Bug in Redlib malloc

[lpcware]

Content originally posted in LPCWare by udoeb on Wed Nov 05 10:38:26 MST 2014
Hi,

I'm using LPC1857 and LPCXpresso 7.4.0 and found a bug in malloc(). Steps to reproduce:

  void* p = malloc(200);
  free(p);
  p = malloc(200);

The second call to malloc crashes internally with a memory fault exception because the function dereferences a NULL pointer.This exception shows up only if the MPU is enabled and configured so that zero is a protected address. I'm using this MPU setup to detect mistakes in my own code.

If the MPU is not enabled then malloc does not crash. However, it uses a random value read from address zero then.

I would like to continue using the MPU to detect NULL pointer issues in my own code.

Questions:
1) Is the source code of Redlib available?
2) How can I get a fix for this problem?

Thanks.
Udo Eberhardt

[lpcware]

Content originally posted in LPCWare by udoeb on Tue Nov 11 07:37:50 MST 2014
Dear LPCXpresso Support,

I confirm that in v7.5.0 this issue is fixed. Thank you very much!

Regards,
Udo

[lpcware]

Content originally posted in LPCWare by lpcxpresso-support on Thu Nov 06 06:26:19 MST 2014

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Quote: lpcxpresso-support
Thanks for reporting this issue. This problem is fixed in the next release of LPCXpresso (which will be released very shortly).

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LPCXpresso 7.5.0 is now available and should fix this issue.

Regards,
LPCXpresso Support

[lpcware]

Content originally posted in LPCWare by lpcxpresso-support on Wed Nov 05 10:46:14 MST 2014
Thanks for reporting this issue. This problem is fixed in the next release of LPCXpresso (which will be released very shortly).