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BUG: KCSAN: data-race in clear_inode / other_inode_match

read to 0xffff8880b8ef0cc0 of 8 bytes by task 7950 on cpu 0:
 other_inode_match+0x6b/0x5c0 fs/ext4/inode.c:4820
 find_inode_nowait+0x135/0x160 fs/inode.c:1437
 ext4_update_other_inodes_time fs/ext4/inode.c:4868 [inline]
 ext4_do_update_inode fs/ext4/inode.c:4994 [inline]
 ext4_mark_iloc_dirty+0x12a8/0x1580 fs/ext4/inode.c:5547
 ext4_mark_inode_dirty+0xe9/0x420 fs/ext4/inode.c:5740
 __ext4_ext_dirty+0xfc/0x120 fs/ext4/extents.c:177
 ext4_ext_insert_extent+0x9cd/0x25c0 fs/ext4/extents.c:2167
 ext4_ext_map_blocks+0xc52/0x2320 fs/ext4/extents.c:4507
 ext4_map_blocks+0x23a/0xff0 fs/ext4/inode.c:623
 ext4_getblk+0x82/0x380 fs/ext4/inode.c:827
 ext4_bread+0x4a/0x210 fs/ext4/inode.c:877
 ext4_append+0xc8/0x1f0 fs/ext4/namei.c:67
 ext4_init_new_dir fs/ext4/namei.c:2739 [inline]
 ext4_mkdir+0x405/0x820 fs/ext4/namei.c:2784
 vfs_mkdir+0x283/0x390 fs/namei.c:3819
 do_mkdirat+0x1ac/0x1f0 fs/namei.c:3842
 __do_sys_mkdir fs/namei.c:3858 [inline]
 __se_sys_mkdir fs/namei.c:3856 [inline]
 __x64_sys_mkdir+0x40/0x50 fs/namei.c:3856
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff8880b8ef0cc0 of 8 bytes by task 7947 on cpu 1:
 clear_inode+0x151/0x1b0 fs/inode.c:536
 ext4_clear_inode+0x34/0x110 fs/ext4/super.c:1174
 ext4_free_inode+0x117/0xa50 fs/ext4/ialloc.c:274
 ext4_evict_inode+0x87f/0xe50 fs/ext4/inode.c:316
 evict+0x244/0x410 fs/inode.c:574
 iput_final fs/inode.c:1563 [inline]
 iput+0x371/0x4e0 fs/inode.c:1589
 dentry_unlink_inode+0x270/0x2e0 fs/dcache.c:374
 d_delete fs/dcache.c:2451 [inline]
 d_delete+0xdb/0xe0 fs/dcache.c:2440
 vfs_rmdir fs/namei.c:3896 [inline]
 vfs_rmdir+0x2e2/0x300 fs/namei.c:3861
 do_rmdir+0x2cb/0x300 fs/namei.c:3944
 __do_sys_rmdir fs/namei.c:3962 [inline]
 __se_sys_rmdir fs/namei.c:3960 [inline]
 __x64_sys_rmdir+0x2f/0x40 fs/namei.c:3960
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 7947 Comm: syz-executor.0 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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