nfsserver: Do not increment seqid on BADSEQIDHEADmain

When returning NFSERR_BADSEQID, the server should not have incremented
the sequence ID, yet the call to nfsrv_checkseqid() a few lines above
does precisely that.  Instead, check for a legitimate retransmission
of the original successful request, and reject otherwise, before the
ticket is used and sequence ID incremented.

MFC after:	1 week
Fixes:		ff45b9fc1a8c ("Bjorn reported a problem...")
Sponsored by:	Klara, Inc.
Reviewed by:	rmacklem
Differential Revision:	https://reviews.freebsd.org/D61156

0 files changed, 0 insertions, 0 deletions