EXT4-fs error (device loop4): __ext4_fill_super:5473: inode #2: comm syz-executor.4: casefold flag without casefold feature
EXT4-fs (loop4): get root inode failed
EXT4-fs (loop4): mount failed
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BUG: KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru

write to 0xffff888237c2a448 of 8 bytes by task 29250 on cpu 0:
 __invalidate_bh_lrus fs/buffer.c:1487 [inline]
 invalidate_bh_lru+0x88/0xf0 fs/buffer.c:1499
 csd_do_func kernel/smp.c:133 [inline]
 smp_call_function_many_cond+0x697/0xc20 kernel/smp.c:835
 on_each_cpu_cond_mask+0x3c/0x80 kernel/smp.c:1012
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x2a/0x30 fs/buffer.c:1518
 kill_bdev block/bdev.c:75 [inline]
 blkdev_flush_mapping+0xb6/0x1c0 block/bdev.c:630
 blkdev_put_whole block/bdev.c:661 [inline]
 blkdev_put+0x33a/0x470 block/bdev.c:898
 blkdev_release+0x50/0x60 block/fops.c:604
 __fput+0x2fd/0x5f0 fs/file_table.c:384
 __fput_sync+0x44/0x50 fs/file_table.c:465
 __do_sys_close fs/open.c:1572 [inline]
 __se_sys_close+0xfa/0x1a0 fs/open.c:1557
 __x64_sys_close+0x1f/0x30 fs/open.c:1557
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888237c2a448 of 8 bytes by task 29252 on cpu 1:
 has_bh_in_lru+0x35/0x1e0 fs/buffer.c:1509
 smp_call_function_many_cond+0x2e4/0xc20 kernel/smp.c:797
 on_each_cpu_cond_mask+0x3c/0x80 kernel/smp.c:1012
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x2a/0x30 fs/buffer.c:1518
 invalidate_bdev+0x4f/0x70 block/bdev.c:85
 __ext4_fill_super fs/ext4/super.c:5678 [inline]
 ext4_fill_super+0x16ef/0x3940 fs/ext4/super.c:5703
 get_tree_bdev+0x272/0x300 fs/super.c:1577
 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5735
 vfs_get_tree+0x51/0x1b0 fs/super.c:1750
 do_new_mount+0x203/0x660 fs/namespace.c:3335
 path_mount+0x496/0xb30 fs/namespace.c:3662
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount+0x27f/0x2d0 fs/namespace.c:3861
 __x64_sys_mount+0x67/0x80 fs/namespace.c:3861
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0xffff888100748138 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 29252 Comm: syz-executor.4 Tainted: G        W          6.6.0-rc2-syzkaller-00027-g5d2f53532ecc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
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