Affected: Linux

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

i40e: Fix kernel crash during reboot when adapter is in recovery mode

If the driver detects during probe that firmware is in recovery mode then i40e_init_recovery_mode() is called and the rest of probe function is skipped including pci_set_drvdata(). Subsequent i40e_shutdown() called during shutdown/reboot dereferences NULL pointer as pci_get_drvdata() returns NULL.

To fix call pci_set_drvdata() also during entering to recovery mode.

Reproducer: 1) Lets have i40e NIC with firmware in recovery mode 2) Run reboot

Result: [ 139.084698] i40e: Intel(R) Ethernet Connection XL710 Network Driver [ 139.090959] i40e: Copyright (c) 2013 - 2019 Intel Corporation. [ 139.108438] i40e 0000:02:00.0: Firmware recovery mode detected. Limiting functionality. [ 139.116439] i40e 0000:02:00.0: Refer to the Intel(R) Ethernet Adapters and Devices User Guide for details on firmware recovery mode. [ 139.129499] i40e 0000:02:00.0: fw 8.3.64775 api 1.13 nvm 8.30 0x8000b78d 1.3106.0 [8086:1583] [15d9:084a] [ 139.215932] i40e 0000:02:00.0 enp2s0f0: renamed from eth0 [ 139.223292] i40e 0000:02:00.1: Firmware recovery mode detected. Limiting functionality. [ 139.231292] i40e 0000:02:00.1: Refer to the Intel(R) Ethernet Adapters and Devices User Guide for details on firmware recovery mode. [ 139.244406] i40e 0000:02:00.1: fw 8.3.64775 api 1.13 nvm 8.30 0x8000b78d 1.3106.0 [8086:1583] [15d9:084a] [ 139.329209] i40e 0000:02:00.…