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BUG: KCSAN: data-race in __ext4_update_other_inode_time / inode_io_list_del

write to 0xffff888010f04778 of 8 bytes by task 8417 on cpu 1:
 inode_io_list_del_locked fs/fs-writeback.c:148 [inline]
 inode_io_list_del+0x9c/0x240 fs/fs-writeback.c:1127
 evict+0xad/0x410 fs/inode.c:565
 iput_final fs/inode.c:1654 [inline]
 iput+0x3fd/0x520 fs/inode.c:1680
 do_unlinkat+0x2e9/0x4f0 fs/namei.c:4103
 __do_sys_unlink fs/namei.c:4143 [inline]
 __se_sys_unlink fs/namei.c:4141 [inline]
 __x64_sys_unlink+0x2c/0x30 fs/namei.c:4141
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888010f04778 of 8 bytes by task 18055 on cpu 0:
 inode_is_dirtytime_only include/linux/fs.h:2286 [inline]
 __ext4_update_other_inode_time+0x45/0x550 fs/ext4/inode.c:4965
 ext4_update_other_inodes_time fs/ext4/inode.c:5008 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5137 [inline]
 ext4_mark_iloc_dirty+0x11b6/0x16f0 fs/ext4/inode.c:5724
 __ext4_mark_inode_dirty+0x4db/0x5e0 fs/ext4/inode.c:5918
 ext4_add_nondir+0xa1/0x1a0 fs/ext4/namei.c:2587
 ext4_create+0x227/0x310 fs/ext4/namei.c:2630
 lookup_open fs/namei.c:3219 [inline]
 open_last_lookups fs/namei.c:3289 [inline]
 path_openat+0xd36/0x21b0 fs/namei.c:3495
 do_filp_open+0xbd/0x1d0 fs/namei.c:3525
 do_sys_openat2+0xa3/0x250 fs/open.c:1187
 do_sys_open fs/open.c:1203 [inline]
 __do_sys_openat fs/open.c:1219 [inline]
 __se_sys_openat fs/open.c:1214 [inline]
 __x64_sys_openat+0xef/0x110 fs/open.c:1214
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 18055 Comm: syz-executor.0 Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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