Re: [syzbot] [hfs?] WARNING in hfs_write_inode

On Fri, 21 Jul 2023, Matthew Wilcox wrote:

> 
> You've misunderstood.  Google have decided to subject the entire kernel 
> (including obsolete unmaintained filesystems) to stress tests that it's 
> never had before.  IOW these bugs have been there since the code was 
> merged.  There's nothing to back out.  There's no API change to blame. 
> It's always been buggy and it's never mattered before.
> 

I'm not blaming the unstable API for the bugs, I'm blaming it for the 
workload. A stable API (like a userspace API) decreases the likelihood 
that overloaded maintainers have to orphan a filesystem implementation.