CVE-2025-22104

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

ibmvnic: Use kernel helpers for hex dumps

Previously, when the driver was printing hex dumps, the buffer was cast

to an 8 byte long and printed using string formatters. If the buffer

size was not a multiple of 8 then a read buffer overflow was possible.

Therefore, create a new ibmvnic function that loops over a buffer and

calls hex_dump_to_buffer instead.

This patch address KASAN reports like the one below:

ibmvnic 30000003 env3: Login Buffer:

ibmvnic 30000003 env3: 01000000af000000

<...>

ibmvnic 30000003 env3: 2e6d62692e736261

ibmvnic 30000003 env3: 65050003006d6f63

==================================================================

BUG: KASAN: slab-out-of-bounds in ibmvnic_login+0xacc/0xffc [ibmvnic]

Read of size 8 at addr c0000001331a9aa8 by task ip/17681

<...>

Allocated by task 17681:

<...>

ibmvnic_login+0x2f0/0xffc [ibmvnic]

ibmvnic_open+0x148/0x308 [ibmvnic]

__dev_open+0x1ac/0x304

<...>

The buggy address is located 168 bytes inside of

allocated 175-byte region [c0000001331a9a00, c0000001331a9aaf)

<...>

=================================================================

ibmvnic 30000003 env3: 000000000033766e