From: "J. Bruce Fields" <bfields@xxxxxxxxxx> >From https://tools.ietf.org/html/rfc7862#page-65 A count of 0 (zero) requests that all bytes from ca_src_offset through EOF be copied to the destination. Reported-by: <radchenkoy@xxxxxxxxx> Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx> --- fs/nfsd/nfs4proc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 5419342df360..62354229f0b0 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1387,6 +1387,9 @@ static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy) u64 src_pos = copy->cp_src_pos; u64 dst_pos = copy->cp_dst_pos; + /* See RFC 7862 p.67: */ + if (bytes_total == 0) + bytes_total = ULLONG_MAX; do { if (kthread_should_stop()) break; -- 2.30.2
