From 7ad07353003d6ff69fe0b987813bb77b4d5ac23d Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 23 Oct 2010 15:34:20 -0400 Subject: NFSv4: Fix up decode_attr_filehandle() to handle the case of empty fh pointer decode_attr_filehandle still needs to skip the XDR-encoded filehandle if someone passes a null pointer argument. Signed-off-by: Trond Myklebust --- fs/nfs/nfs4xdr.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) (limited to 'fs/nfs/nfs4xdr.c') diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index ccfb1c92b26..a6b00e84bd1 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -2883,12 +2883,8 @@ static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, stru __be32 *p; int len; - if (fh == NULL) { - bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE; - return 0; - } - - memset(fh, 0, sizeof(*fh)); + if (fh != NULL) + memset(fh, 0, sizeof(*fh)); if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U))) return -EIO; @@ -2899,11 +2895,13 @@ static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, stru len = be32_to_cpup(p); if (len > NFS4_FHSIZE) return -EIO; - fh->size = len; p = xdr_inline_decode(xdr, len); if (unlikely(!p)) goto out_overflow; - memcpy(fh->data, p, len); + if (fh != NULL) { + memcpy(fh->data, p, len); + fh->size = len; + } bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE; } return 0; -- cgit v1.2.3-70-g09d2