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

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 0000:02:00.1 enp2s0f1: renamed from eth0

...

[ 156.311376] BUG: kernel NULL pointer dereference, address: 00000000000006c2

[ 156.318330] #PF: supervisor write access in kernel mode

[ 156.323546] #PF: error_code(0x0002) - not-present page

[ 156.328679] PGD 0 P4D 0

[ 156.331210] Oops: 0002 [#1] PREEMPT SMP NOPTI

[ 156.335567] CPU: 26 PID: 15119 Comm: reboot Tainted: G E 6.2.0+ #1

[ 156.343126] Hardware name: Abacus electric, s.r.o. - [email protected] Super Server/H12SSW-iN, BIOS 2.4 04/13/2022

[ 156.353369] RIP: 0010:i40e_shutdown+0x15/0x130 [i40e]

[ 156.358430] Code: c1 fc ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 55 48 89 fd 53 48 8b 9f 48 01 00 00 <f0> 80 8b c2 06 00 00 04 f0 80 8b c0 06 00 00 08 48 8d bb 08 08 00

[ 156.377168] RSP: 0018:ffffb223c8447d90 EFLAGS: 00010282

[ 156.382384] RAX: ffffffffc073ee70 RBX: 0000000000000000 RCX: 0000000000000001

[ 156.389510] RDX: 0000000080000001 RSI: 0000000000000246 RDI: ffff95db49988000

[ 156.396634] RBP: ffff95db49988000 R08: ffffffffffffffff R09: ffffffff8bd17d40

[ 156.403759] R10: 0000000000000001 R11: ffffffff8a5e3d28 R12: ffff95db49988000

[ 156.410882] R13: ffffffff89a6fe17 R14: ffff95db49988150 R15: 0000000000000000

[ 156.418007] FS: 00007fe7c0cc3980(0000) GS:ffff95ea8ee80000(0000) knlGS:0000000000000000

[ 156.426083] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 156.431819] CR2: 00000000000006c2 CR3: 00000003092fc005 CR4: 0000000000770ee0

[ 156.438944] PKRU: 55555554

[ 156.441647] Call Trace:

[ 156.444096] <TASK>

[ 156.446199] pci_device_shutdown+0x38/0x60

[ 156.450297] device_shutdown+0x163/0x210

[ 156.454215] kernel_restart+0x12/0x70

[ 156.457872] __do_sys_reboot+0x1ab/0x230

[ 156.461789] ? vfs_writev+0xa6/0x1a0

[ 156.465362] ? __pfx_file_free_rcu+0x10/0x10

[ 156.469635] ? __call_rcu_common.constprop.85+0x109/0x5a0

[ 156.475034] do_syscall_64+0x3e/0x90

[ 156.478611] entry_SYSCALL_64_after_hwframe+0x72/0xdc

[ 156.483658] RIP: 0033:0x7fe7bff37ab7