nfs_write_end(): fix handling of short copies
authorAl Viro <viro@zeniv.linux.org.uk>
Tue, 6 Sep 2016 01:42:32 +0000 (21:42 -0400)
committerBen Hutchings <ben@decadent.org.uk>
Thu, 16 Mar 2017 02:18:30 +0000 (02:18 +0000)
commitbdfb0cb3f4f17c80ce2179448f5868609ea5b34e
tree56937a59bf6c9839ccde87845853bf6e5d4ff77b
parentccdf4bdd4777130a022e89592827a5f4a6253547
nfs_write_end(): fix handling of short copies

commit c0cf3ef5e0f47e385920450b245d22bead93e7ad upstream.

What matters when deciding if we should make a page uptodate is
not how much we _wanted_ to copy, but how much we actually have
copied.  As it is, on architectures that do not zero tail on
short copy we can leave uninitialized data in page marked uptodate.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
fs/nfs/file.c