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| author | Chuck Lever <chuck.lever@oracle.com> | 2007-10-26 13:32:03 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-01-30 02:05:44 -0500 |
| commit | bcecff77a9c743ff67fdddeabc30ef76a6877886 (patch) | |
| tree | 0e7a30f308501f87fbdad6fe65321b8bc35d89f9 | |
| parent | c957c526ef86e472359dadb4204dab8a503b687d (diff) | |
| download | op-kernel-dev-bcecff77a9c743ff67fdddeabc30ef76a6877886.zip op-kernel-dev-bcecff77a9c743ff67fdddeabc30ef76a6877886.tar.gz | |
NFS: Use unsigned intermediates for manipulating header lengths (NFSv4 XDR)
Clean up: prevent length underflow and mixed sign comparison when
unmarshalling NFS version 4 getacl, readdir, and readlink replies.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| -rw-r--r-- | fs/nfs/nfs4xdr.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 51dd380..2e1fe17 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -3476,10 +3476,11 @@ static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct n struct xdr_buf *rcvbuf = &req->rq_rcv_buf; struct page *page = *rcvbuf->pages; struct kvec *iov = rcvbuf->head; - unsigned int nr, pglen = rcvbuf->page_len; + size_t hdrlen; + u32 recvd, pglen = rcvbuf->page_len; __be32 *end, *entry, *p, *kaddr; - uint32_t len, attrlen, xlen; - int hdrlen, recvd, status; + unsigned int nr; + int status; status = decode_op_hdr(xdr, OP_READDIR); if (status) @@ -3503,6 +3504,7 @@ static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct n end = p + ((pglen + readdir->pgbase) >> 2); entry = p; for (nr = 0; *p++; nr++) { + u32 len, attrlen, xlen; if (end - p < 3) goto short_pkt; dprintk("cookie = %Lu, ", *((unsigned long long *)p)); @@ -3551,7 +3553,8 @@ static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req) { struct xdr_buf *rcvbuf = &req->rq_rcv_buf; struct kvec *iov = rcvbuf->head; - int hdrlen, len, recvd; + size_t hdrlen; + u32 len, recvd; __be32 *p; char *kaddr; int status; @@ -3646,7 +3649,8 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req, if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_ACL)) { - int hdrlen, recvd; + size_t hdrlen; + u32 recvd; /* We ignore &savep and don't do consistency checks on * the attr length. Let userspace figure it out.... */ |
