Hello, syzbot found the following issue on: HEAD commit: 3022e9d00ebe Merge tag 'sched_ext-for-6.12-rc7-fixes' of g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15a441a7980000 kernel config: https://syzkaller.appspot.com/x/.config?x=29fedde79f609854 dashboard link: https://syzkaller.appspot.com/bug?extid=d7f40a3262f9ec8994ed 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/12ca7a216979/disk-3022e9d0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/3afa2bcfd596/vmlinux-3022e9d0.xz kernel image: https://storage.googleapis.com/syzbot-assets/a91dd258e5ba/bzImage-3022e9d0.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d7f40a3262f9ec8994ed@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KCSAN: data-race in mprotect_fixup / page_vma_mapped_walk write to 0xffff888114e57160 of 8 bytes by task 3992 on cpu 0: vm_flags_init include/linux/mm.h:862 [inline] vm_flags_reset include/linux/mm.h:874 [inline] mprotect_fixup+0x419/0x5e0 mm/mprotect.c:677 do_mprotect_pkey+0x653/0x960 mm/mprotect.c:838 __do_sys_mprotect mm/mprotect.c:859 [inline] __se_sys_mprotect mm/mprotect.c:856 [inline] __x64_sys_mprotect+0x48/0x60 mm/mprotect.c:856 x64_sys_call+0x26cf/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:11 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff888114e57160 of 8 bytes by task 3979 on cpu 1: is_vm_hugetlb_page include/linux/hugetlb_inline.h:11 [inline] page_vma_mapped_walk+0xa3/0x9f0 mm/page_vma_mapped.c:188 remove_migration_pte+0x6f9/0x9c0 mm/migrate.c:253 rmap_walk_anon+0x28f/0x440 mm/rmap.c:2635 rmap_walk+0x5b/0x70 mm/rmap.c:2713 remove_migration_ptes mm/migrate.c:373 [inline] migrate_folio_move mm/migrate.c:1388 [inline] migrate_pages_batch+0x1374/0x1910 mm/migrate.c:1898 migrate_pages_sync mm/migrate.c:1964 [inline] migrate_pages+0xff1/0x1820 mm/migrate.c:2073 do_mbind mm/mempolicy.c:1390 [inline] kernel_mbind mm/mempolicy.c:1533 [inline] __do_sys_mbind mm/mempolicy.c:1607 [inline] __se_sys_mbind+0xf76/0x1160 mm/mempolicy.c:1603 __x64_sys_mbind+0x78/0x90 mm/mempolicy.c:1603 x64_sys_call+0x2b4d/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:238 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x0000000000100077 -> 0x0000000000100070 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 3979 Comm: syz.3.175 Not tainted 6.12.0-rc7-syzkaller-00012-g3022e9d00ebe #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ================================================================== --- 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 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
