Linus Torvalds writes: (Summary) Now it's subtle in the odd pid counting instead, and how it
generates temporary kernel mounts all the time.
generates temporary kernel mounts all the time.
And the problem with the old code apparently went unnoticed for years, and only hits some very odd cases. It's simply about the changes being subtle and unclear, and the commits mixing things up and not being legible enough that anybody can just go "yeah, that's safe and obviously a fix".
safe and obviously a fix".
The odd pid counting optimization wasn't even *explained* for chrissake. At that point I may go "yeah, this fixes a real issue and doesn't introduce new ones".
doesn't introduce new ones".
As it is, it's not at all obvious that it doesn't introduce new issues.
generates temporary kernel mounts all the time.
And the problem with the old code apparently went unnoticed for years, and only hits some very odd cases. It's simply about the changes being subtle and unclear, and the commits mixing things up and not being legible enough that anybody can just go "yeah, that's safe and obviously a fix".
safe and obviously a fix".
The odd pid counting optimization wasn't even *explained* for chrissake. At that point I may go "yeah, this fixes a real issue and doesn't introduce new ones".
doesn't introduce new ones".
As it is, it's not at all obvious that it doesn't introduce new issues.