CVE-2022-49191 Information

Description

In the Linux kernel the following vulnerability has been resolved:

mxser: fix xmit_buf leak in activate when LSR == 0xff

When LSR is 0xff in ->activate() (rather unlike) we return an error. Provided ->shutdown() is not called when ->activate() fails nothing actually frees the buffer in this case.

Fix this by properly freeing the buffer in a designated label. We jump there also from the !info->type\ if now too.

Reference

https://git.kernel.org/stable/c/125b7c929fc9b1e5eaa344bceb6367dfa6fd3f9d https://git.kernel.org/stable/c/2cd05c38a27bee7fb42aa4d43174d68ac55dac0f https://git.kernel.org/stable/c/376922045009f8ea2d20a8fa3475e95b47c41690 https://git.kernel.org/stable/c/685b6d16bf89595310b5d61394c9b97cc9505c7c https://git.kernel.org/stable/c/6c9041b2f90c0eace73106f22350e1d2c98f5edc https://git.kernel.org/stable/c/6dffc2035fbaada60ca8db59e0962e34f760370a https://git.kernel.org/stable/c/996291d06851a26678a0fab488b6e1f0677c0576 https://git.kernel.org/stable/c/b125b08dbee3611f03f53b71471813ed4ccafcdd https://git.kernel.org/stable/c/cd3a4907ee334b40d7aa880c7ab310b154fd5cd4