block: fix status value size
#6586
Merged
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
As per VirtIO spec 1.2 section 5.2.6, the `status` field is a byte, not u32. cloud-hypervisor writes an `u32` to guest memory, which accidentally zeros out the following 3 bytes, and may corrupt guest OS internal state. Signed-off-by: Changyuan Lyu <[email protected]>
liuw
approved these changes
Jul 13, 2024
rbradford
approved these changes
Jul 14, 2024
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
As per VirtIO spec 1.2 section 5.2.6, the
statusfield is a byte, not u32. cloud-hypervisor writes anu32to guest memory, which accidentally zeros out the following 3 bytes, and may corrupt guest OS internal state.