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authorTrond Myklebust <Trond.Myklebust@netapp.com>2010-10-23 15:34:20 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2010-10-23 15:34:20 -0400
commit7ad07353003d6ff69fe0b987813bb77b4d5ac23d (patch)
tree580d0284b6946454d9136b3568e69eb3524be8ed /fs/nfs/nfs4xdr.c
parent4a201d6e3f4253f918555cc7c27c418f8ac1bb65 (diff)
downloadop-kernel-dev-7ad07353003d6ff69fe0b987813bb77b4d5ac23d.zip
op-kernel-dev-7ad07353003d6ff69fe0b987813bb77b4d5ac23d.tar.gz
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 <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4xdr.c')
-rw-r--r--fs/nfs/nfs4xdr.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index ccfb1c92..a6b00e8 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;
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