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=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 E7C32C433E1 for ; Sat, 11 Jul 2020 07:10:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C32A02065F for ; Sat, 11 Jul 2020 07:10:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728149AbgGKHKY (ORCPT ); Sat, 11 Jul 2020 03:10:24 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:52146 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726900AbgGKHKX (ORCPT ); Sat, 11 Jul 2020 03:10:23 -0400 Received: by mail-io1-f70.google.com with SMTP id l1so4992231ioh.18 for ; Sat, 11 Jul 2020 00:10:22 -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=h3Vk3eXrn0y01MLjSo8olxdAopheGwFN2NEb7CEvUTw=; b=bfzxFud139/dlayeqV1JU3x5xbk6177LvHmjRlC1wzsabY2GIu9kb7FWlEv4WzJ8y5 /sED2AVZk/T3mFNwPFIDRLyHDJKiHDSrDOkhLy+xkqK5GrSox2AorVLsPL9TTTankJll yRV+2QGoqekXvG+dXDDPhN/113TBPhRMKUbxZ9Bc6ZLPmEifxOylimJ3iV21DxtohB17 EvNgz9pL0oEJafVBqHbfuZDfzPiVQvJjTxk9maWpbsQQUT0FcoXwmSBfwiT7Bol4CusQ 8TkRy6bl0udaoljhDNaIw7iLzptgyW7CCEmZXhSAw4+J6jeztHhXa+PlnUm3xK79Msg+ fMEQ== X-Gm-Message-State: AOAM5321zsquL5KrjGNsndRnvKao8qk8r4diMs2mqzlA2GvhN9dv8Drr ePaBBsSehEZzzuFTTt0jE3qF5mCYqONydGxF4bugvijekaVZ X-Google-Smtp-Source: ABdhPJzax6znZAv2hvNDOtRdoAjHgnVFFNQyqkh990TTAPygXRT+/CoBEwQynS0a+/LtcCb7rmCdEGVuz0xUTKURH9cQT1ZzwQsM MIME-Version: 1.0 X-Received: by 2002:a02:a909:: with SMTP id n9mr76315786jam.70.1594451422409; Sat, 11 Jul 2020 00:10:22 -0700 (PDT) Date: Sat, 11 Jul 2020 00:10:22 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a4fd8105aa252630@google.com> Subject: BUG: stack guard page was hit in fixup_exception From: syzbot To: bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Content-Type: text/plain; charset="UTF-8" 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: 42f82040 Merge tag 'drm-fixes-2020-07-10' of git://anongit.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12d80333100000 kernel config: https://syzkaller.appspot.com/x/.config?x=66ad203c2bb6d8b dashboard link: https://syzkaller.appspot.com/bug?extid=3370f8260246b965fefd 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+3370f8260246b965fefd@syzkaller.appspotmail.com BUG: stack guard page was hit at 000000004cbdbd91 (stack is 00000000e7fa34ab..000000001a32f95e) kernel stack overflow (double-fault): 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 11649 Comm: kworker/u4:5 Not tainted 5.8.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:fixup_exception+0x0/0xca arch/x86/mm/extable.c:143 Code: 5d 41 5c c3 e8 b1 9f 3f 00 45 31 e4 5b 44 89 e0 5d 41 5c c3 48 89 ef e8 9e f8 7e 00 eb c7 66 90 66 2e 0f 1f 84 00 00 00 00 00 <41> 57 49 89 cf 41 56 49 89 d6 41 55 41 89 f5 41 54 49 89 fc 55 53 RSP: 0018:ffffc90001810000 EFLAGS: 00010093 RAX: 0000000000000000 RBX: ffffc900018102a0 RCX: 0000000000000000 RDX: 0000000000000002 RSI: 000000000000000e RDI: ffffc90001810218 RBP: ffffc90001810218 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000002 R14: 000000000000000b R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9000180fff8 CR3: 000000008749d000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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:544 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:ffffc900018102c8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffc900018105d0 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83968d3b RDI: 0000000000000001 RBP: ffffffff810078f7 R08: ffffffff83ad6dc0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 000000000000000e R14: 0000000000000002 R15: 0000000000000000 search_module_extables+0xce/0x100 kernel/module.c:4425 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:544 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:ffffc900018105f8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffc90001810900 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83968d3b RDI: 0000000000000001 RBP: ffffffff810078f7 R08: ffffffff83ad6dc0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 000000000000000e R14: 0000000000000002 R15: 0000000000000000 search_module_extables+0xce/0x100 kernel/module.c:4425 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:544 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:ffffc90001810928 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffc90001810c30 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83968d3b RDI: 0000000000000001 RBP: ffffffff810078f7 R08: ffffffff83ad6dc0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 000000000000000e R14: 0000000000000002 R15: 0000000000000000 search_module_extables+0xce/0x100 kernel/module.c:4425 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:544 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:ffffc90001810c58 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffc90001810f60 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83968d3b RDI: 0000000000000001 RBP: ffffffff810078f7 R08: ffffffff83ad6dc0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 000000000000000e R14: 0000000000000002 R15: 0000000000000000 search_module_extables+0xce/0x100 kernel/module.c:4425 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:544 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:ffffc90001810f88 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffc90001811290 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83968d3b RDI: 0000000000000001 RBP: ffffffff810078f7 R08: ffffffff83ad6dc0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 000000000000000e R14: 0000000000000002 R15: 0000000000000000 search_module_extables+0xce/0x100 kernel/module.c:4425 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:544 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:ffffc900018112b8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffc900018115c0 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff83968d3b RDI: 0000000000000001 RBP: ffffffff810078f7 R08: ffffffff83ad6dc0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 000000000000000e R14: 0000000000000002 R15: 0000000000000000 search_module_extables+0xce/0x100 kernel/module.c:4425 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:544 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 Lost 823 message(s)! ---[ end trace 7175130f674c1b3d ]--- RIP: 0010:fixup_exception+0x0/0xca arch/x86/mm/extable.c:143 Code: 5d 41 5c c3 e8 b1 9f 3f 00 45 31 e4 5b 44 89 e0 5d 41 5c c3 48 89 ef e8 9e f8 7e 00 eb c7 66 90 66 2e 0f 1f 84 00 00 00 00 00 <41> 57 49 89 cf 41 56 49 89 d6 41 55 41 89 f5 41 54 49 89 fc 55 53 RSP: 0018:ffffc90001810000 EFLAGS: 00010093 RAX: 0000000000000000 RBX: ffffc900018102a0 RCX: 0000000000000000 RDX: 0000000000000002 RSI: 000000000000000e RDI: ffffc90001810218 RBP: ffffc90001810218 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000002 R14: 000000000000000b R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9000180fff8 CR3: 000000008749d000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug is generated by a bot. 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