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

read to 0xffff88811d4da150 of 8 bytes by task 6863 on cpu 1:
 other_inode_match fs/ext4/inode.c:4889 [inline]
 other_inode_match+0x258/0x570 fs/ext4/inode.c:4868
 find_inode_nowait+0x12f/0x160 fs/inode.c:1446
 ext4_update_other_inodes_time fs/ext4/inode.c:4923 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5049 [inline]
 ext4_mark_iloc_dirty+0x12ad/0x1580 fs/ext4/inode.c:5603
 ext4_mark_inode_dirty+0xe6/0x420 fs/ext4/inode.c:5796
 ext4_rmdir fs/ext4/namei.c:3154 [inline]
 ext4_rmdir+0x658/0x720 fs/ext4/namei.c:3087
 vfs_rmdir fs/namei.c:3688 [inline]
 vfs_rmdir+0x119/0x310 fs/namei.c:3667
 do_rmdir+0x2e9/0x320 fs/namei.c:3750
 __do_sys_rmdir fs/namei.c:3768 [inline]
 __se_sys_rmdir fs/namei.c:3766 [inline]
 __x64_sys_rmdir+0x2c/0x40 fs/namei.c:3766
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff88811d4da150 of 16 bytes by task 7528 on cpu 0:
 generic_update_time+0x109/0x270 fs/inode.c:1675
 update_time+0x7d/0x90 fs/inode.c:1695
 file_update_time+0x205/0x2d0 fs/inode.c:1910
 ext4_page_mkwrite+0xed/0x820 fs/ext4/inode.c:5945
 do_page_mkwrite+0xfa/0x210 mm/memory.c:2529
 do_shared_fault mm/memory.c:3911 [inline]
 do_fault mm/memory.c:3979 [inline]
 handle_pte_fault mm/memory.c:4215 [inline]
 __handle_mm_fault+0x2545/0x2ec0 mm/memory.c:4345
 handle_mm_fault+0x21c/0x540 mm/memory.c:4382
 do_user_addr_fault arch/x86/mm/fault.c:1464 [inline]
 do_page_fault+0x48a/0xa96 arch/x86/mm/fault.c:1535
 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1203

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7528 Comm: syz-executor.2 Not tainted 5.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================