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

read to 0xffff888046b1b840 of 8 bytes by task 14245 on cpu 1:
 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 0xffff888046b1b840 of 8 bytes by task 20458 on cpu 0:
 iput_final fs/inode.c:1558 [inline]
 iput+0x2f6/0x4e0 fs/inode.c:1589
 do_unlinkat+0x378/0x530 fs/namei.c:4073
 __do_sys_unlink fs/namei.c:4114 [inline]
 __se_sys_unlink fs/namei.c:4112 [inline]
 __x64_sys_unlink+0x3b/0x50 fs/namei.c:4112
 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: 0 PID: 20458 Comm: syz-executor.2 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================