==================================================================
BUG: KCSAN: data-race in __mark_inode_dirty / other_inode_match

write to 0xffff8881258b46f0 of 8 bytes by task 7346 on cpu 1:
 __mark_inode_dirty+0x1ce/0x940 fs/fs-writeback.c:2286
 generic_update_time+0x184/0x270 fs/inode.c:1667
 update_time fs/inode.c:1683 [inline]
 touch_atime+0x172/0x190 fs/inode.c:1754
 file_accessed include/linux/fs.h:2202 [inline]
 iterate_dir+0x232/0x380 fs/readdir.c:70
 __do_sys_getdents fs/readdir.c:285 [inline]
 __se_sys_getdents fs/readdir.c:266 [inline]
 __x64_sys_getdents+0x14b/0x280 fs/readdir.c:266
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff8881258b46f0 of 8 bytes by task 23473 on cpu 0:
 other_inode_match+0x6b/0x5c0 fs/ext4/inode.c:5156
 find_inode_nowait+0x135/0x160 fs/inode.c:1437
 ext4_update_other_inodes_time fs/ext4/inode.c:5204 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5330 [inline]
 ext4_mark_iloc_dirty+0x12a8/0x1580 fs/ext4/inode.c:5876
 ext4_mark_inode_dirty+0xe9/0x420 fs/ext4/inode.c:6055
 __ext4_ext_dirty+0x101/0x120 fs/ext4/extents.c:165
 ext4_ext_insert_extent+0x9cd/0x25c0 fs/ext4/extents.c:2161
 ext4_ext_map_blocks+0xc5c/0x2330 fs/ext4/extents.c:4486
 ext4_map_blocks+0x23a/0xfa0 fs/ext4/inode.c:640
 ext4_getblk+0x82/0x380 fs/ext4/inode.c:974
 ext4_bread+0x4a/0x210 fs/ext4/inode.c:1024
 ext4_append+0xc8/0x1f0 fs/ext4/namei.c:67
 ext4_init_new_dir fs/ext4/namei.c:2728 [inline]
 ext4_mkdir+0x421/0x820 fs/ext4/namei.c:2773
 vfs_mkdir+0x283/0x390 fs/namei.c:3807

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 23473 Comm: syz-executor.2 Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================