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Wed, 02 Aug 2023 00:23:05 -0700 (PDT) Date: Wed, 02 Aug 2023 00:23:05 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e44f2b0601eb8820@google.com> Subject: [syzbot] [mm?] WARNING in try_to_migrate_one 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: cwizfpxo5ifm83yr6ffanf8qaiko1ygt X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: DFB8F100015 X-Rspam-User: X-HE-Tag: 1690960986-598371 X-HE-Meta: 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 YhaB9Uh1 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 ZiI1ps9T oQyr/i1gO4wQxsKWBpFxEpRgJWZP9rklxHIGQSaRlYiVx8LZj8qlVgfnAJDUJPz1zDzYabnFl7rHIuygDOtQjxBSOECS/1VWMNhLpLJYhuZRnOdCp2H7QBWBC7NLUD6CdbPDU+oVTqmwMUFTX+rGU6DuTWhE38REBBxN9V7ncnMIeybUXocDQGIguUCLyglQU0b7eNnnh2hzSCjtVl87n7h9g7DEsZ5CN96CnNbuvb1Gfj5122U+k9djcsjALksdmCyKEb13MbeOD10qdTQasywdguqaebZHmilLH1umyblqokKQbu+Ia7AU6zpk2nWN2iyvS8a4dE7mPULK2mBiuLOk62HZ7s40nfS5YYmOY3Y= 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: Hello, syzbot found the following issue on: HEAD commit: f837f0a3c948 Merge tag 'arm64-fixes' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12e64c61a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=5d10d93e1ae1f229 dashboard link: https://syzkaller.appspot.com/bug?extid=94d51f4b3c59cdad469d 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/b77423ff9f0c/disk-f837f0a3.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/fe98d65e37e8/vmlinux-f837f0a3.xz kernel image: https://storage.googleapis.com/syzbot-assets/0ce03308abc6/bzImage-f837f0a3.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+94d51f4b3c59cdad469d@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 31 at arch/x86/include/asm/pgtable.h:314 try_to_migrate_one+0x19c5/0x2860 mm/rmap.c:2096 Modules linked in: CPU: 0 PID: 31 Comm: kcompactd0 Not tainted 6.5.0-rc3-syzkaller-00225-gf837f0a3c948 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 RIP: 0010:pte_uffd_wp arch/x86/include/asm/pgtable.h:314 [inline] RIP: 0010:try_to_migrate_one+0x19c5/0x2860 mm/rmap.c:2096 Code: 00 e8 6f 79 fe ff 84 c0 0f 84 1b 05 00 00 e8 d2 1b b6 ff e9 dc ee ff ff e8 c8 1b b6 ff 48 ff cb e9 a2 f3 ff ff e8 bb 1b b6 ff <0f> 0b e9 fa fa ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 59 ff RSP: 0018:ffffc90000a7ede0 EFLAGS: 00010293 RAX: ffffffff81d5fa55 RBX: 0000000000000402 RCX: ffff8880136e3b80 RDX: 0000000000000000 RSI: 0000000000000402 RDI: 0000000000000402 RBP: ffffc90000a7f130 R08: ffffffff81d5f544 R09: 1ffffd4000179978 R10: dffffc0000000000 R11: fffff94000179979 R12: 0000000000000002 R13: ffffe7fffa19a000 R14: 000000002f32fc67 R15: d000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f764abf5000 CR3: 0000000081a0e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rmap_walk_anon+0x388/0x6b0 mm/rmap.c:2441 try_to_migrate+0x3de/0x4a0 migrate_folio_unmap mm/migrate.c:1233 [inline] migrate_pages_batch+0x11c5/0x3840 mm/migrate.c:1658 migrate_pages_sync mm/migrate.c:1823 [inline] migrate_pages+0x1e7c/0x3210 mm/migrate.c:1927 compact_zone+0x308f/0x4750 mm/compaction.c:2484 proactive_compact_node mm/compaction.c:2749 [inline] kcompactd+0x1082/0x1b90 mm/compaction.c:3069 kthread+0x2b8/0x350 kernel/kthread.c:389 ret_from_fork+0x2e/0x60 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296 RIP: 0000:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 --- 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 bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup