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BUG: KCSAN: data-race in __ext4_update_other_inode_time / iput

write to 0xffff88800ebd6298 of 8 bytes by task 8490 on cpu 0:
 __ext4_update_other_inode_time+0xc1/0x550 fs/ext4/inode.c:4963
 ext4_update_other_inodes_time fs/ext4/inode.c:4999 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5128 [inline]
 ext4_mark_iloc_dirty+0x1286/0x1650 fs/ext4/inode.c:5709
 __ext4_mark_inode_dirty+0x450/0x610 fs/ext4/inode.c:5903
 __ext4_unlink+0x60b/0x7d0 fs/ext4/namei.c:3257
 ext4_unlink+0xc8/0x2a0 fs/ext4/namei.c:3285
 vfs_unlink+0x232/0x3b0 fs/namei.c:3832
 do_unlinkat+0x28a/0x4d0 fs/namei.c:3896
 __do_sys_unlink fs/namei.c:3942 [inline]
 __se_sys_unlink fs/namei.c:3940 [inline]
 __x64_sys_unlink+0x2c/0x30 fs/namei.c:3940
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88800ebd6298 of 8 bytes by task 8482 on cpu 1:
 iput+0x2e/0x510 fs/inode.c:1670
 do_unlinkat+0x2c9/0x4d0 fs/namei.c:3902
 __do_sys_unlink fs/namei.c:3942 [inline]
 __se_sys_unlink fs/namei.c:3940 [inline]
 __x64_sys_unlink+0x2c/0x30 fs/namei.c:3940
 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: 1 PID: 8482 Comm: syz-executor.0 Not tainted 5.9.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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