stack smashing detected with 'nvme sanitize-log /dev/nvme0'

[Daniel Wagner]

FYI, I got a a bug report [1] with a 'stack smashing detected' when running
'nvme sanitize-log /dev/nvme0' on Debian. Originally, it was reported against
udisk. udisk recently added libnvme which does now a sanitize-log call, so this
problem might exists for a while.

We figured out that an older kernel such as 4.19.289 work but newer not (it's a
bit hard for the reporter to test all combinations on his setup due to compiler
changes etc.).

There was a bit of refactoring in v5.2 which could be the cause of the stack
smash, because saw this recent fix:

 b8f6446b6853 ("nvme-pci: fix DMA direction of unmapping integrity data")

[1] https://github.com/storaged-project/udisks/issues/1152