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authorTrond Myklebust <trond.myklebust@hammerspace.com>2019-08-12 22:19:54 +0300
committerTrond Myklebust <trond.myklebust@hammerspace.com>2019-08-19 15:56:04 +0300
commitf4340e9314dbfadc48758945f85fc3b16612d06f (patch)
tree259b0c479e729a7f7a0d62be2eb04720fed4ec36 /fs
parent9821421a291b548ef4369c6998745baa36ddecd5 (diff)
downloadlinux-f4340e9314dbfadc48758945f85fc3b16612d06f.tar.xz
NFSv4/pnfs: Fix a page lock leak in nfs_pageio_resend()
If the attempt to resend the pages fails, we need to ensure that we clean up those pages that were not transmitted. Fixes: d600ad1f2bdb ("NFS41: pop some layoutget errors to application") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Cc: stable@vger.kernel.org # v4.5+
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/pagelist.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index ed4e1b07447b..15c254753f88 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -1251,20 +1251,22 @@ static void nfs_pageio_complete_mirror(struct nfs_pageio_descriptor *desc,
int nfs_pageio_resend(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr)
{
- LIST_HEAD(failed);
+ LIST_HEAD(pages);
desc->pg_io_completion = hdr->io_completion;
desc->pg_dreq = hdr->dreq;
- while (!list_empty(&hdr->pages)) {
- struct nfs_page *req = nfs_list_entry(hdr->pages.next);
+ list_splice_init(&hdr->pages, &pages);
+ while (!list_empty(&pages)) {
+ struct nfs_page *req = nfs_list_entry(pages.next);
if (!nfs_pageio_add_request(desc, req))
- nfs_list_move_request(req, &failed);
+ break;
}
nfs_pageio_complete(desc);
- if (!list_empty(&failed)) {
- list_move(&failed, &hdr->pages);
- return desc->pg_error < 0 ? desc->pg_error : -EIO;
+ if (!list_empty(&pages)) {
+ int err = desc->pg_error < 0 ? desc->pg_error : -EIO;
+ hdr->completion_ops->error_cleanup(&pages, err);
+ return err;
}
return 0;
}