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authorTrond Myklebust <trond.myklebust@primarydata.com>2017-08-01 16:02:47 -0400
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2017-08-01 16:28:55 -0400
commitfd40559c8657418385e42f797e0b04bfc0add748 (patch)
tree2e90e12a96fc87b33c34be6082bf42be81322154 /fs/nfs/nfs4xdr.c
parentb7dbcc0e433f0f61acb89ed9861ec996be4f2b38 (diff)
downloadlinux-fd40559c8657418385e42f797e0b04bfc0add748.tar.bz2
NFSv4: Fix EXCHANGE_ID corrupt verifier issue
The verifier is allocated on the stack, but the EXCHANGE_ID RPC call was changed to be asynchronous by commit 8d89bd70bc939. If we interrrupt the call to rpc_wait_for_completion_task(), we can therefore end up transmitting random stack contents in lieu of the verifier. Fixes: 8d89bd70bc939 ("NFS setup async exchange_id") Cc: stable@vger.kernel.org # v4.9+ Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs/nfs4xdr.c')
-rw-r--r--fs/nfs/nfs4xdr.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index fa3eb361d4f8..37c8af003275 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -1785,7 +1785,7 @@ static void encode_exchange_id(struct xdr_stream *xdr,
int len = 0;
encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
- encode_nfs4_verifier(xdr, args->verifier);
+ encode_nfs4_verifier(xdr, &args->verifier);
encode_string(xdr, strlen(args->client->cl_owner_id),
args->client->cl_owner_id);