CVE-2021-47519 Information

Description

In the Linux kernel the following vulnerability has been resolved:

can: m_can: m_can_read_fifo: fix memory leak in error branch

In m_can_read_fifo() if the second call to m_can_fifo_read() fails the function jump to the out_fail label and returns without calling m_can_receive_skb(). This means that the skb previously allocated by alloc_can_skb() is not freed. In other terms this is a memory leak.

This patch adds a goto label to destroy the skb if an error occurs.

Issue was found with GCC -fanalyzer please follow the link below for details.

Reference

https://git.kernel.org/stable/c/75a422165477dd12d2d20aa7c9ee7c9a281c9908 https://git.kernel.org/stable/c/31cb32a590d62b18f69a9a6d433f4e69c74fdd56