CVE-2026-68328

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

nfp: Check resource mutex allocation

nfp_cpp_resource_find() allocates a CPP mutex handle for the matching

resource-table entry and then reports success. nfp_resource_try_acquire()

immediately passes that handle to nfp_cpp_mutex_trylock().

However, nfp_cpp_mutex_alloc() returns NULL on failure. If that happens

for a matching table entry, the resource lookup still returns success and

the following trylock dereferences a NULL mutex pointer while opening the

resource.

nfp_resource_acquire() already treats failure to allocate the table mutex

as -ENOMEM. Do the same for the resource mutex and fail the lookup before

publishing the rest of the resource handle.

This issue was found by a static analysis checker and confirmed by

manual source review.