memfd_create03 from ubuntu_ltp_syscalls fails on Bionic (48-core Azure)

[Krzysztof Kozlowski]

Only on Azure Standard_D48_v3 instance (other seems to pass), bionic linux-azure-4.15 4.15.0-1122.135 and linux-azure-fips 4.15.0-2034.38:

04:06:34 DEBUG| [stdout] memfd_create03.c:179: TINFO: --TESTING WRITE CALL IN HUGEPAGES--
04:06:34 DEBUG| [stdout] memfd_create03.c:184: TINFO: memfd_create() succeeded
04:06:34 DEBUG| [stdout] memfd_create03.c:80: TPASS: write(8, "LTP", 3) failed as expected
04:06:34 DEBUG| [stdout]
04:06:34 DEBUG| [stdout] memfd_create03.c:179: TINFO: --TESTING PAGE SIZE OF CREATED FILE--
04:06:34 DEBUG| [stdout] memfd_create03.c:184: TINFO: memfd_create() succeeded
04:06:34 DEBUG| [stdout] memfd_create03.c:53: TINFO: mmap((nil), 2097152, 2, 2, 8, 0) succeeded
04:06:34 DEBUG| [stdout] memfd_create03.c:102: TINFO: munmap(0x7fa2ad400000, 512kB) failed as expected
04:06:34 DEBUG| [stdout] memfd_create03.c:102: TINFO: munmap(0x7fa2ad400000, 1024kB) failed as expected
04:06:34 DEBUG| [stdout] memfd_create03.c:102: TINFO: munmap(0x7fa2ad400000, 1536kB) failed as expected
04:06:34 DEBUG| [stdout] memfd_create03.c:120: TPASS: munmap() fails for page sizes less than 2048kB
04:06:34 DEBUG| [stdout]
04:06:34 DEBUG| [stdout] memfd_create03.c:179: TINFO: --TESTING HUGEPAGE ALLOCATION LIMIT--
04:06:34 DEBUG| [stdout] memfd_create03.c:184: TINFO: memfd_create() succeeded
04:06:34 DEBUG| [stdout] memfd_create03.c:47: TBROK: mmap((nil),16777216,2,2,8,0) failed: ENOMEM (12)

Error was also present in previous SRU cycle.