CVE-2022-49725

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

i40e: Fix call trace in setup_tx_descriptors

After PF reset and ethtool -t there was call trace in dmesg sometimes leading to panic. When there was some time, around 5 seconds, between reset and test there were no errors.

Problem was that pf reset calls i40e_vsi_close in prep_for_reset and ethtool -t calls i40e_vsi_close in diag_test. If there was not enough time between those commands the second i40e_vsi_close starts before previous i40e_vsi_close was done which leads to crash.

Add check to diag_test if pf is in reset and don't start offline tests if it is true. Add netif_info("testing failed") into unhappy path of i40e_diag_test()

This vulnerability is rated as Moderate severity because triggering the race condition requires local access on systems equipped with Intel 40 Gigabit Ethernet adapters, resulting exclusively in a local denial of service through a kernel panic without impacting data integrity or confidentiality. Under standard Red Hat Enterprise Linux deployments, the issue only manifests if an administrative self-test diagnostic is initiated while the physical function is concurrently undergoing a reset. Because unprivileged users cannot initiate these diagnostic procedures and hardware resets, the overall threat to production environments remains limited.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.