Hello, syzbot found the following issue on: HEAD commit: d009de7d5428 Merge tag 'livepatching-for-6.14-rc2' of git:.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12b678a4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9e757e3762bd630b dashboard link: https://syzkaller.appspot.com/bug?extid=c2e5712cbb14c95d4847 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/9235000a1b88/disk-d009de7d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/098ef82f8ab3/vmlinux-d009de7d.xz kernel image: https://storage.googleapis.com/syzbot-assets/4f51f5eb5782/bzImage-d009de7d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c2e5712cbb14c95d4847@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KCSAN: data-race in mprotect_fixup / try_to_migrate_one write to 0xffff888114b41700 of 8 bytes by task 6432 on cpu 1: vm_flags_init include/linux/mm.h:875 [inline] vm_flags_reset include/linux/mm.h:887 [inline] mprotect_fixup+0x419/0x5e0 mm/mprotect.c:679 do_mprotect_pkey+0x6cc/0x9a0 mm/mprotect.c:840 __do_sys_mprotect mm/mprotect.c:861 [inline] __se_sys_mprotect mm/mprotect.c:858 [inline] __x64_sys_mprotect+0x48/0x60 mm/mprotect.c:858 x64_sys_call+0x2770/0x2dc0 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 0xffff888114b41700 of 8 bytes by task 6418 on cpu 0: try_to_migrate_one+0xb5a/0x12e0 mm/rmap.c:2321 rmap_walk_anon+0x28f/0x440 mm/rmap.c:2646 try_to_migrate+0x11f/0x150 migrate_folio_unmap mm/migrate.c:1320 [inline] migrate_pages_batch+0x786/0x1930 mm/migrate.c:1866 migrate_pages_sync mm/migrate.c:1989 [inline] migrate_pages+0xf02/0x1840 mm/migrate.c:2098 do_mbind mm/mempolicy.c:1394 [inline] kernel_mbind mm/mempolicy.c:1537 [inline] __do_sys_mbind mm/mempolicy.c:1611 [inline] __se_sys_mbind+0xfd1/0x11c0 mm/mempolicy.c:1607 __x64_sys_mbind+0x78/0x90 mm/mempolicy.c:1607 x64_sys_call+0x2662/0x2dc0 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: 0x0000000000102077 -> 0x0000000000102071 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 6418 Comm: syz.0.1339 Not tainted 6.14.0-rc1-syzkaller-00026-gd009de7d5428 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 ================================================================== --- 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
