[Bug 44290] New: Possible access to unintended field in "wine/dlls/winmm/ mmio.c" line 788

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=44290

            Bug ID: 44290
           Summary: Possible access to unintended field in
                    "wine/dlls/winmm/mmio.c" line 788
           Product: Wine
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winmm&mci
          Assignee: wine-bugs at winehq.org
          Reporter: petrum at gmail.com
      Distribution: ---

While experimenting with a CodeSonar plugin we develop, we noticed a
potential bug in file "wine/dlls/winmm/mmio.c"" line 788 function mmioRead

size = MMIO_GrabNextBuffer(wm, TRUE);
if (size <= 0) break;
if (size > cch) size = cch;
memcpy(pch, wm->info.pchBuffer, size);
wm->info.pchNext += size; //HERE
pch += size;
cch -= size;
count += size;

Shouldn't wm->info.pchBuffer be incremented at the mentioned line (instead of 
wm->info.pchNext)?

Thanks,
Petru Florin Mihancea

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