Description: romfs: fix uninitialized memory leak in romfs_dev_read()
References:
 https://bugs.chromium.org/p/project-zero/issues/detail?id=2077
Notes:
Bugs:
upstream: released (5.9-rc2) [bcf85fcedfdd17911982a3e3564fcfec7b01eebd]
4.19-upstream-stable: released (4.19.142) [9660983738399465fd0e3b1977a61bbd29b2e5be]
4.9-upstream-stable: released (4.9.234) [6d26d08216475e5a40e4f6ade397c181a19dc524]
sid: released (5.8.7-1)
4.19-buster-security: released (4.19.146-1)
4.9-stretch-security: released (4.9.240-1)