From: Marc Dionne <[email protected]> If netfs_begin_read gets a NETFS_DIO_READ request that begins past i_size, it won't perform any i/o and just return 0. This will leak an increment to i_dio_count that is done at the top of the function.
This can cause subsequent buffered read requests to block indefinitely, waiting for a non existing dio operation to complete. Add a inode_dio_end() for the NETFS_DIO_READ case, before returning. Signed-off-by: Marc Dionne <[email protected]> Signed-off-by: David Howells <[email protected]> cc: Jeff Layton <[email protected]> cc: [email protected] cc: [email protected] cc: [email protected] --- fs/netfs/io.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/netfs/io.c b/fs/netfs/io.c index e8ff1e61ce79..4261ad6c55b6 100644 --- a/fs/netfs/io.c +++ b/fs/netfs/io.c @@ -748,6 +748,8 @@ int netfs_begin_read(struct netfs_io_request *rreq, bool sync) if (!rreq->submitted) { netfs_put_request(rreq, false, netfs_rreq_trace_put_no_submit); + if (rreq->origin == NETFS_DIO_READ) + inode_dio_end(rreq->inode); ret = 0; goto out; }
