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linux/fs/fuse/file.c
Miklos Szeredi f578da7993 fuse: fix fuse_write_end() if zero bytes were copied 
commit 59c3b76cc6 upstream.

If pos is at the beginning of a page and copied is zero then page is not
zeroed but is marked uptodate.

Fix by skipping everything except unlock/put of page if zero bytes were
copied.

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Fixes: 6b12c1b37e ("fuse: Implement write_begin/write_end callbacks")
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
2017-02-23 03:54:33 +00:00

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