nfsd4: reject "negative" acl lengths
authorJ. Bruce Fields <bfields@redhat.com>
Tue, 26 Mar 2013 18:11:13 +0000 (14:11 -0400)
committerJ. Bruce Fields <bfields@redhat.com>
Tue, 26 Mar 2013 20:18:27 +0000 (16:18 -0400)
commit64a817cfbded8674f345d1117b117f942a351a69
tree0095ce868b0da2305045cedfdd8ead602aa12f72
parente49dbbf3e770aa590a8a464ac4978a09027060b9
nfsd4: reject "negative" acl lengths

Since we only enforce an upper bound, not a lower bound, a "negative"
length can get through here.

The symptom seen was a warning when we attempt to a kmalloc with an
excessive size.

Reported-by: Toralf Förster <toralf.foerster@gmx.de>
Cc: stable@kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
fs/nfsd/nfs4xdr.c