Description

In the Linux kernel, the following vulnerability has been resolved: net: dsa: microchip: Don't free uninitialized ksz_irq If something goes wrong at setup, ksz_irq_free() can be called on uninitialized ksz_irq (for example when ksz_ptp_irq_setup() fails). It leads to freeing uninitialized IRQ numbers and/or domains. Use dsa_switch_for_each_user_port_continue_reverse() in the error path to iterate only over the fully initialized ports.

References 3

• git.kernel.org https://git.kernel.org/stable/c/25b62cc5b22c45face094ae3e8717258e46d1d19
• git.kernel.org https://git.kernel.org/stable/c/32abbcf4379a0f851d7eb9d4389e7bf5c64bf6c0
• git.kernel.org https://git.kernel.org/stable/c/9428654c827fa8d38b898135d26d39ee2d544246

Remediation