Commit 51904b08 authored by J. Bruce Fields's avatar J. Bruce Fields

nfsd4: fix crash on unknown operation number

Unknown operation numbers are caught in nfsd4_decode_compound() which
sets op->opnum to OP_ILLEGAL and op->status to nfserr_op_illegal.  The
error causes the main loop in nfsd4_proc_compound() to skip most
processing.  But nfsd4_proc_compound also peeks ahead at the next
operation in one case and doesn't take similar precautions there.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent d1d84c96
...@@ -1272,7 +1272,8 @@ static bool need_wrongsec_check(struct svc_rqst *rqstp) ...@@ -1272,7 +1272,8 @@ static bool need_wrongsec_check(struct svc_rqst *rqstp)
*/ */
if (argp->opcnt == resp->opcnt) if (argp->opcnt == resp->opcnt)
return false; return false;
if (next->opnum == OP_ILLEGAL)
return false;
nextd = OPDESC(next); nextd = OPDESC(next);
/* /*
* Rest of 2.6.3.1.1: certain operations will return WRONGSEC * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
......
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