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BUG: KCSAN: data-race in d_instantiate_new / other_inode_match

write to 0xffff888128dac340 of 8 bytes by task 15240 on cpu 1:
 d_instantiate_new+0xb5/0x100 fs/dcache.c:1977
 ext4_add_nondir+0x140/0x190 fs/ext4/namei.c:2574
 ext4_symlink+0x629/0x9b0 fs/ext4/namei.c:3356
 vfs_symlink fs/namei.c:4201 [inline]
 vfs_symlink+0x218/0x310 fs/namei.c:4187
 do_symlinkat+0x1a5/0x1e0 fs/namei.c:4228
 __do_sys_symlink fs/namei.c:4247 [inline]
 __se_sys_symlink fs/namei.c:4245 [inline]
 __x64_sys_symlink+0x3f/0x50 fs/namei.c:4245
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff888128dac340 of 8 bytes by task 15239 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_symlink+0x31c/0x9b0 fs/ext4/namei.c:3287
 vfs_symlink fs/namei.c:4201 [inline]
 vfs_symlink+0x218/0x310 fs/namei.c:4187
 do_symlinkat+0x1a5/0x1e0 fs/namei.c:4228
 __do_sys_symlink fs/namei.c:4247 [inline]
 __se_sys_symlink fs/namei.c:4245 [inline]
 __x64_sys_symlink+0x3f/0x50 fs/namei.c:4245
 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: 15239 Comm: syz-executor.0 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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