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authorMi Jinlong <mijinlong@cn.fujitsu.com>2010-11-09 09:39:23 +0800
committerJ. Bruce Fields <bfields@redhat.com>2010-11-19 18:35:12 -0500
commit5afa040b307952bb804eba34b21646da2842e14d (patch)
tree3c7b1c14f3a9bb1a3a438d7f116be358ff4310e8 /fs/nfsd
parent9c335c0b8daf56b9f73479d00b1dd726e1fcca09 (diff)
downloadblackbird-op-linux-5afa040b307952bb804eba34b21646da2842e14d.tar.gz
blackbird-op-linux-5afa040b307952bb804eba34b21646da2842e14d.zip
NFSv4.1: Make sure nfsd can decode SP4_SSV correctly at exchange_id
According to RFC, the argument of ssv_sp_parms4 is: struct ssv_sp_parms4 { state_protect_ops4 ssp_ops; sec_oid4 ssp_hash_algs<>; sec_oid4 ssp_encr_algs<>; uint32_t ssp_window; uint32_t ssp_num_gss_handles; }; If client send a exchange_id with SP4_SSV, server cann't decode the SP4_SSV's ssp_hash_algs and ssp_encr_algs arguments correctly. Because the kernel treat the two arguments as a signal sec_oid4 struct, but should be a set of sec_oid4 struct. Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/nfs4xdr.c22
1 files changed, 15 insertions, 7 deletions
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index f35a94a04026..71d7d339e44a 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1005,7 +1005,7 @@ static __be32
nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
struct nfsd4_exchange_id *exid)
{
- int dummy;
+ int dummy, tmp;
DECODE_HEAD;
READ_BUF(NFS4_VERIFIER_SIZE);
@@ -1053,15 +1053,23 @@ nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
/* ssp_hash_algs<> */
READ_BUF(4);
- READ32(dummy);
- READ_BUF(dummy);
- p += XDR_QUADLEN(dummy);
+ READ32(tmp);
+ while (tmp--) {
+ READ_BUF(4);
+ READ32(dummy);
+ READ_BUF(dummy);
+ p += XDR_QUADLEN(dummy);
+ }
/* ssp_encr_algs<> */
READ_BUF(4);
- READ32(dummy);
- READ_BUF(dummy);
- p += XDR_QUADLEN(dummy);
+ READ32(tmp);
+ while (tmp--) {
+ READ_BUF(4);
+ READ32(dummy);
+ READ_BUF(dummy);
+ p += XDR_QUADLEN(dummy);
+ }
/* ssp_window and ssp_num_gss_handles */
READ_BUF(8);
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