Hello, syzbot found the following issue on: HEAD commit: 7d730f1bf6f3 Add linux-next specific files for 20231005 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=14dc4ee5680000 kernel config: https://syzkaller.appspot.com/x/.config?x=f532286be4fff4b5 dashboard link: https://syzkaller.appspot.com/bug?extid=038716e59282db4b4608 compiler: gcc (Debian 12.2.0-14) 12.2.0, 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/1d7f28a4398f/disk-7d730f1b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d454d124268e/vmlinux-7d730f1b.xz kernel image: https://storage.googleapis.com/syzbot-assets/dbca966175cb/bzImage-7d730f1b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+038716e59282db4b4608@xxxxxxxxxxxxxxxxxxxxxxxxx __kernel_write fs/read_write.c:537 [inline] kernel_write fs/read_write.c:558 [inline] kernel_write+0x1f8/0x6c0 fs/read_write.c:548 process_sysctl_arg+0x22c/0x5f0 fs/proc/proc_sysctl.c:1668 parse_one kernel/params.c:154 [inline] parse_args+0x587/0x8b0 kernel/params.c:189 do_sysctl_args+0xc8/0x150 fs/proc/proc_sysctl.c:1700 kernel_init+0x75/0x2a0 init/main.c:1460 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 page_owner free stack trace missing ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5210 at mm/memcontrol.c:7552 mem_cgroup_migrate+0x2fa/0x390 mm/memcontrol.c:7552 Modules linked in: CPU: 0 PID: 5210 Comm: syz-executor.0 Not tainted 6.6.0-rc4-next-20231005-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:mem_cgroup_migrate+0x2fa/0x390 mm/memcontrol.c:7552 Code: f7 ff e9 36 ff ff ff 80 3d 84 b2 d1 0c 00 0f 85 54 ff ff ff 48 c7 c6 a0 9e 9b 8a 48 89 ef e8 0d 5c df ff c6 05 68 b2 d1 0c 01 <0f> 0b e9 37 ff ff ff 48 c7 c6 e0 9a 9b 8a 48 89 df e8 f0 5b df ff RSP: 0018:ffffc9000497fa18 EFLAGS: 00010246 RAX: 0000000000040000 RBX: ffffea0005338000 RCX: ffffc90004f11000 RDX: 0000000000040000 RSI: ffffffff81e76463 RDI: ffffffff8ae96da0 RBP: ffffea00004a8000 R08: 0000000000000000 R09: fffffbfff1d9db9a R10: ffffffff8ecedcd7 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000200 R14: 0000000000000000 R15: ffffea00004a8018 FS: 00007f2fd9cb96c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8bc6f77978 CR3: 00000000206cc000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> hugetlbfs_migrate_folio fs/hugetlbfs/inode.c:1066 [inline] hugetlbfs_migrate_folio+0xd0/0x120 fs/hugetlbfs/inode.c:1049 move_to_new_folio+0x183/0x690 mm/migrate.c:966 unmap_and_move_huge_page mm/migrate.c:1428 [inline] migrate_hugetlbs mm/migrate.c:1546 [inline] migrate_pages+0x16ac/0x27c0 mm/migrate.c:1900 do_move_pages_to_node mm/migrate.c:2039 [inline] move_pages_and_store_status+0xf4/0x230 mm/migrate.c:2129 do_pages_move mm/migrate.c:2244 [inline] kernel_move_pages+0xc47/0x18e0 mm/migrate.c:2424 __do_sys_move_pages mm/migrate.c:2438 [inline] __se_sys_move_pages mm/migrate.c:2433 [inline] __x64_sys_move_pages+0xe0/0x1b0 mm/migrate.c:2433 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f2fd8e7cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2fd9cb90c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000117 RAX: ffffffffffffffda RBX: 00007f2fd8f9bf80 RCX: 00007f2fd8e7cae9 RDX: 0000000020000040 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 00007f2fd8ec847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f2fd8f9bf80 R15: 00007fffc11f8338 </TASK> --- 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@xxxxxxxxxxxxxxxx. 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 overwrite 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
