Fix for CVE-2022-24599 · Pull Request !20 · src-openEuler/audiofile

# CVE-2022-24599 Description
CVE-2022-24599 is a critical vulnerability that affects the sfcommands module, specifically the printinfo.c file. An attacker could exploit this vulnerability to execute arbitrary code, access sensitive data, or disrupt services. This poses a significant security risk, especially in environments where audio files from untrusted sources are processed, potentially leading to system compromise or sensitive information leakage.

# Changes Introduced
1.Inclusion of <limits.h> Header: Added the inclusion of the <limits.h> header file. This addition allows the use of constants like INT_MAX, which is essential for validating integer boundaries and preventing potential integer overflow issues.

```
+#include <limits.h>
```

2.Memory Allocation Improvements for miscids:Enhanced the memory allocation process for the miscids array to ensure robustness and prevent memory-related vulnerabilities.
- Zero Count Check: Introduced a check to return NULL immediately if misccount is zero, avoiding unnecessary memory allocation.
- Use of calloc: Replaced malloc with calloc to allocate memory for miscids. calloc initializes the allocated memory to zero, which can help prevent undefined behavior due to uninitialized memory.
- Allocation Failure Handling: Added checks to ensure that memory allocation was successful. If calloc returns NULL, the function returns NULL to gracefully handle allocation failures.

```
+       if(!misccount)
+               return NULL;
+       miscids = (int *) calloc(misccount, sizeof(int));
+       if(!miscids)
+               return NULL;
```

3.Enhanced Data Size Validation and Allocation: Strengthened the validation and allocation process for the data buffer to mitigate buffer overflow risks.
- Variable Type Change: Changed the type of datasize from int to size_t to accurately represent the size of memory blocks and handle larger sizes without overflow.
- Size Validation: Added a check to ensure that datasize does not exceed INT_MAX - 1. This prevents potential integer overflows when performing memory allocations based on datasize.
- Use of calloc for Data Allocation: Replaced malloc with calloc when allocating memory for data, ensuring that the allocated memory is zero-initialized. Additionally, allocated datasize + 1 bytes to accommodate the terminating NULL byte, preventing buffer overflows.
- Error Handling: Introduced an error label to handle cleanup and return NULL in case of validation failures or allocation issues.

```
+               size_t datasize = afGetMiscSize(file, miscids[i]);
+               if(datasize >= INT_MAX -1 ) {
+                       goto error;
+               }
+               char *data = (char *) calloc(datasize + 1, 1);
...
+error:
+               free(miscids);
```

Merging this PR promptly is crucial to protect users from potential exploitation of CVE-2022-24599. It ensures that audiofile remains secure and reliable for all stakeholders.

Your feedback and additional validation would be highly appreciated to expedite the merging of this security fix.

- [CVE-2022-24599 Details](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-24599)

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