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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BCBA6C433FE for ; Fri, 4 Nov 2022 14:54:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231857AbiKDOyu (ORCPT ); Fri, 4 Nov 2022 10:54:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39552 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229548AbiKDOyr (ORCPT ); Fri, 4 Nov 2022 10:54:47 -0400 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F3D3B2C67D for ; Fri, 4 Nov 2022 07:54:46 -0700 (PDT) Received: by mail-il1-f200.google.com with SMTP id x6-20020a056e021ca600b002ffe4b15419so3978809ill.4 for ; Fri, 04 Nov 2022 07:54:46 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=drddh3mL0z4vEtMFLWh/GDM23ivjXc1rJj9XAt34JSE=; b=gtz7BcpvVkMvr28fUt6nHR9498odEuKKBGrQ7brpHLw+O732UhnGPix5wt2aK/ge5O GoA4A+a1eHFwy113N7xCigjqSwbG3l+Iu3pZml2pgjxNfasjf5ZPhD9QGO5vi8FyvpTD rTCtUQNkYtdGlmjM4c5GjTvzlV9ogxqsRIMs/dxk3mO0DTrrmSo/q/o8iPCdzGYIJGFa UICu+Rkad4KNkBEX+RH1xc9I2nvubs6rpCQlqwIUiNAY/byA8kvAxx9nL+StYbnaBAsT /kf47x4tKXRhjGjg1B8yeJS8szWOzc763yXAv9dZEYI7Cw9GbZzz4SLgQfjuq1wZ6pWl xIzw== X-Gm-Message-State: ACrzQf20+H3pd94+oBZWWVNaCfayqx2F0Jj6zaExXZez1c+U+Ow0y8q2 50wN6ORciVUrKl9+OvgwPvrP+jZYv0tbAQPWep/EYLgF2sWZ X-Google-Smtp-Source: AMsMyM46qCQgAyWlhHt4SM/eJE7JQVjnZ45E3/18Hnf3CfeMX4hZJ7Uw0S6/oWdckqTycoO8PfmgWaPePiXMd/A/geLezZql2Gkv MIME-Version: 1.0 X-Received: by 2002:a92:b704:0:b0:300:9ad3:a7b2 with SMTP id k4-20020a92b704000000b003009ad3a7b2mr19826485ili.65.1667573686334; Fri, 04 Nov 2022 07:54:46 -0700 (PDT) Date: Fri, 04 Nov 2022 07:54:46 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000035fba305eca64106@google.com> Subject: [syzbot] BUG: unable to handle kernel paging request in get_desc From: syzbot To: bp@alien8.de, brgerst@gmail.com, dave.hansen@linux.intel.com, hpa@zytor.com, kirill@shutemov.name, linux-kernel@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, thomas.lendacky@amd.com, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 81214a573d19 Add linux-next specific files for 20221103 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=132019de880000 kernel config: https://syzkaller.appspot.com/x/.config?x=cdc625e9234bac0 dashboard link: https://syzkaller.appspot.com/bug?extid=ffb4f000dc2872c93f62 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12dd52ca880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5d4dda497754/disk-81214a57.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9658efff160a/vmlinux-81214a57.xz kernel image: https://storage.googleapis.com/syzbot-assets/3711180f2565/bzImage-81214a57.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ffb4f000dc2872c93f62@syzkaller.appspotmail.com BUG: unable to handle page fault for address: fffffbc5a1c22e00 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23ffe4067 P4D 23ffe4067 PUD 13ff2d067 PMD 13ff2c067 PTE 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 5368 Comm: syz-executor.2 Not tainted 6.1.0-rc3-next-20221103-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 RIP: 0010:get_desc+0x128/0x460 arch/x86/lib/insn-eval.c:660 Code: de 02 00 00 83 e0 07 38 c2 0f 9e c1 84 d2 0f 95 c0 84 c1 0f 85 c9 02 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 d8 48 c1 e8 03 <0f> b6 0c 10 48 8d 43 07 48 89 c6 48 c1 ee 03 0f b6 14 16 48 89 de RSP: 0018:ffffc9000431fd08 EFLAGS: 00010a06 RAX: 1fffffc5a1c22e00 RBX: fffffe2d0e117000 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000006 RBP: ffffc9000431fdc0 R08: 0000000000000006 R09: 000000000000007f R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff92000863fa1 R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000007f FS: 00007f250ff0e700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbc5a1c22e00 CR3: 0000000028c1f000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: insn_get_seg_base arch/x86/lib/insn-eval.c:725 [inline] insn_get_effective_ip+0x187/0x1f0 arch/x86/lib/insn-eval.c:1476 fixup_iopl_exception+0xd0/0x190 arch/x86/kernel/traps.c:627 __exc_general_protection arch/x86/kernel/traps.c:752 [inline] exc_general_protection+0x176/0x210 arch/x86/kernel/traps.c:728 asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:564 RIP: 0003:0x7f250f3abf8c Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 <00> 00 00 00 48 00 e0 0e 25 7f 00 00 ff ff ff ff ff ff ff ff 01 00 RSP: 0003:00007f250f3abf80 EFLAGS: 00010e96 RAX: 000000003ac744f0 RBX: 0000000000000000 RCX: 00007f250f3abf88 RDX: 0000000000000038 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007f250f3abf80 R10: 0000000000000000 R11: ffffffff00000b5e R12: 00007f250f3abfb0 R13: 00007f250f360680 R14: 0000000000000038 R15: 000000003acf0fd6 Modules linked in: CR2: fffffbc5a1c22e00 ---[ end trace 0000000000000000 ]--- RIP: 0010:get_desc+0x128/0x460 arch/x86/lib/insn-eval.c:660 Code: de 02 00 00 83 e0 07 38 c2 0f 9e c1 84 d2 0f 95 c0 84 c1 0f 85 c9 02 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 d8 48 c1 e8 03 <0f> b6 0c 10 48 8d 43 07 48 89 c6 48 c1 ee 03 0f b6 14 16 48 89 de RSP: 0018:ffffc9000431fd08 EFLAGS: 00010a06 RAX: 1fffffc5a1c22e00 RBX: fffffe2d0e117000 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000006 RBP: ffffc9000431fdc0 R08: 0000000000000006 R09: 000000000000007f R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff92000863fa1 R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000007f FS: 00007f250ff0e700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbc5a1c22e00 CR3: 0000000028c1f000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: de 02 fiadds (%rdx) 2: 00 00 add %al,(%rax) 4: 83 e0 07 and $0x7,%eax 7: 38 c2 cmp %al,%dl 9: 0f 9e c1 setle %cl c: 84 d2 test %dl,%dl e: 0f 95 c0 setne %al 11: 84 c1 test %al,%cl 13: 0f 85 c9 02 00 00 jne 0x2e2 19: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 20: fc ff df 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 0f b6 0c 10 movzbl (%rax,%rdx,1),%ecx <-- trapping instruction 2e: 48 8d 43 07 lea 0x7(%rbx),%rax 32: 48 89 c6 mov %rax,%rsi 35: 48 c1 ee 03 shr $0x3,%rsi 39: 0f b6 14 16 movzbl (%rsi,%rdx,1),%edx 3d: 48 89 de mov %rbx,%rsi --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches