On Mon, 2024-01-29 at 09:49 +0000, David Howells wrote: > 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; > } > >
Reviewed-by: Jeff Layton <[email protected]>
