[PATCH 0/2] fuse: fix regression in fuse_get_user_pages()

From: Maxim Patlasov
Date: Wed Sep 03 2014 - 06:10:36 EST


The patchset fixes a regression introduced by the following commits:

c7f3888ad7f0 ("switch iov_iter_get_pages() to passing maximal number of pages")
c9c37e2e6378 ("fuse: switch to iov_iter_get_pages()")

The regression manifests itslef like this (thanks to Werner Baumann for reporting):

> davfs2 uses the fuse kernel module directly (not using the fuse
> userspace library). A user of davfs2 reported this problem
> (http://savannah.nongnu.org/support/?108640):
> dd if=/dev/zero of=/mnt/owncloud/test.txt bs=20416 count=1
> works fine, but
> dd if=/dev/zero of=/mnt/owncloud/test.txt bs=20417 count=1
> fails.



Maxim Patlasov (2):
vfs: switch iov_iter_get_pages() to passing maximal size
fuse: fuse_get_user_pages(): do not pack more data than requested

fs/direct-io.c | 2 +-
fs/fuse/file.c | 13 +++++++++----
include/linux/uio.h | 2 +-
mm/iov_iter.c | 17 +++++++++--------
4 files changed, 20 insertions(+), 14 deletions(-)

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/