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NFSv4.0 fix client reference leak in callback

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[ Upstream commit 32cd3ee511f4e07ca25d71163b50e704808d22f4 ]

If there is an error during processing of a callback message, it leads
to refrence leak on the client structure and eventually an unclean
superblock.

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Olga Kornievskaia 2018-07-26 16:04:47 -04:00 committed by Greg Kroah-Hartman
parent 5c228c2f0c
commit 2d926fe3c2
1 changed files with 8 additions and 3 deletions
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11
fs/nfs/callback_xdr.c
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@ -911,16 +911,21 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r
if (hdr_arg.minorversion == 0) {
cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident);
if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp))
if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp)) {
if (cps.clp)
nfs_put_client(cps.clp);
goto out_invalidcred;
}
}
cps.minorversion = hdr_arg.minorversion;
hdr_res.taglen = hdr_arg.taglen;
hdr_res.tag = hdr_arg.tag;
if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0)
if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0) {
if (cps.clp)
nfs_put_client(cps.clp);
return rpc_system_err;
}
while (status == 0 && nops != hdr_arg.nops) {
status = process_op(nops, rqstp, &xdr_in,
argp, &xdr_out, resp, &cps);