EXT4-fs error (device loop5): ext4_quota_enable:6321: inode #3: comm syz-executor.5: casefold flag without casefold feature
EXT4-fs warning (device loop5): ext4_enable_quotas:6363: Failed to enable quota tracking (type=0, err=-22). Please run e2fsck to fix.
EXT4-fs (loop5): mount failed
==================================================================
BUG: KCSAN: data-race in __lru_add_drain_all / __pagevec_lru_add

write to 0xffff888237d277c8 of 1 bytes by task 26434 on cpu 1:
 pagevec_reinit include/linux/pagevec.h:56 [inline]
 __pagevec_lru_add+0x243/0x270 mm/swap.c:1076
 folio_add_lru+0x11a/0x160 mm/swap.c:469
 lru_cache_add+0x37/0x50 mm/folio-compat.c:108
 lru_cache_add_inactive_or_unevictable+0x46/0x140 mm/swap.c:500
 wp_page_copy+0x781/0x10e0 mm/memory.c:3047
 do_wp_page+0x4fb/0xa80
 handle_pte_fault mm/memory.c:4569 [inline]
 __handle_mm_fault mm/memory.c:4686 [inline]
 handle_mm_fault+0x975/0x1590 mm/memory.c:4784
 do_user_addr_fault+0x609/0xbe0 arch/x86/mm/fault.c:1397
 handle_page_fault arch/x86/mm/fault.c:1485 [inline]
 exc_page_fault+0x91/0x290 arch/x86/mm/fault.c:1541
 asm_exc_page_fault+0x1e/0x30

read to 0xffff888237d277c8 of 1 bytes by task 26412 on cpu 0:
 pagevec_count include/linux/pagevec.h:61 [inline]
 __lru_add_drain_all+0x12c/0x3e0 mm/swap.c:835
 lru_add_drain_all+0xc/0x10 mm/swap.c:857
 invalidate_bdev+0x56/0x80 block/bdev.c:88
 invalidate_disk+0x25/0xb0 block/genhd.c:651
 __loop_clr_fd+0x41f/0x6c0 drivers/block/loop.c:1147
 loop_clr_fd drivers/block/loop.c:1237 [inline]
 lo_ioctl+0x985/0x1270 drivers/block/loop.c:1562
 blkdev_ioctl+0x20e/0x440 block/ioctl.c:609
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:860
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0f -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 26412 Comm: syz-executor.5 Not tainted 5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
loop5: detected capacity change from 0 to 2048
EXT4-fs error (device loop5): ext4_quota_enable:6321: inode #3: comm syz-executor.5: casefold flag without casefold feature
EXT4-fs warning (device loop5): ext4_enable_quotas:6363: Failed to enable quota tracking (type=0, err=-22). Please run e2fsck to fix.
EXT4-fs (loop5): mount failed