diff options
| author | Marc Dionne <marc.dionne@auristor.com> | 2024-01-29 12:49:18 +0300 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2024-01-29 16:53:18 +0300 |
| commit | 2147caaac7349698f2a392c5e2911a6861a09650 (patch) | |
| tree | d59908af50e08f17527b33bac0f60c4850df439f /fs/netfs | |
| parent | 41bccc98fb7931d63d03f326a746ac4d429c1dd3 (diff) | |
| download | linux-2147caaac7349698f2a392c5e2911a6861a09650.tar.xz | |
netfs: Fix i_dio_count leak on DIO read past i_size
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 <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20240129094924.1221977-2-dhowells@redhat.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: Jeff Layton <jlayton@kernel.org>
cc: <linux-afs@lists.infradead.org>
cc: <netfs@lists.linux.dev>
cc: <linux-fsdevel@vger.kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs/netfs')
| -rw-r--r-- | fs/netfs/io.c | 2 |
1 files changed, 2 insertions, 0 deletions
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; } |