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Tue, 09 Jan 2024 10:23:24 -0800 (PST) Date: Tue, 09 Jan 2024 10:23:24 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ef988f060e876862@google.com> Subject: [syzbot] [mm?] WARNING in hpage_collapse_scan_pmd From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: dzh13fdfzky9633aokg8dy8zn16hww4z X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: D3C83A001B X-Rspam-User: X-HE-Tag: 1704824604-854672 X-HE-Meta: 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 1MWYA8Nn 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 jLNeYjqN QTRY0ZxdZ4f5U66LEX5Tk82YeZxYnLSo9aw+WH6ZaCwqQuEgbtM1fkW9+LTF5ZXmwGMQC9HM9xXKZ9RpTy2pjOFE7Nii24Y75uVjvHNrv2ge3J3WHI1c/kPR7L68ajHpgG5qX9bVWaYpYD2zBN6BTtBKhDq+iIBxYzoUz1reQjuHf3kCS75yZPub/5wZkoXFve4JFYDOvorxNH7LKDpcQrcpBt+xOiTHLOj9utGtDAyN2WAxY7QJKhN44yr9vB0VOMX/P7Z06qBlkJrHLj4Redz5WPVvnasx5gRsurJ+Ex/EP7eFWFxT2xw1rlLzD8MQv+p4p/KlUG14JlTHUlWcBpVNj2g2lbEjhoKTKcCZRMM= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, syzbot found the following issue on: HEAD commit: 5eff55d725a4 Merge tag 'platform-drivers-x86-v6.7-7' of gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17472409e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=655f8abe9fe69b3b dashboard link: https://syzkaller.appspot.com/bug?extid=ed79e0896ae923de13fa compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/496bf4f0c628/disk-5eff55d7.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/43482bd7ec93/vmlinux-5eff55d7.xz kernel image: https://storage.googleapis.com/syzbot-assets/fa81d2743202/bzImage-5eff55d7.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ed79e0896ae923de13fa@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 35 at arch/x86/include/asm/pgtable.h:403 pte_uffd_wp arch/x86/include/asm/pgtable.h:403 [inline] WARNING: CPU: 1 PID: 35 at arch/x86/include/asm/pgtable.h:403 hpage_collapse_scan_pmd+0x233e/0x4fe0 mm/khugepaged.c:1309 Modules linked in: CPU: 1 PID: 35 Comm: khugepaged Not tainted 6.7.0-rc8-syzkaller-00055-g5eff55d725a4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:pte_uffd_wp arch/x86/include/asm/pgtable.h:403 [inline] RIP: 0010:hpage_collapse_scan_pmd+0x233e/0x4fe0 mm/khugepaged.c:1309 Code: 24 d8 00 00 00 49 81 c6 00 10 00 00 4c 3b b4 24 f0 00 00 00 0f 83 a8 06 00 00 e8 bd 72 9d ff e9 61 fc ff ff e8 b3 72 9d ff 90 <0f> 0b 90 41 bc 09 00 00 00 45 31 f6 e9 45 f4 ff ff e8 9c 72 9d ff RSP: 0018:ffffc90000abf780 EFLAGS: 00010293 RAX: ffffffff81f1073d RBX: 0000000000000002 RCX: ffff8880142f1dc0 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffc90000abfbf0 R08: ffffffff81f0ea47 R09: 1ffffd400022a006 R10: dffffc0000000000 R11: fffff9400022a007 R12: 00000000203ea000 R13: 1ffff92000157f14 R14: 00000000455eac67 R15: 00000000000001ea FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f942157a038 CR3: 000000008cd03000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: khugepaged_scan_mm_slot mm/khugepaged.c:2415 [inline] khugepaged_do_scan mm/khugepaged.c:2503 [inline] khugepaged+0x9bf/0x17a0 mm/khugepaged.c:2559 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 --- 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. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup