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BUG: KCSAN: data-race in __ext4_update_other_inode_time / inode_io_list_del

write to 0xffff88813ad38b08 of 8 bytes by task 1787 on cpu 0:
 inode_io_list_del_locked fs/fs-writeback.c:148 [inline]
 inode_io_list_del+0x10c/0x2f0 fs/fs-writeback.c:1127
 evict+0xac/0x3c0 fs/inode.c:564
 iput_final fs/inode.c:1653 [inline]
 iput+0x433/0x590 fs/inode.c:1679
 dentry_unlink_inode+0x23a/0x260 fs/dcache.c:376
 d_delete+0x78/0xe0 fs/dcache.c:2505
 vfs_rmdir+0x2a6/0x2c0 fs/namei.c:3909
 do_rmdir+0x14a/0x2e0 fs/namei.c:3958
 __do_sys_rmdir fs/namei.c:3976 [inline]
 __se_sys_rmdir fs/namei.c:3974 [inline]
 __x64_sys_rmdir+0x2c/0x30 fs/namei.c:3974
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88813ad38b08 of 8 bytes by task 19753 on cpu 1:
 inode_is_dirtytime_only include/linux/fs.h:2425 [inline]
 __ext4_update_other_inode_time+0x48/0x5c0 fs/ext4/inode.c:4963
 ext4_update_other_inodes_time fs/ext4/inode.c:5006 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5135 [inline]
 ext4_mark_iloc_dirty+0x12e6/0x1750 fs/ext4/inode.c:5724
 __ext4_mark_inode_dirty+0x4db/0x5b0 fs/ext4/inode.c:5918
 add_dirent_to_buf+0x365/0x480 fs/ext4/namei.c:2133
 ext4_add_entry+0x3d5/0x1f90 fs/ext4/namei.c:2354
 ext4_add_nondir+0x50/0x1a0 fs/ext4/namei.c:2699
 ext4_symlink+0x4b1/0x700 fs/ext4/namei.c:3533
 vfs_symlink+0x23a/0x300 fs/namei.c:4172
 do_symlinkat+0xeb/0x280 fs/namei.c:4202
 __do_sys_symlink fs/namei.c:4223 [inline]
 __se_sys_symlink fs/namei.c:4221 [inline]
 __x64_sys_symlink+0x32/0x40 fs/namei.c:4221
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 19753 Comm: syz-executor.2 Not tainted 5.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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