pNFS: Handle allocation errors correctly in filelayout_alloc_layout_hdr()

commit 6df200f5d5191bdde4d2e408215383890f956781 upstream.

Return the NULL pointer when the allocation fails.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index 22d10623f5ee3b591de10631044cf90cef4d353a..b039f7f26d95c00b9c28bc908ab5976338c1157a 100644 (file)
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -1300,7 +1300,7 @@ filelayout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags)
        struct nfs4_filelayout *flo;
 
        flo = kzalloc(sizeof(*flo), gfp_flags);
-       return &flo->generic_hdr;
+       return flo != NULL ? &flo->generic_hdr : NULL;
 }
 
 static void