Re: Vurnability in libbpf heap buffer attached with solution and Issue link

[Eduard Zingerman <eddyz87@gmail.com>]

On Fri, 2025-01-24 at 13:25 +0530, shivam tiwari wrote:
> Fix Heap Buffer Overflow in btf_ext_parse_info Function
> This pull request addresses a heap-buffer-overflow vulnerability detected in the btf_ext_parse_info function located in src/btf.c. The issue arises at line 3001, where an out-of-bounds memory access occurs, potentially leading to undefined behavior and memory corruption. This can happen if the function accesses data that exceeds the allocated buffer size without sufficient bounds checking.
> Fix:
>  * Added additional checks to ensure the buffer accesses remain within bounds.
>  * Improved memory validation to prevent overflows and ensure the integrity of the data being processed.
> This change mitigates the risk of a heap buffer overflow, improving the safety of the code and ensuring that all memory accesses are within valid ranges.
> 
> For further details, refer to the issue link: OSS-Fuzz Issue 388905046 https://issues.oss-fuzz.com/issues/388905046 
> attached below updated code file 
> If you have any specific resolution code or further details to include in the PR, please let me know.

Hi Shivam,

Please take a look at kernel contribution guidlines:
https://www.kernel.org/doc/html/latest/process/submitting-patches.html
Please consider sending a patch in accordance to these guidelines.