getData EXC_BAD_ACCESS

[treymcmeans]

Using the getData method, I am getting a random EXC_BAD_ACCESS on the lastQueryParameters = query line.

malloc: *** error for object 0x61800045c31e: Invalid pointer dequeued from free list

Here is the error from the console. I'm not sure if this is related to #15 or not? Thanks for your help. Let me know if you need more information.

  open func getData(_ key: String) -> Data? {
    let prefixedKey = keyWithPrefix(key)
    
    var query: [String: Any] = [
      KeychainSwiftConstants.klass       : kSecClassGenericPassword,
      KeychainSwiftConstants.attrAccount : prefixedKey,
      KeychainSwiftConstants.returnData  : kCFBooleanTrue,
      KeychainSwiftConstants.matchLimit  : kSecMatchLimitOne
    ]
    
    query = addAccessGroupWhenPresent(query)
    query = addSynchronizableIfRequired(query, addingItems: false)
    lastQueryParameters = query
    
    var result: AnyObject?
    
    lastResultCode = withUnsafeMutablePointer(to: &result) {
      SecItemCopyMatching(query as CFDictionary, UnsafeMutablePointer($0))
    }
    
    if lastResultCode == noErr { return result as? Data }
    
    return nil
  }

[evgenyneu]

Thanks for reporting. I have not seen this one before. Is it crashing consistently, can you reproduce the problem? If so, could you isolate this bug into a demo app and post here please, so I can try and debug it?

I googled the error text and found this stackoverflow discussion. They suggested changing deployment target. Not sure if that's relevant to your case.

[treymcmeans]

It’s not every time, but it does happen frequently. I’ll get a sample project together using the same type data that is stored. I’m also going to make sure it is not an iOS 11 bug

[evgenyneu]

A sample project would be great, thank you.

[juliorimo]

This is happening to me many times when I try to use getData into an Operation.

*** error for object 0x101903620: pointer being freed was not allocated

KeychainSwift.swift line 169
specialized KeychainSwift.getData(String) -> Data?

And this is what I see in the console:
malloc: *** error for object 0x604000258d1e: Invalid pointer dequeued from free list *** set a breakpoint in malloc_error_break to debug

[evgenyneu]

This was probably fixed by this pull request.

[MouGABSI]

I am having the same problem with the last version and i am using iOS 11.
It does happen frequently.

[RamblinWreck77]

This happens to me as well. Here's the relevant info from the crashed thread:

Crashed: com.apple.main-thread
0  KeychainSwift                  0x101b30a7c (String, Any) (KeychainSwift.swift)
1  KeychainSwift                  0x101b2f36c _NativeDictionaryBuffer (KeychainSwift.swift)
2  KeychainSwift                  0x101b304e4 specialized KeychainSwift.getData(String) -> Data? (KeychainSwift.swift:171)
3  KeychainSwift                  0x101b2d820 KeychainSwift.getData(String) -> Data? (KeychainSwift.swift)

Error is:

Crashed: com.apple.main-thread
EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x05ff2b7000000390

[evgenyneu]

@RamblinWreck77, @MouldiGABSI, thanks for reporting. There was a multithreading issue fixed since version 10 of the library. Make sure you are at version 10 at least.

[RamblinWreck77]

@evgenyneu My Apologies, I didn't mention the version.

This is on v11.0.0

[brow]

I'm encountering this crash with v11.0.0 on iOS 11. I noticed:

• The crash did not occur when I was building keychain-swift with Carthage (as a dynamic framework), only once I started building keychain-swift with Cocoapods (as a static framework).
• The crash occurs in a Release build, not in a Debug build, though I have not been able yet to deduce which build setting in particular is decisive.
• The same crash occurs with KeychainAccess as well as with this library

[andre991]

Any solutions?