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BUG: KCSAN: data-race in ext4_mark_iloc_dirty / find_inode_bit.isra.0

read to 0xffff888118d54014 of 4 bytes by task 14181 on cpu 1:
 recently_deleted fs/ext4/ialloc.c:698 [inline]
 find_inode_bit.isra.0+0x1d8/0x300 fs/ext4/ialloc.c:722
 __ext4_new_inode+0xd4b/0x3070 fs/ext4/ialloc.c:914
 ext4_mkdir+0x289/0x820 fs/ext4/namei.c:2763
 vfs_mkdir+0x283/0x390 fs/namei.c:3807
 do_mkdirat+0x1ac/0x1f0 fs/namei.c:3830
 __do_sys_mkdir fs/namei.c:3846 [inline]
 __se_sys_mkdir fs/namei.c:3844 [inline]
 __x64_sys_mkdir+0x40/0x50 fs/namei.c:3844
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff888118d54014 of 4 bytes by task 29837 on cpu 0:
 ext4_do_update_inode fs/ext4/inode.c:5274 [inline]
 ext4_mark_iloc_dirty+0x74a/0x1580 fs/ext4/inode.c:5876
 ext4_mark_inode_dirty+0xe9/0x420 fs/ext4/inode.c:6055
 __ext4_new_inode+0x1d00/0x3070 fs/ext4/ialloc.c:1178
 ext4_symlink+0x30e/0x970 fs/ext4/namei.c:3262
 vfs_symlink fs/namei.c:4119 [inline]
 vfs_symlink+0x218/0x310 fs/namei.c:4105
 do_symlinkat+0x1a5/0x1e0 fs/namei.c:4146
 __do_sys_symlink fs/namei.c:4165 [inline]
 __se_sys_symlink fs/namei.c:4163 [inline]
 __x64_sys_symlink+0x3f/0x50 fs/namei.c:4163
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 29837 Comm: syz-executor.0 Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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