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AJvYcCXTbWsd3l1Gz1eeMYgDEpci9LaFn8Azx41/fMk7aNXgm1scugJtUxQAEjvcxeTlT136pOddZOEJCHZBEyA=@vger.kernel.org X-Gm-Message-State: AOJu0YxGd0uy7gYVJpaUubJMLVvRjnB/HekGkGrCoqFEYnScmcrYfqbG 1l1q/WaqcLEYMucFjES07wLyxfFR+VW759kzfbUt+oAzgKyGNiEFWXkSygjUZ3UbEGCgwydQDrb fPLAaPP4TEtrw6mnimrOJq6np+HTgjRjmaeSpTF08KOPgWc9Xg10NQZNZnyY= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:e8c6:0:b0:67b:db2e:a91e with SMTP id 006d021491bc7-67bdb2eaa89mr6221556eaf.17.1773601766913; Sun, 15 Mar 2026 12:09:26 -0700 (PDT) Date: Sun, 15 Mar 2026 12:09:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69b703e6.050a0220.248e02.0101.GAE@google.com> Subject: [syzbot] [mm?] WARNING in folio_add_new_anon_rmap From: syzbot To: Liam.Howlett@oracle.com, akpm@linux-foundation.org, david@kernel.org, harry.yoo@oracle.com, jannh@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, ljs@kernel.org, riel@surriel.com, syzkaller-bugs@googlegroups.com, vbabka@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: f90aadf1c67c Add linux-next specific files for 20260311 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=12309806580000 kernel config: https://syzkaller.appspot.com/x/.config?x=2b10825359140979 dashboard link: https://syzkaller.appspot.com/bug?extid=e24a2e34fad0efbac047 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10cb575a580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14db4d52580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/aca9c54a7de2/disk-f90aadf1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/736fd5e68863/vmlinux-f90aadf1.xz kernel image: https://storage.googleapis.com/syzbot-assets/eb13b7d81d1b/bzImage-f90aadf1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e24a2e34fad0efbac047@syzkaller.appspotmail.com ------------[ cut here ]------------ address < vma->vm_start || address + (nr << 12) > vma->vm_end WARNING: mm/rmap.c:1682 at folio_add_new_anon_rmap+0x5fe/0x14b0 mm/rmap.c:1681, CPU#1: syz.2.19/6118 Modules linked in: CPU: 1 UID: 0 PID: 6118 Comm: syz.2.19 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/27/2026 RIP: 0010:folio_add_new_anon_rmap+0x5fe/0x14b0 mm/rmap.c:1681 Code: 89 f5 4d 8b 36 4c 89 e7 4c 89 f6 e8 ec aa a9 ff 4d 39 f4 73 1a e8 82 a8 a9 ff 4c 8b 74 24 10 49 bc 00 00 00 00 00 fc ff df 90 <0f> 0b 90 eb 5a 44 89 f8 c1 e0 0c 48 98 49 01 c4 49 83 c5 08 4c 89 RSP: 0018:ffffc900036675a0 EFLAGS: 00010293 RAX: ffffffff821d041e RBX: ffffea0001c0c1c0 RCX: ffff888060bf5b80 RDX: 0000000000000000 RSI: 00002000004ca000 RDI: 00002000004cb000 RBP: 0000000000000000 R08: ffffea0001c0c1c7 R09: 1ffffd4000381838 R10: dffffc0000000000 R11: fffff94000381839 R12: dffffc0000000000 R13: ffff8880784ad788 R14: ffffea0001c0c1c8 R15: 0000000000000001 FS: 00007f9a968ce6c0(0000) GS:ffff88812553e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000002b8000 CR3: 000000007c646000 CR4: 00000000003526f0 Call Trace: mfill_atomic_install_pte+0x578/0x870 mm/userfaultfd.c:390 __mfill_atomic_pte+0x3c4/0x5f0 mm/userfaultfd.c:523 mfill_atomic_pte_copy mm/userfaultfd.c:557 [inline] mfill_atomic_pte mm/userfaultfd.c:865 [inline] mfill_atomic mm/userfaultfd.c:923 [inline] mfill_atomic_copy+0x4d9/0x1330 mm/userfaultfd.c:950 userfaultfd_copy fs/userfaultfd.c:1642 [inline] userfaultfd_ioctl+0x2b8a/0x4b00 fs/userfaultfd.c:2059 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9a9599c799 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9a968ce028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f9a95c15fa0 RCX: 00007f9a9599c799 RDX: 0000200000000040 RSI: 00000000c028aa03 RDI: 0000000000000003 RBP: 00007f9a95a32c99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9a95c16038 R14: 00007f9a95c15fa0 R15: 00007ffd373c5448 --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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