nBV7NsFemNj8OQ1m5QyIaIZ9n+QoyCuHNt3ds2ddhOsxQiz86w+JqFN3A7+ItE8 gTQa5PKEp+UA1s7HJZrYobPxFxhGNcbZ+j7B48/BWXdgTiIlNA5+TsiOmw3sVMyYEYmz eZcIzXnnmceLbCqCC7ZBQwW6JQAZAvwDNyjil3ZYV2xF0T2aLu0OyqmFZZQjzl2ZCQ8Q a7O7nJi5QXqmX1wdCuwLm1v38jq/cU35i57aj1weqwseJega2iL6YuZmc3LTN2vsACK6 LI2Q== X-Gm-Message-State: AGRZ1gIr19h5uY6IvfNgr7EwnXmxym+HBvKULnAl7nGhCU7+HAseOOoK PrlYaXS9p8zNqOQvQgBBaOo+WMtO3hrsKDQvfi32P3m19K7j X-Google-Smtp-Source: AJdET5dsv2u3JvtYBiQZK23fCwzooZldRMD3st+AgDyZjkZO0AB0oHvPH6Hy54JoDwu5y9Ywcdj7l3D85OGRhpqi87WBH1BKReEK MIME-Version: 1.0 X-Received: by 2002:a02:4f87:: with SMTP id r7-v6mr3787479jad.25.1542268142613; Wed, 14 Nov 2018 23:49:02 -0800 (PST) Date: Wed, 14 Nov 2018 23:49:02 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c9fe68057aaf48ff@google.com> Subject: WARNING in bpf_check (2) 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: ccda4af0f4b9 Linux 4.20-rc2 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=129edfbd400000 kernel config: https://syzkaller.appspot.com/x/.config?x=4a0a89f12ca9b0f5 dashboard link: https://syzkaller.appspot.com/bug?extid=4fc427c7af994b0948be compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=172b626d400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=148dcb0b400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+4fc427c7af994b0948be@syzkaller.appspotmail.com audit: type=1400 audit(1542221670.986:36): avc: denied { map } for pid=6270 comm="syz-executor244" path="/root/syz-executor244665442" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 ------------[ cut here ]------------ audit: type=1400 audit(1542221670.986:37): avc: denied { prog_load } for pid=6270 comm="syz-executor244" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 verifier bug. No program starts at insn 7 WARNING: CPU: 0 PID: 6270 at kernel/bpf/verifier.c:5880 jit_subprogs kernel/bpf/verifier.c:5879 [inline] WARNING: CPU: 0 PID: 6270 at kernel/bpf/verifier.c:5880 fixup_call_args kernel/bpf/verifier.c:6023 [inline] WARNING: CPU: 0 PID: 6270 at kernel/bpf/verifier.c:5880 bpf_check+0x5461/0x6310 kernel/bpf/verifier.c:6404 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 6270 Comm: syz-executor244 Not tainted 4.20.0-rc2+ #112 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+0x244/0x39d lib/dump_stack.c:113 panic+0x2ad/0x55c kernel/panic.c:188 __warn.cold.8+0x20/0x45 kernel/panic.c:540 report_bug+0x254/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969 RIP: 0010:jit_subprogs kernel/bpf/verifier.c:5879 [inline] RIP: 0010:fixup_call_args kernel/bpf/verifier.c:6023 [inline] RIP: 0010:bpf_check+0x5461/0x6310 kernel/bpf/verifier.c:6404 Code: b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 69 0b 00 00 8b 73 04 48 c7 c7 c0 ca 30 88 44 01 ee e8 4f 14 b9 ff <0f> 0b 48 8b 54 24 08 b8 ff ff 37 00 48 c1 e0 2a 48 c1 ea 03 0f b6 RSP: 0018:ffff8881c126f980 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffc90005e13040 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8165e7e5 RDI: 0000000000000005 RBP: ffff8881c126fb30 R08: ffff8881a322e0c0 R09: ffffed103b5c5020 R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: 0000000000000000 R13: 0000000000000002 R14: ffffc90005e13044 R15: ffff8881c0da6380 bpf_prog_load+0x113d/0x1cc0 kernel/bpf/syscall.c:1528 __do_sys_bpf kernel/bpf/syscall.c:2504 [inline] __se_sys_bpf kernel/bpf/syscall.c:2466 [inline] __x64_sys_bpf+0x36c/0x520 kernel/bpf/syscall.c:2466 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440159 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fff04546138 EFLAGS: 00000207 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440159 RDX: 0000000000000048 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000207 R12: 00000000004019e0 R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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