CVE-2021-47158

In the Linux kernel, the following vulnerability has been resolved:

net: dsa: sja1105: add error handling in sja1105_setup()

If any of sja1105_static_config_load(), sja1105_clocking_setup() or sja1105_devlink_setup() fails, we cant just return in the middle of sja1105_setup() or memory will leak. Add a cleanup path.

Weakness

The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.

Affected Software

Potential Mitigations

• Choose a language or tool that provides automatic memory management, or makes manual memory management less error-prone.
• For example, glibc in Linux provides protection against free of invalid pointers.
• When using Xcode to target OS X or iOS, enable automatic reference counting (ARC) [REF-391].
• To help correctly and consistently manage memory when programming in C++, consider using a smart pointer class such as std::auto_ptr (defined by ISO/IEC ISO/IEC 14882:2003), std::shared_ptr and std::unique_ptr (specified by an upcoming revision of the C++ standard, informally referred to as C++ 1x), or equivalent solutions such as Boost.

References

• https://git.kernel.org/stable/c/987e4ab8b8a4fcbf783069e03e7524cd39ffd563
• https://git.kernel.org/stable/c/cec279a898a3b004411682f212215ccaea1cd0fb
• https://git.kernel.org/stable/c/dd8609f203448ca6d58ae71461208b3f6b0329b0
• https://git.kernel.org/stable/c/987e4ab8b8a4fcbf783069e03e7524cd39ffd563
• https://git.kernel.org/stable/c/cec279a898a3b004411682f212215ccaea1cd0fb
• https://git.kernel.org/stable/c/dd8609f203448ca6d58ae71461208b3f6b0329b0