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BUG: KCSAN: data-race in d_instantiate_new / other_inode_match

read to 0xffff888125067b00 of 8 bytes by task 11808 on cpu 0:
 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_dirty_inode+0xb1/0xe0 fs/ext4/inode.c:5771
 __mark_inode_dirty+0x5d4/0x940 fs/fs-writeback.c:2258
 mark_inode_dirty_sync include/linux/fs.h:2177 [inline]
 dquot_free_space include/linux/quotaops.h:385 [inline]
 dquot_free_block include/linux/quotaops.h:395 [inline]
 ext4_mb_new_blocks+0x11d2/0x1de0 fs/ext4/mballoc.c:4582
 ext4_ext_map_blocks+0x1c0f/0x2320 fs/ext4/extents.c:4481
 ext4_map_blocks+0x23a/0xff0 fs/ext4/inode.c:623
 ext4_alloc_file_blocks+0x1e6/0x6e0 fs/ext4/extents.c:4670
 ext4_fallocate+0x57a/0x1460 fs/ext4/extents.c:4955
 vfs_fallocate+0x3be/0x650 fs/open.c:309
 ioctl_preallocate+0x12b/0x190 fs/ioctl.c:491
 file_ioctl fs/ioctl.c:537 [inline]
 do_vfs_ioctl+0xb14/0xcf0 fs/ioctl.c:732
 ksys_ioctl+0xbd/0xe0 fs/ioctl.c:749
 __do_sys_ioctl fs/ioctl.c:756 [inline]
 __se_sys_ioctl fs/ioctl.c:754 [inline]
 __x64_sys_ioctl+0x4c/0x60 fs/ioctl.c:754
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff888125067b00 of 8 bytes by task 11806 on cpu 1:
 d_instantiate_new+0xb5/0x100 fs/dcache.c:1977
 ext4_add_nondir+0x140/0x190 fs/ext4/namei.c:2566
 ext4_symlink+0x629/0x9b0 fs/ext4/namei.c:3344
 vfs_symlink fs/namei.c:4131 [inline]
 vfs_symlink+0x218/0x310 fs/namei.c:4117
 do_symlinkat+0x1a5/0x1e0 fs/namei.c:4158
 __do_sys_symlink fs/namei.c:4177 [inline]
 __se_sys_symlink fs/namei.c:4175 [inline]
 __x64_sys_symlink+0x3f/0x50 fs/namei.c:4175
 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: 1 PID: 11806 Comm: syz-executor.3 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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