The branch main has been updated by rmacklem:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=8e59ec29e47f6ec64f54ddd88cab388ae536f0ff

commit 8e59ec29e47f6ec64f54ddd88cab388ae536f0ff
Author:     Rick Macklem <rmack...@freebsd.org>
AuthorDate: 2022-08-26 03:48:04 +0000
Commit:     Rick Macklem <rmack...@freebsd.org>
CommitDate: 2022-08-26 03:48:04 +0000

    nfscl: Fix handling of nd_slotid while handling NFSERR_BADSESSION
    
    When the NFSv4.1/4.2 client is handling a server error
    of NFSERR_BADSESSION, it retries RPCs with a new session.
    Without this patch, the nd_slotid was not being updated
    for the new session.
    
    This would result in a bogus console message like
    "Wrong session srvslot=X slot=Y" and then it would
    free the incorrect slot, often generating a
    "freeing free slot!!" console message as well.
    
    This patch fixes the problem.
    
    Note that FreeBSD NFSv4.1/4.2 servers only
    generate a NFSERR_BADSESSION error after a reboot
    or after a client does a DestroySession operation.
    
    PR:     260011
    MFC after:      1 week
---
 sys/fs/nfs/nfs_commonkrpc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/fs/nfs/nfs_commonkrpc.c b/sys/fs/nfs/nfs_commonkrpc.c
index 916d0182d3ee..d630c6c69ede 100644
--- a/sys/fs/nfs/nfs_commonkrpc.c
+++ b/sys/fs/nfs/nfs_commonkrpc.c
@@ -1169,6 +1169,9 @@ tryagain:
                                                *tl++ = txdr_unsigned(slotseq);
                                                *tl++ = txdr_unsigned(slotpos);
                                                *tl = txdr_unsigned(maxslot);
+                                               if ((nd->nd_flag &
+                                                   ND_HASSLOTID) != 0)
+                                                       nd->nd_slotid = slotpos;
                                        }
                                        if (reterr == NFSERR_BADSESSION ||
                                            reterr == 0) {

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