server: Fix backend range check
commit1f2073d8617ad7dd8ec1519589081284fcbc47b5
authorEric Blake <eblake@redhat.com>
Thu, 3 Oct 2019 21:29:39 +0000 (3 16:29 -0500)
committerEric Blake <eblake@redhat.com>
Fri, 4 Oct 2019 15:13:49 +0000 (4 10:13 -0500)
treef2c8f5fe72c7402a731ed0c4ad538db974f27d71
parentd3520bbfba16a71462e8763e28503f6429cdd12e
server: Fix backend range check

h->exportsize is unsigned, so the assertion as written was a no-op.
It was intended to catch cases where exportsize was left at -1 from
prior to .open (which, until recently, could happen in both the xz and
retry filters).

Fixes: dbdec62725
Signed-off-by: Eric Blake <eblake@redhat.com>
server/backend.c