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BUG: KCSAN: data-race in __mark_inode_dirty / other_inode_match

write to 0xffff888128d593c0 of 8 bytes by task 31759 on cpu 1:
 __mark_inode_dirty+0x1ce/0x940 fs/fs-writeback.c:2289
 generic_update_time+0x184/0x270 fs/inode.c:1681
 update_time+0x85/0x90 fs/inode.c:1694
 file_update_time+0x205/0x2d0 fs/inode.c:1909
 ext4_page_mkwrite+0xee/0x850 fs/ext4/inode.c:5920
 do_page_mkwrite+0x100/0x210 mm/memory.c:2364
 do_shared_fault mm/memory.c:3738 [inline]
 do_fault mm/memory.c:3806 [inline]
 handle_pte_fault mm/memory.c:4033 [inline]
 __handle_mm_fault+0x1e45/0x2e00 mm/memory.c:4163
 handle_mm_fault+0x21b/0x530 mm/memory.c:4200
 do_user_addr_fault arch/x86/mm/fault.c:1442 [inline]
 do_page_fault+0x496/0xa3d arch/x86/mm/fault.c:1517
 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1203

read to 0xffff888128d593c0 of 8 bytes by task 30710 on cpu 0:
 other_inode_match+0x6b/0x5c0 fs/ext4/inode.c:4849
 find_inode_nowait+0x135/0x160 fs/inode.c:1445
 ext4_update_other_inodes_time fs/ext4/inode.c:4897 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5023 [inline]
 ext4_mark_iloc_dirty+0x12a8/0x1580 fs/ext4/inode.c:5578
 ext4_mark_inode_dirty+0xe9/0x420 fs/ext4/inode.c:5771
 __ext4_new_inode+0x1c93/0x2f30 fs/ext4/ialloc.c:1176
 ext4_mkdir+0x270/0x820 fs/ext4/namei.c:2782
 vfs_mkdir+0x283/0x390 fs/namei.c:3889
 do_mkdirat+0x1ac/0x1f0 fs/namei.c:3912
 __do_sys_mkdir fs/namei.c:3928 [inline]
 __se_sys_mkdir fs/namei.c:3926 [inline]
 __x64_sys_mkdir+0x40/0x50 fs/namei.c:3926
 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: 30710 Comm: syz-executor.3 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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