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authorJeff Layton <jlayton@redhat.com>2010-10-28 18:10:37 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2010-10-28 19:17:25 +0400
commit015f0212d51d85bd281a831639a769b4a1a3307a (patch)
treee873e64419d0a5e1000de1ce8f91e28f0ec5ac41 /fs/nfs/pagelist.c
parent568a810d7edd58bd505222dd1c7e48895532290b (diff)
downloadlinux-015f0212d51d85bd281a831639a769b4a1a3307a.tar.xz
nfs: handle lock context allocation failures in nfs_create_request
nfs_get_lock_context can return NULL on an allocation failure. Regression introduced by commit f11ac8db. Reported-by: Steve Dickson <steved@redhat.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Cc: stable@kernel.org Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/pagelist.c')
-rw-r--r--fs/nfs/pagelist.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 919490232e17..137b549e63db 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -65,6 +65,13 @@ nfs_create_request(struct nfs_open_context *ctx, struct inode *inode,
if (req == NULL)
return ERR_PTR(-ENOMEM);
+ /* get lock context early so we can deal with alloc failures */
+ req->wb_lock_context = nfs_get_lock_context(ctx);
+ if (req->wb_lock_context == NULL) {
+ nfs_page_free(req);
+ return ERR_PTR(-ENOMEM);
+ }
+
/* Initialize the request struct. Initially, we assume a
* long write-back delay. This will be adjusted in
* update_nfs_request below if the region is not locked. */
@@ -79,7 +86,6 @@ nfs_create_request(struct nfs_open_context *ctx, struct inode *inode,
req->wb_pgbase = offset;
req->wb_bytes = count;
req->wb_context = get_nfs_open_context(ctx);
- req->wb_lock_context = nfs_get_lock_context(ctx);
kref_init(&req->wb_kref);
return req;
}