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vz9N1SGJZTYYL3YVLigg6oFtMi3Jf8Fue9T+JjJ96pomI/lm 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" X-Spam-Status: No, score=0.9 required=5.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2, SORTED_RECIPS,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net 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