Re: [syzbot] [bcachefs?] possible deadlock in bch2_symlink

Al Viro <[email protected]>
Newsgroups org.kernel.vger.linux-bcachefs,org.kernel.vger.linux-kernel,org.kernel.vger.linux-unionfs
Message-ID <20250804032312.GX222315@ZenIV> 
On Mon, Aug 04, 2025 at 11:02:54AM +0800, Alan Huang wrote:
> +cc overlayfs

Sigh...

1) ovl_copy_up_workdir() should lock wdir with I_MUTEX_PARENT, same
as filename_create().

2) what the hell is bch2_symlink() need to lock the new inode for?
page_symlink() doesn't need that; are there any bcachefs-specific reasons
to bother with that?
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