| commit | 2658e683a7dc63f2a11c1d77467423545a48eb5a | [log] [tgz] |
|---|---|---|
| author | Adrian Danis <adanis@google.com> | Wed Jun 26 00:57:45 2019 +0000 |
| committer | CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> | Wed Jun 26 00:57:45 2019 +0000 |
| tree | e6ac411bb3fe602d92b2e56d9c528b57637b1968 | |
| parent | 42b546ad16bd225db50d259f429897d456ccb606 [diff] |
[kernel][vm] More rigorous VDSO unmap range check This modifies the range check in Unmap to account for the range partially overlapping with the vdso mapping. Presently there is no way to actually trigger this since * `allow_partial_vmar` must be true for the previous check to not be sufficient. * `allow_partial_vmar` is only true when called from `UnmapAllowPartial`, which is only called from from the hypervisor code against a guest physical address space, and such an address space does not have a vdso. No tests are added for this change since * Userspace cannot trigger this as there is no way for it to cause `UnmapAllowPartial` to get called on an address space with a vdso. * Kernel cannot presently clone the VDso VMO itself to create a fake address space for testing. ZX-4394 #done Change-Id: I38128b9ebd3046b6c98f33c88f7608cf7e348219
Pink + Purple == Fuchsia (a new operating system)
Fuchsia is a modular, capability-based operating system. Fuchsia runs on modern 64-bit Intel and ARM processors.
Fuchsia is an open source project with a code of conduct that we expect everyone who interacts with the project to respect.
See Getting Started.
See the documentation.