Commit 7175fe90 authored Oct 31, 2012 by Yanchuan Nian Committed by Trond Myklebust Oct 31, 2012

nfs: Check whether a layout pointer is NULL before free it

The new layout pointer in pnfs_find_alloc_layout() may be NULL because of
out of memory. we must do some check work, otherwise pnfs_free_layout_hdr()
will go wrong because it can not deal with a NULL pointer.

Signed-off-by: Yanchuan Nian <ycnian@gmail.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

parent 8d96b106

fs/nfs/pnfs.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -925,7 +925,7 @@ pnfs_find_alloc_layout(struct inode *ino,
		if (likely(nfsi->layout == NULL)) { /* Won the race? */
		nfsi->layout = new;
		return new;
		}
		} else if (new != NULL)
		pnfs_free_layout_hdr(new);
		out_existing:
		pnfs_get_layout_hdr(nfsi->layout);