Andreas Kling c44b4d61f3 Kernel: Make Inode::lookup() return a RefPtr<Inode> ...

Previously this API would return an InodeIdentifier, which meant that
there was a race in path resolution where an inode could be unlinked
in between finding the InodeIdentifier for a path component, and
actually resolving that to an Inode object.

Attaching a test that would quickly trip an assertion before.

Test: Kernel/path-resolution-race.cpp

2020-02-01 10:56:17 +01:00

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