Safety check to prevent crash on macOS when IOHIDManagerCopyDevices() returns NULL #359
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
…IOHIDManagerCopyDevices() returned NULL. Calling CFSetGetCount() on a NULL CFSetRef causes a crash. The fix consists of checking if the CFSetRef is not NULL before using it. Here is a backtrace of a crash: 0x00007fffd04a5118 CFSetGetCount + 24 0x000000010c15147f hid_enumerate (hid.c:427) 0x000000010c151acc hid_open (hid.c:529)
This was referenced Jul 10, 2018
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
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Outdated suggestions cannot be applied.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.
I have seen several crashes on macOS 10.12.6 caused by the fact that IOHIDManagerCopyDevices() returned NULL. Calling CFSetGetCount() on a NULL CFSetRef causes a crash. The fix consists of checking if the CFSetRef is not NULL before using it. Here is a backtrace of a crash:
0x00007fffd04a5118 CFSetGetCount + 24
0x000000010c15147f hid_enumerate (hid.c:427)
0x000000010c151acc hid_open (hid.c:529)