JavaScript is not currently enabled, but is required for full CodeSonar manual search and browse functionality.
If you are viewing this file in your hub's Web GUI, enable JavaScript in your browser: you will also need it for GUI functionality.
If you opened this file directly from disk, your browser may be directly suppressing JavaScript functionality: certain browsers perform this suppression on local files (but not files delivered by web servers) for security reasons.
| CodeSonar® 9.2p0 | CONFIDENTIAL | CodeSecure Inc |
A function that should not operate on overlapping memory regions is instructed to do so.
| Class Name | Overlapping Memory Regions | |||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Significance | security | |||||||||||||||||||||||||||
| Mnemonic | MISC.MEM.OR | |||||||||||||||||||||||||||
| Categories |
|
|||||||||||||||||||||||||||
| Availability | Available for C and C++. |
|||||||||||||||||||||||||||
| Enabling | Checks for this warning class are enabled by
default. To disable them, add the following WARNING_FILTER rule to the
project configuration file.
WARNING_FILTER += discard class="Overlapping Memory Regions" |
Japanese (ja)
#include <string.h>
void f(char *p)
{
memcpy(p, p, 10); // Warning issued here
}
CodeSonar ships with library models that allow it to recognize a large number of functions that take multiple memory region arguments that should not overlap. Some examples are shown in the table below. If one of these functions is called with overlapping memory region arguments, a warning will be issued.
If you have created a custom library model for some function f() in terms of one of these existing models, calls to f() will also be capable of triggering Overlapping Memory Regions warnings.
| Functions that can trigger warnings include... | |
|---|---|
| Apache Portable Runtime (APR) | apr_cpystrn() |
| gcc Builtins | __builtin___memcpy_chk(), __builtin___strcat_chk() |
| libc | memcpy(), strcat() |
| Linux Kernel | copy_from_user() |
| Mac OS X | copyin()copyin() |
| ODBC | SQLNativeSqlA(), SQLNativeSqlUNIX(), SQLNativeSqlW() |
| OpenSSL | RYPTO_strdup() |
| Qt | qMemCopy() |
| Win32 | StrCatA(), StrCatW(), wcsncpy() |
The following configuration file parameters affect checks for this warning class.
To report problems with this documentation, please visit https://support.codesecure.com/.