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BUG: KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty

write to 0xffff888106e16ab8 of 8 bytes by task 1789 on cpu 1:
 __mark_inode_dirty+0x1ef/0x6c0 fs/fs-writeback.c:2312
 mark_inode_dirty include/linux/fs.h:2404 [inline]
 dquot_alloc_space include/linux/quotaops.h:317 [inline]
 dquot_alloc_block include/linux/quotaops.h:334 [inline]
 ext4_mb_new_blocks+0x116b/0x1f90 fs/ext4/mballoc.c:5476
 ext4_ext_map_blocks+0x1569/0x1f00 fs/ext4/extents.c:4241
 ext4_map_blocks+0x70d/0xef0 fs/ext4/inode.c:638
 ext4_getblk+0xb1/0x3d0 fs/ext4/inode.c:848
 ext4_bread+0x28/0x130 fs/ext4/inode.c:900
 ext4_append+0xd1/0x1c0 fs/ext4/namei.c:67
 ext4_init_new_dir+0x177/0x500 fs/ext4/namei.c:2885
 ext4_mkdir+0x329/0x760 fs/ext4/namei.c:2931
 vfs_mkdir+0x2a4/0x370 fs/namei.c:3813
 do_mkdirat+0x11d/0x200 fs/namei.c:3838
 __do_sys_mkdir fs/namei.c:3856 [inline]
 __se_sys_mkdir fs/namei.c:3854 [inline]
 __x64_sys_mkdir+0x32/0x40 fs/namei.c:3854
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888106e16ab8 of 8 bytes by task 25909 on cpu 0:
 inode_is_dirtytime_only include/linux/fs.h:2423 [inline]
 __ext4_update_other_inode_time+0x48/0x5c0 fs/ext4/inode.c:4963
 ext4_update_other_inodes_time fs/ext4/inode.c:5006 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5135 [inline]
 ext4_mark_iloc_dirty+0x12b6/0x1750 fs/ext4/inode.c:5724
 __ext4_mark_inode_dirty+0x4db/0x5b0 fs/ext4/inode.c:5918
 __ext4_ext_dirty fs/ext4/extents.c:169 [inline]
 ext4_ext_insert_extent+0x1385/0x2bc0 fs/ext4/extents.c:2130
 ext4_split_extent_at+0x6e3/0xb50 fs/ext4/extents.c:3208
 ext4_force_split_extent_at fs/ext4/extents.c:305 [inline]
 ext4_swap_extents+0xc7f/0x13a0 fs/ext4/extents.c:5660
 move_extent_per_page fs/ext4/move_extent.c:339 [inline]
 ext4_move_extents+0x1fec/0x2250 fs/ext4/move_extent.c:673
 __ext4_ioctl fs/ext4/ioctl.c:938 [inline]
 ext4_ioctl+0x12f4/0x1df0 fs/ext4/ioctl.c:1224
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:1069 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:1055
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:1055
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000000000008008 -> 0x000000000000800f

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 25909 Comm: syz-executor.1 Not tainted 5.13.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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