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_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 3B5BFC0044D for ; Wed, 4 Dec 2019 08:15:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 11160206DF for ; Wed, 4 Dec 2019 08:15:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727317AbfLDIPK (ORCPT ); Wed, 4 Dec 2019 03:15:10 -0500 Received: from mail-il1-f198.google.com ([209.85.166.198]:36813 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726166AbfLDIPJ (ORCPT ); Wed, 4 Dec 2019 03:15:09 -0500 Received: by mail-il1-f198.google.com with SMTP id v15so667930iln.3 for ; Wed, 04 Dec 2019 00:15:09 -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=3gxsHwvlUUBpSvK315i8o2sg/roLIxlVFL41wPQysKk=; b=tMGtyM5zRqN/2ldVc8YwWOEFcomerFCf/TPqIut0EcuBSOvN4I7tJNpq9qM03d8LFT Qu2PZI0mFg/Ljw54MjXmQdbsZP1Rv2GzFre5SJ1096enbheJffJ8dMhSrJ/abbm46q8P 5B8HdYlNZ6fHF5qKv5f25kEATVuoW87Kz3JEW1r9FNPdsHIkPutyf3pibhI0XHFkrs8q rgB/e1RKNvels449+rLA/Rlmu1uamjIi2F62cyoMtqfYh634T4aLgVGaJeUIC+Sg1Spn BBJZUxTX86q5zLyE2Pr7g+jhIMCTzKemNyKlzdRmCOloBdIF/XPs5KVml+VBBwSTtM6f 5e9Q== X-Gm-Message-State: APjAAAXdNM4sR5B09BL7691DqdtoiwSXZ5MNivTK/RLQIPOxAXUnUozx 2zOmIFNJEIyrQULGFqsh9tPgXKR1x3VJQYpzDHf8nn6b45VZ X-Google-Smtp-Source: APXvYqzIxmgXZ1QBxq9xD17imaY7z6J5sKHlCL+TCugehyRVkX/brVHwcBEz4gS5IceA/HyMOfHDPcia0dyBirhn7V2aKi4P33dF MIME-Version: 1.0 X-Received: by 2002:a02:a148:: with SMTP id m8mr1878744jah.69.1575447308616; Wed, 04 Dec 2019 00:15:08 -0800 (PST) Date: Wed, 04 Dec 2019 00:15:08 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000314c120598dc69bd@google.com> Subject: BUG: unable to handle kernel paging request in pcpu_alloc From: syzbot To: andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, kafai@fb.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, yhs@fb.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 1ab75b2e Add linux-next specific files for 20191203 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=10edf2eae00000 kernel config: https://syzkaller.appspot.com/x/.config?x=de1505c727f0ec20 dashboard link: https://syzkaller.appspot.com/bug?extid=82e323920b78d54aaed5 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=156ef061e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11641edae00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+82e323920b78d54aaed5@syzkaller.appspotmail.com RDX: 000000000000003c RSI: 0000000020000080 RDI: 0c00000000000000 RBP: 0000000000000000 R08: 0000000000000002 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000018 R13: 0000000000000004 R14: 0000000000000005 R15: 0000000000000000 BUG: unable to handle page fault for address: fffff91ffff00000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 21ffe6067 P4D 21ffe6067 PUD aa56c067 PMD aa56d067 PTE 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8999 Comm: syz-executor865 Not tainted 5.4.0-next-20191203-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:memory_is_nonzero mm/kasan/generic.c:121 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:135 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:166 [inline] RIP: 0010:check_memory_region_inline mm/kasan/generic.c:182 [inline] RIP: 0010:check_memory_region+0x9c/0x1a0 mm/kasan/generic.c:192 Code: c9 4d 0f 49 c1 49 c1 f8 03 45 85 c0 0f 84 10 01 00 00 41 83 e8 01 4e 8d 44 c0 08 eb 0d 48 83 c0 08 4c 39 c0 0f 84 a7 00 00 00 <48> 83 38 00 74 ed 4c 8d 40 08 eb 09 48 83 c0 01 49 39 c0 74 53 80 RSP: 0018:ffffc90001f67a80 EFLAGS: 00010216 RAX: fffff91ffff00000 RBX: fffff91ffff01000 RCX: ffffffff819e1589 RDX: 0000000000000001 RSI: 0000000000008000 RDI: ffffe8ffff800000 RBP: ffffc90001f67a98 R08: fffff91ffff01000 R09: 0000000000001000 R10: fffff91ffff00fff R11: ffffe8ffff807fff R12: fffff91ffff00000 R13: 0000000000008000 R14: 0000000000000000 R15: ffff88821fffd100 FS: 00000000011a7880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff91ffff00000 CR3: 00000000a94ad000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: memset+0x24/0x40 mm/kasan/common.c:107 memset include/linux/string.h:410 [inline] pcpu_alloc+0x589/0x1380 mm/percpu.c:1734 __alloc_percpu_gfp+0x28/0x30 mm/percpu.c:1783 bpf_array_alloc_percpu kernel/bpf/arraymap.c:35 [inline] array_map_alloc+0x698/0x7d0 kernel/bpf/arraymap.c:159 find_and_alloc_map kernel/bpf/syscall.c:123 [inline] map_create kernel/bpf/syscall.c:654 [inline] __do_sys_bpf+0x478/0x3810 kernel/bpf/syscall.c:3012 __se_sys_bpf kernel/bpf/syscall.c:2989 [inline] __x64_sys_bpf+0x73/0xb0 kernel/bpf/syscall.c:2989 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x442f99 Code: e8 ec 09 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 cb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffc8aa156d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442f99 RDX: 000000000000003c RSI: 0000000020000080 RDI: 0c00000000000000 RBP: 0000000000000000 R08: 0000000000000002 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000018 R13: 0000000000000004 R14: 0000000000000005 R15: 0000000000000000 Modules linked in: CR2: fffff91ffff00000 ---[ end trace 449f8b43dad6ffb8 ]--- RIP: 0010:memory_is_nonzero mm/kasan/generic.c:121 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:135 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:166 [inline] RIP: 0010:check_memory_region_inline mm/kasan/generic.c:182 [inline] RIP: 0010:check_memory_region+0x9c/0x1a0 mm/kasan/generic.c:192 Code: c9 4d 0f 49 c1 49 c1 f8 03 45 85 c0 0f 84 10 01 00 00 41 83 e8 01 4e 8d 44 c0 08 eb 0d 48 83 c0 08 4c 39 c0 0f 84 a7 00 00 00 <48> 83 38 00 74 ed 4c 8d 40 08 eb 09 48 83 c0 01 49 39 c0 74 53 80 RSP: 0018:ffffc90001f67a80 EFLAGS: 00010216 RAX: fffff91ffff00000 RBX: fffff91ffff01000 RCX: ffffffff819e1589 RDX: 0000000000000001 RSI: 0000000000008000 RDI: ffffe8ffff800000 RBP: ffffc90001f67a98 R08: fffff91ffff01000 R09: 0000000000001000 R10: fffff91ffff00fff R11: ffffe8ffff807fff R12: fffff91ffff00000 R13: 0000000000008000 R14: 0000000000000000 R15: ffff88821fffd100 FS: 00000000011a7880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff91ffff00000 CR3: 00000000a94ad000 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. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches