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Bug 653

Summary: SDL SVN 1.3 2008-12-09, win32 platform, invalid memory free in SDL_win32mouse.c
Product: SDL Reporter: Andrew <arahome>
Component: eventsAssignee: Ryan C. Gordon <icculus>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: critical    
Priority: P2    
Version: HG 2.0   
Hardware: x86   
OS: Windows (All)   

Description Andrew 2008-12-10 01:22:25 UTC 
File SDL_win32mouse.c caused invalid memory de-allocation at line 129:
  SDL_free(buffer);

This is caused incorrect manipulation of pointer variable "buffer" at line 96:
  buffer += 4;
which is allocated at line 87:
  buffer = SDL_malloc((tmp + 1) * sizeof(char));

This bug is fixed by fast woraround adding at line 128 new line with:
        buffer -= 4;
just before if operator

Recommended to compelely review this section of code.

Also line 88 looks quite incorrect:
  key_name = SDL_malloc(tmp + sizeof(reg_key_root) * sizeof(char));
- tmp not multiplied by sizeof(char)
- size of char pointer counted instead of strlen
- not counted zero string end
Comment 1 Sam Lantinga 2009-02-16 21:29:26 UTC 
It looks like this code was reviewed and fixed in revision 4334.

Thanks!