Re: file system permissions regression affecting root

[Christian Kujau]

On Wed, 13 May 2020, Patrick Donnelly wrote:
> However, it seems odd that this depends on the owner of the directory.
> i.e. this protection only seems to be enforced if the sticky directory
> is owned by root. That's expected?

According to the documentation[0] this appears to be intentional:

 protected_regular:
   [...]
   When set to "1" don't allow O_CREAT open on regular files that we
   don't own in world writable sticky directories, unless they are
   owned by the owner of the directory.

C.

[0] https://www.kernel.org/doc/Documentation/sysctl/fs.txt
-- 
BOFH excuse #263:

It's stuck in the Web.