EXT4-fs (loop4): couldn't mount as ext2 due to feature incompatibilities ================================================================== BUG: KCSAN: data-race in __lru_add_drain_all / folio_add_lru_vma read-write to 0xffff888237d29c88 of 1 bytes by task 18184 on cpu 1: folio_batch_add include/linux/pagevec.h:74 [inline] folio_batch_add_and_move mm/swap.c:231 [inline] folio_add_lru mm/swap.c:517 [inline] folio_add_lru_vma+0x6c/0x160 mm/swap.c:537 wp_page_copy mm/memory.c:3206 [inline] do_wp_page+0x1551/0x1f20 mm/memory.c:3525 handle_pte_fault mm/memory.c:5160 [inline] __handle_mm_fault mm/memory.c:5285 [inline] handle_mm_fault+0xb80/0x27c0 mm/memory.c:5450 do_user_addr_fault arch/x86/mm/fault.c:1364 [inline] handle_page_fault arch/x86/mm/fault.c:1507 [inline] exc_page_fault+0x401/0x6d0 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 read to 0xffff888237d29c88 of 1 bytes by task 18179 on cpu 0: folio_batch_count include/linux/pagevec.h:53 [inline] cpu_needs_drain mm/swap.c:795 [inline] __lru_add_drain_all+0x137/0x420 mm/swap.c:889 lru_add_drain_all+0x10/0x20 mm/swap.c:905 invalidate_bdev+0x54/0x70 block/bdev.c:89 __ext4_fill_super fs/ext4/super.c:5678 [inline] ext4_fill_super+0x1789/0x39b0 fs/ext4/super.c:5703 get_tree_bdev+0x250/0x2e0 fs/super.c:1619 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5735 vfs_get_tree+0x53/0x1d0 fs/super.c:1784 do_new_mount+0x227/0x690 fs/namespace.c:3352 path_mount+0x496/0xb30 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x27f/0x2d0 fs/namespace.c:3875 __x64_sys_mount+0x67/0x80 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b value changed: 0x0d -> 0x00 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 18179 Comm: syz-executor.4 Not tainted 6.8.0-rc4-syzkaller-00034-g8d3dea210042 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 ==================================================================