ensure that partial reads from recv don't trip up rendering #469
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
![github-advanced-security[bot]](https://avatars.githubusercontent.com/in/57789?s=60&v=4){kind=small}
| if (s > 0) { | ||
| bzero(&resp, sizeof(struct protocol)); | ||
| ret = recv(fd, &resp, sizeof(struct protocol_v2), 0); | ||
| ret = recv(fd, &resp + already_read, want - already_read, 0); |
Check notice
Code scanning / Flawfinder
Function accepts input from outside program (CWE-20).
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
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Outdated suggestions cannot be applied.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.
It is not guaranteed that recv will always return the number of bytes you have asked for; it can return fewer bytes which should not be treated as an error. This is a rare issue but I have actually encountered it on a (virtualised) system. Review requested though - unsure if I have the logic watertight.