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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 CA572C433E2 for ; Sat, 11 Jul 2020 06:55:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A45222075F for ; Sat, 11 Jul 2020 06:55:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728167AbgGKGzV (ORCPT ); Sat, 11 Jul 2020 02:55:21 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:33269 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728041AbgGKGzU (ORCPT ); Sat, 11 Jul 2020 02:55:20 -0400 Received: by mail-io1-f72.google.com with SMTP id a12so5020256ioo.0 for ; Fri, 10 Jul 2020 23:55:19 -0700 (PDT) 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=+dz85Sf0hRZ/UgjIsHMdP1g1MRjmFGmwDieydsvrQOk=; b=dlfkvTvj7mFh1C5XgFH7nOd+gIsn/Bqn+SAYvFeS3qqD4gIwVo/GLAC0/dzoAt8eNu XGggu6oebzmPR7aHb+02FSliDZ0pBuou432k/hQ1KEbck63PFXnddxDQQ9fz/ruqIrcK 2pyCow2t07/6DYRMwqW2oC2i7WxwkxlKx0Vnklj6dlM6sIJWHt/ivfFyZ7edJPSfiO9X iV0FvMLIviFRhw+4YyzQ7siK3+9WUpAE+adOOFetZhdioO3IAKw9h7XpRil+HKoinopw 7SAQ+XSxdp0vQflfIOTSNjTheyXWRpuxIQKDf5hqQtgBun+Xh7a1NQbtuS/ze7XU3GNJ foDw== X-Gm-Message-State: AOAM533nbUPrelk1h8/l0M2t8vb3B5WX4nV3RlHKWw/NlEbqo7P73Yrw rema0oPQ+MBXzn9o7o/leqJqRezG74o9V/Dj32HNy9at3ozZ X-Google-Smtp-Source: ABdhPJyuoiyF2Hi/zB2jC9J3N7RUUrUrDxIu/t2RdVsun9X1Al2bnspROLoTsGxlWPCV0Wlwsa59jhdZSe131eIfZeqwHwYfVu6W MIME-Version: 1.0 X-Received: by 2002:a02:9642:: with SMTP id c60mr80203032jai.71.1594450519081; Fri, 10 Jul 2020 23:55:19 -0700 (PDT) Date: Fri, 10 Jul 2020 23:55:19 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000cd4de605aa24f03c@google.com> Subject: BUG: stack guard page was hit in no_context From: syzbot To: andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, jeyu@kernel.org, john.fastabend@gmail.com, kafai@fb.com, kpsingh@chromium.org, 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" 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: 7cc2a8ea Merge tag 'block-5.8-2020-07-01' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15dd7d83100000 kernel config: https://syzkaller.appspot.com/x/.config?x=7be693511b29b338 dashboard link: https://syzkaller.appspot.com/bug?extid=b344c6786fc0f8409a1c compiler: gcc (GCC) 10.1.0-syz 20200507 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+b344c6786fc0f8409a1c@syzkaller.appspotmail.com BUG: stack guard page was hit at 000000006422ef1c (stack is 000000009e8a746a..00000000d32e48ea) kernel stack overflow (double-fault): 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8234 Comm: kworker/u4:8 Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_purge_orig RIP: 0010:no_context+0x33/0x9f0 arch/x86/mm/fault.c:584 Code: fc ff df 41 56 41 89 ce 41 55 49 89 f5 41 54 49 89 d4 55 48 89 fd 53 48 8d 9d 88 00 00 00 48 81 ec d0 00 00 00 48 8d 44 24 30 <44> 89 44 24 10 48 c7 44 24 30 b3 8a b5 41 48 c1 e8 03 48 89 04 24 RSP: 0018:ffffc9001642ffe8 EFLAGS: 00010086 RAX: ffffc90016430018 RBX: ffffc90016430280 RCX: 000000000000000b RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffffc900164301f8 RBP: ffffc900164301f8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000002 R14: 000000000000000b R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9001642ffd8 CR3: 0000000025a2b000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __bad_area_nosemaphore+0xa9/0x480 arch/x86/mm/fault.c:789 do_user_addr_fault+0x783/0xd00 arch/x86/mm/fault.c:1171 handle_page_fault arch/x86/mm/fault.c:1365 [inline] exc_page_fault+0xab/0x170 arch/x86/mm/fault.c:1418 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:565 RIP: 0010:preempt_schedule_thunk+0x0/0x18 arch/x86/entry/thunk_64.S:40 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 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 RSP: 0018:ffffc900164302a8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffc900164305b0 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83967dab RDI: 0000000000000001 RBP: ffffffff810078f7 R08: ffffffff83ad5e30 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 000000000000000e R14: 0000000000000002 R15: 0000000000000000 search_module_extables+0xce/0x100 kernel/module.c:4422 search_exception_tables+0x42/0x50 kernel/extable.c:59 fixup_exception+0x4b/0xca arch/x86/mm/extable.c:161 no_context+0xe7/0x9f0 arch/x86/mm/fault.c:599 __bad_area_nosemaphore+0xa9/0x480 arch/x86/mm/fault.c:789 do_user_addr_fault+0x783/0xd00 arch/x86/mm/fault.c:1171 handle_page_fault arch/x86/mm/fault.c:1365 [inline] exc_page_fault+0xab/0x170 arch/x86/mm/fault.c:1418 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:565 RIP: 0010:preempt_schedule_thunk+0x0/0x18 arch/x86/entry/thunk_64.S:40 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 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 RSP: 0018:ffffc900164305d8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffc900164308e0 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83967dab RDI: 0000000000000001 RBP: ffffffff810078f7 R08: ffffffff83ad5e30 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 000000000000000e R14: 0000000000000002 R15: 0000000000000000 search_module_extables+0xce/0x100 kernel/module.c:4422 search_exception_tables+0x42/0x50 kernel/extable.c:59 fixup_exception+0x4b/0xca arch/x86/mm/extable.c:161 no_context+0xe7/0x9f0 arch/x86/mm/fault.c:599 __bad_area_nosemaphore+0xa9/0x480 arch/x86/mm/fault.c:789 do_user_addr_fault+0x783/0xd00 arch/x86/mm/fault.c:1171 handle_page_fault arch/x86/mm/fault.c:1365 [inline] exc_page_fault+0xab/0x170 arch/x86/mm/fault.c:1418 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:565 RIP: 0010:preempt_schedule_thunk+0x0/0x18 arch/x86/entry/thunk_64.S:40 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 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 RSP: 0018:ffffc90016430908 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffc90016430c10 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83967dab RDI: 0000000000000001 RBP: ffffffff810078f7 R08: ffffffff83ad5e30 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 000000000000000e R14: 0000000000000002 R15: 0000000000000000 search_module_extables+0xce/0x100 kernel/module.c:4422 search_exception_tables+0x42/0x50 kernel/extable.c:59 fixup_exception+0x4b/0xca arch/x86/mm/extable.c:161 no_context+0xe7/0x9f0 arch/x86/mm/fault.c:599 __bad_area_nosemaphore+0xa9/0x480 arch/x86/mm/fault.c:789 do_user_addr_fault+0x783/0xd00 arch/x86/mm/fault.c:1171 handle_page_fault arch/x86/mm/fault.c:1365 [inline] exc_page_fault+0xab/0x170 arch/x86/mm/fault.c:1418 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:565 RIP: 0010:preempt_schedule_thunk+0x0/0x18 arch/x86/entry/thunk_64.S:40 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 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 RSP: 0018:ffffc90016430c38 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffc90016430f40 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83967dab RDI: 0000000000000001 RBP: ffffffff810078f7 R08: ffffffff83ad5e30 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 000000000000000e R14: 0000000000000002 R15: 0000000000000000 search_module_extables+0xce/0x100 kernel/module.c:4422 search_exception_tables+0x42/0x50 kernel/extable.c:59 fixup_exception+0x4b/0xca arch/x86/mm/extable.c:161 no_context+0xe7/0x9f0 arch/x86/mm/fault.c:599 __bad_area_nosemaphore+0xa9/0x480 arch/x86/mm/fault.c:789 do_user_addr_fault+0x783/0xd00 arch/x86/mm/fault.c:1171 handle_page_fault arch/x86/mm/fault.c:1365 [inline] exc_page_fault+0xab/0x170 arch/x86/mm/fault.c:1418 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:565 RIP: 0010:preempt_schedule_thunk+0x0/0x18 arch/x86/entry/thunk_64.S:40 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 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 RSP: 0018:ffffc90016430f68 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffc90016431270 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83967dab RDI: 0000000000000001 RBP: ffffffff810078f7 R08: ffffffff83ad5e30 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 000000000000000e R14: 0000000000000002 R15: 0000000000000000 search_module_extables+0xce/0x100 kernel/module.c:4422 search_exception_tables+0x42/0x50 kernel/extable.c:59 fixup_exception+0x4b/0xca arch/x86/mm/extable.c:161 no_context+0xe7/0x9f0 arch/x86/mm/fault.c:599 __bad_area_nosemaphore+0xa9/0x480 arch/x86/mm/fault.c:789 do_user_addr_fault+0x783/0xd00 arch/x86/mm/fault.c:1171 handle_page_fault arch/x86/mm/fault.c:1365 [inline] exc_page_fault+0xab/0x170 arch/x86/mm/fault.c:1418 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:565 RIP: 0010:preempt_schedule_thunk+0x0/0x18 arch/x86/entry/thunk_64.S:40 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 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 RSP: 0018:ffffc90016431298 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffc900164315a0 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83967dab RDI: 0000000000000001 RBP: ffffffff810078f7 R08: ffffffff83ad5e30 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 000000000000000e R14: 0000000000000002 R15: 0000000000000000 search_module_extables+0xce/0x100 kernel/module.c:4422 search_exception_tables+0x42/0x50 kernel/extable.c:59 fixup_exception+0x4b/0xca arch/x86/mm/extable.c:161 no_context+0xe7/0x9f0 arch/x86/mm/fault.c:599 __bad_area_nosemaphore+0xa9/0x480 arch/x86/mm/fault.c:789 do_user_addr_fault+0x783/0xd00 arch/x86/mm/fault.c:1171 handle_page_fault arch/x86/mm/fault.c:1365 [inline] exc_page_fault+0xab/0x170 arch/x86/mm/fault.c:1418 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:565 RIP: 0010:preempt_schedule_thunk+0x0/0x18 arch/x86/entry/thunk_64.S:40 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 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 RSP: 0 Lost 828 message(s)! ---[ end trace ec14fcfb6d9859f3 ]--- RIP: 0010:no_context+0x33/0x9f0 arch/x86/mm/fault.c:584 Code: fc ff df 41 56 41 89 ce 41 55 49 89 f5 41 54 49 89 d4 55 48 89 fd 53 48 8d 9d 88 00 00 00 48 81 ec d0 00 00 00 48 8d 44 24 30 <44> 89 44 24 10 48 c7 44 24 30 b3 8a b5 41 48 c1 e8 03 48 89 04 24 RSP: 0018:ffffc9001642ffe8 EFLAGS: 00010086 RAX: ffffc90016430018 RBX: ffffc90016430280 RCX: 000000000000000b RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffffc900164301f8 RBP: ffffc900164301f8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000002 R14: 000000000000000b R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9001642ffd8 CR3: 0000000025a2b000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug is generated by a bot. 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