Description: RDMA/uverbs: Check for null return of kmalloc_array
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=2153067
Notes:
 bwh> Introduced in 5.0 by commit 6884c6c4bd09 "RDMA/verbs: Store the
 bwh> write/write_ex uapi entry points in the uverbs_api".
Bugs:
upstream: released (5.16) [7694a7de22c53a312ea98960fcafc6ec62046531]
5.10-upstream-stable: released (5.10.91) [16e5cad6eca1e506c38c39dc256298643fa1852a]
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (5.15.15-1)
5.10-bullseye-security: released (5.10.92-1)
4.19-buster-security: N/A "Vulnerable code not present"