mgmt: updatehub: Fix possible deref an uninitialized ptr #27865
Merged
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Outdated suggestions cannot be applied.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.
There are several references to objects[1] at updatehub_probe function. The structures are decoded from json, and have a maximum length of 2. However, if the returned json only has a single element in this array, this objects[1] value will be uninitialized. Because the structure contains pointers, these will be uninitialized, causing the code to reference uninitialized memory as pointers.
Add zeroing memory before passing it to the JSON API and do check if objects_len field is two.
Fixes #27718.
Signed-off-by: Gerson Fernando Budke gerson.budke@ossystems.com.br