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 B4904C4332F for ; Sun, 6 Nov 2022 23:26:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229932AbiKFX0p (ORCPT ); Sun, 6 Nov 2022 18:26:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41432 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229941AbiKFX0l (ORCPT ); Sun, 6 Nov 2022 18:26:41 -0500 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0814364E6 for ; Sun, 6 Nov 2022 15:26:41 -0800 (PST) Received: by mail-io1-f72.google.com with SMTP id y5-20020a056602120500b006cf628c14ddso6201652iot.15 for ; Sun, 06 Nov 2022 15:26:40 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=g1YaNYCdo24vX+f9IK4Gqu+nnyXE2CukaBelu6GETlc=; b=sIUhvBQiA/tVbNpHtqE8WHY9f8icqL/pnmKBCPJx697Inc86cHzGbwQ+inz0UhkMwU QBs3Hi5KZH2vNrsYbbmE3/hdM1Ath7aaJIEgGgiB7D0yTOx0HGRFMvuvkXnHjzglpr6H iCJvK97ChjiKc6GEyVCbCyrDJtsgUReyyiejmTrcOUyyBaKhgyLvRwLePZSGAwg7nA96 kO/vHv/Zxrx7+3JcG3al8lse2/RhTsz4/qzMtqOiNRTBTQcN9fC5cOsPR8wBwIAoPCI2 31urSqP2knm2t5qA2Az1EA2iv9MESM0oYvKeiUP+1nInUXD8oXT5GNngyeS+rmUv2RRh 6iuw== X-Gm-Message-State: ACrzQf3kqpvKpg7CRU+kBLiIzvClSePYHRta4ZvoFD/vLIa2vLDwf0Ok vz9N1SGJZTYYL3YVLigg6oFtMi3Jf8Fue9T+JjJ96pomI/lm X-Google-Smtp-Source: AMsMyM6gkJ+m2iSL6eptVCxUdBe9QfRCvp7DplW7qrneq6rszdy7UuFsjNIeCwAO/TtmqQh5Qi732/JvKcWSvX/sj+VyI1QhAnus MIME-Version: 1.0 X-Received: by 2002:a02:742e:0:b0:375:a423:c6dd with SMTP id o46-20020a02742e000000b00375a423c6ddmr8083748jac.287.1667777200404; Sun, 06 Nov 2022 15:26:40 -0800 (PST) Date: Sun, 06 Nov 2022 15:26:40 -0800 In-Reply-To: <000000000000eb2d6c05e35a0d73@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000009842e105ecd5a37e@google.com> Subject: Re: [syzbot] memory leak in xas_create From: syzbot To: akpm@linux-foundation.org, code@siddh.me, deyu@sz.edu.cn, dvyukov@google.com, liam.howlett@oracle.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, shy828301@gmail.com, syzkaller-bugs@googlegroups.com, willy@infradead.org, zokeefe@google.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has found a reproducer for the following issue on: HEAD commit: 2f5065a0bc9d Merge tag 'acpi-6.1-rc4' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12351e76880000 kernel config: https://syzkaller.appspot.com/x/.config?x=7da85296f1024c6a dashboard link: https://syzkaller.appspot.com/bug?extid=a785d07959bc94837d51 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=110bbf39880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12fff099880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/2e34093711ff/disk-2f5065a0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/73117023c3a9/vmlinux-2f5065a0.xz kernel image: https://storage.googleapis.com/syzbot-assets/c708621825f8/bzImage-2f5065a0.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a785d07959bc94837d51@syzkaller.appspotmail.com write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory BUG: memory leak unreferenced object 0xffff88810fd216c0 (size 576): comm "syz-executor159", pid 3686, jiffies 4295064650 (age 50.150s) hex dump (first 32 bytes): 06 00 08 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 20 85 98 0f 81 88 ff ff d8 16 d2 0f 81 88 ff ff ............... backtrace: [] xas_alloc+0xf6/0x120 lib/xarray.c:377 [] xas_create+0x3b9/0x800 lib/xarray.c:679 [] xas_create_range+0xa0/0x1c0 lib/xarray.c:719 [] collapse_file+0x13c/0x2730 mm/khugepaged.c:1725 [] hpage_collapse_scan_file+0x418/0x9a0 mm/khugepaged.c:2156 [] madvise_collapse+0x211/0x5e0 mm/khugepaged.c:2611 [] madvise_vma_behavior+0x5dd/0x1030 mm/madvise.c:1076 [] madvise_walk_vmas+0x127/0x1d0 mm/madvise.c:1250 [] do_madvise.part.0+0x1c0/0x2b0 mm/madvise.c:1429 [] do_madvise mm/madvise.c:1440 [inline] [] __do_sys_madvise mm/madvise.c:1442 [inline] [] __se_sys_madvise mm/madvise.c:1440 [inline] [] __x64_sys_madvise+0x98/0xa0 mm/madvise.c:1440 [] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [] entry_SYSCALL_64_after_hwframe+0x63/0xcd BUG: memory leak unreferenced object 0xffff88810fd21480 (size 576): comm "syz-executor159", pid 3686, jiffies 4295064650 (age 50.150s) hex dump (first 32 bytes): 00 07 00 00 00 00 00 00 c0 16 d2 0f 81 88 ff ff ................ 20 85 98 0f 81 88 ff ff 98 14 d2 0f 81 88 ff ff ............... backtrace: [] xas_alloc+0xf6/0x120 lib/xarray.c:377 [] xas_create+0x3b9/0x800 lib/xarray.c:679 [] xas_create_range+0xa0/0x1c0 lib/xarray.c:719 [] collapse_file+0x13c/0x2730 mm/khugepaged.c:1725 [] hpage_collapse_scan_file+0x418/0x9a0 mm/khugepaged.c:2156 [] madvise_collapse+0x211/0x5e0 mm/khugepaged.c:2611 [] madvise_vma_behavior+0x5dd/0x1030 mm/madvise.c:1076 [] madvise_walk_vmas+0x127/0x1d0 mm/madvise.c:1250 [] do_madvise.part.0+0x1c0/0x2b0 mm/madvise.c:1429 [] do_madvise mm/madvise.c:1440 [inline] [] __do_sys_madvise mm/madvise.c:1442 [inline] [] __se_sys_madvise mm/madvise.c:1440 [inline] [] __x64_sys_madvise+0x98/0xa0 mm/madvise.c:1440 [] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [] entry_SYSCALL_64_after_hwframe+0x63/0xcd BUG: memory leak unreferenced object 0xffff88810fd21240 (size 576): comm "syz-executor159", pid 3686, jiffies 4295064650 (age 50.150s) hex dump (first 32 bytes): 00 06 00 00 00 00 00 00 c0 16 d2 0f 81 88 ff ff ................ 20 85 98 0f 81 88 ff ff 58 12 d2 0f 81 88 ff ff .......X....... backtrace: [] xas_alloc+0xf6/0x120 lib/xarray.c:377 [] xas_create+0x3b9/0x800 lib/xarray.c:679 [] xas_create_range+0xa0/0x1c0 lib/xarray.c:719 [] collapse_file+0x13c/0x2730 mm/khugepaged.c:1725 [] hpage_collapse_scan_file+0x418/0x9a0 mm/khugepaged.c:2156 [] madvise_collapse+0x211/0x5e0 mm/khugepaged.c:2611 [] madvise_vma_behavior+0x5dd/0x1030 mm/madvise.c:1076 [] madvise_walk_vmas+0x127/0x1d0 mm/madvise.c:1250 [] do_madvise.part.0+0x1c0/0x2b0 mm/madvise.c:1429 [] do_madvise mm/madvise.c:1440 [inline] [] __do_sys_madvise mm/madvise.c:1442 [inline] [] __se_sys_madvise mm/madvise.c:1440 [inline] [] __x64_sys_madvise+0x98/0xa0 mm/madvise.c:1440 [] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [] entry_SYSCALL_64_after_hwframe+0x63/0xcd BUG: memory leak unreferenced object 0xffff88810fd24d80 (size 576): comm "syz-executor159", pid 3686, jiffies 4295064650 (age 50.150s) hex dump (first 32 bytes): 00 05 00 00 00 00 00 00 c0 16 d2 0f 81 88 ff ff ................ 20 85 98 0f 81 88 ff ff 98 4d d2 0f 81 88 ff ff ........M...... backtrace: [] xas_alloc+0xf6/0x120 lib/xarray.c:377 [] xas_create+0x3b9/0x800 lib/xarray.c:679 [] xas_create_range+0xa0/0x1c0 lib/xarray.c:719 [] collapse_file+0x13c/0x2730 mm/khugepaged.c:1725 [] hpage_collapse_scan_file+0x418/0x9a0 mm/khugepaged.c:2156 [] madvise_collapse+0x211/0x5e0 mm/khugepaged.c:2611 [] madvise_vma_behavior+0x5dd/0x1030 mm/madvise.c:1076 [] madvise_walk_vmas+0x127/0x1d0 mm/madvise.c:1250 [] do_madvise.part.0+0x1c0/0x2b0 mm/madvise.c:1429 [] do_madvise mm/madvise.c:1440 [inline] [] __do_sys_madvise mm/madvise.c:1442 [inline] [] __se_sys_madvise mm/madvise.c:1440 [inline] [] __x64_sys_madvise+0x98/0xa0 mm/madvise.c:1440 [] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [] entry_SYSCALL_64_after_hwframe+0x63/0xcd write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory