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BUG: KCSAN: data-race in __ext4_update_other_inode_time / iput

write to 0xffff88800ba44678 of 8 bytes by task 3002 on cpu 1:
 __ext4_update_other_inode_time+0xc1/0x550 fs/ext4/inode.c:4966
 ext4_update_other_inodes_time fs/ext4/inode.c:5002 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5131 [inline]
 ext4_mark_iloc_dirty+0x1286/0x1650 fs/ext4/inode.c:5712
 __ext4_mark_inode_dirty+0x450/0x610 fs/ext4/inode.c:5906
 add_dirent_to_buf+0x465/0x5e0 fs/ext4/namei.c:2040
 ext4_add_entry+0x60e/0x2160 fs/ext4/namei.c:2248
 ext4_mkdir+0x362/0x6e0 fs/ext4/namei.c:2814
 vfs_mkdir+0x288/0x350 fs/namei.c:3650
 do_mkdirat+0x132/0x220 fs/namei.c:3673
 __do_sys_mkdir fs/namei.c:3689 [inline]
 __se_sys_mkdir fs/namei.c:3687 [inline]
 __x64_sys_mkdir+0x32/0x40 fs/namei.c:3687
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88800ba44678 of 8 bytes by task 15729 on cpu 0:
 iput+0x2e/0x510 fs/inode.c:1670
 do_unlinkat+0x2c9/0x4d0 fs/namei.c:3903
 __do_sys_unlink fs/namei.c:3943 [inline]
 __se_sys_unlink fs/namei.c:3941 [inline]
 __x64_sys_unlink+0x2c/0x30 fs/namei.c:3941
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 15729 Comm: syz-executor.0 Not tainted 5.10.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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