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The NFSv4 server incorrectly assumed that the high order words of

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the attribute bitmap argument would be non-zero. This caused an
interoperability problem for a recent patch to the Linux NFSv4 client.
The Linux folks have changed their patch to avoid this, but this
patch fixes the problem on the server.

Reported and tested by:	Andre Heider (a.heider@gmail.com)
MFC after:	3 days
This commit is contained in:
Rick Macklem 2013-07-20 22:35:32 +00:00
parent fd1fba7ce3
commit a36b76a787
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=253506
1 changed files with 7 additions and 7 deletions
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14
sys/fs/nfs/nfs_commonsubs.c
View file

@ -761,21 +761,21 @@ nfsrv_getattrbits(struct nfsrv_descript *nd, nfsattrbit_t *attrbitp, int *cntp,
error = NFSERR_BADXDR;
goto nfsmout;
}
if (cnt > NFSATTRBIT_MAXWORDS) {
if (cnt > NFSATTRBIT_MAXWORDS)
outcnt = NFSATTRBIT_MAXWORDS;
if (retnotsupp)
*retnotsupp = NFSERR_ATTRNOTSUPP;
} else {
else
outcnt = cnt;
}
NFSZERO_ATTRBIT(attrbitp);
if (outcnt > 0) {
NFSM_DISSECT(tl, u_int32_t *, outcnt * NFSX_UNSIGNED);
for (i = 0; i < outcnt; i++)
attrbitp->bits[i] = fxdr_unsigned(u_int32_t, *tl++);
}
if (cnt > outcnt)
error = nfsm_advance(nd, (cnt - outcnt) * NFSX_UNSIGNED, -1);
for (i = 0; i < (cnt - outcnt); i++) {
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
if (retnotsupp != NULL && *tl != 0)
*retnotsupp = NFSERR_ATTRNOTSUPP;
}
if (cntp)
*cntp = NFSX_UNSIGNED + (cnt * NFSX_UNSIGNED);
nfsmout: