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nfsd: nfsd4_spo_must_allow() must check this is a v4 compound request

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commit 1244f0b2c3cecd3f349a877006e67c9492b41807 upstream.

If the request being processed is not a v4 compound request, then
examining the cstate can have undefined results.

This patch adds a check that the rpc procedure being executed
(rq_procinfo) is the NFSPROC4_COMPOUND procedure.

Reported-by: Olga Kornievskaia <okorniev@redhat.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: NeilBrown <neil@brown.name>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
NeilBrown 2025-03-28 11:05:59 +11:00 • committed by Greg Kroah-Hartman
commit bf78a2706c
1 changed files with 2 additions and 1 deletions
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3
fs/nfsd/nfs4proc.c
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@ -2750,7 +2750,8 @@ bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
u32 opiter;
if (!cstate->minorversion)
if (rqstp->rq_procinfo != &nfsd_version4.vs_proc[NFSPROC4_COMPOUND] ||
cstate->minorversion == 0)
return false;
if (cstate->spo_must_allowed == true)