lkml.org 
[lkml]   [2006]   [Jul]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Date
Subject[PATCH] knfsd: Fix stale file handle problem with subtree_checking.
The following patch fixes a bug that was introduced since 2.6.17,
and should go in 2.6.18.

### Comments for Changeset

A recent patch:

h=7fc90ec93a5eb71f4b08403baf5ba7176b3ec6b1

moved the call to nfsd_setuser out of the 'find a dentry for a
filehandle' branch of fh_verify so that it would always be called.

This had the unfortunately side-effect of moving *after* the call
to decode_fh, so the prober fsuid was not set when nfsd_acceptable
was called, the 'permission' check did the wrong thing.

This patch moves the nfsd_setuser call back where it was, and add as
call in the other branch of the if.

Cc: "J. Bruce Fields" <bfields@fieldses.org>
Signed-off-by: Neil Brown <neilb@suse.de>

### Diffstat output
./fs/nfsd/nfsfh.c | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)

diff .prev/fs/nfsd/nfsfh.c ./fs/nfsd/nfsfh.c
--- .prev/fs/nfsd/nfsfh.c 2006-07-28 19:14:17.000000000 +1000
+++ ./fs/nfsd/nfsfh.c 2006-07-28 19:14:36.000000000 +1000
@@ -187,6 +187,11 @@ fh_verify(struct svc_rqst *rqstp, struct
goto out;
}

+ /* Set user creds for this exportpoint */
+ error = nfserrno(nfsd_setuser(rqstp, exp));
+ if (error)
+ goto out;
+
/*
* Look up the dentry using the NFS file handle.
*/
@@ -241,16 +246,17 @@ fh_verify(struct svc_rqst *rqstp, struct
dprintk("nfsd: fh_verify - just checking\n");
dentry = fhp->fh_dentry;
exp = fhp->fh_export;
+ /* Set user creds for this exportpoint; necessary even
+ * in the "just checking" case because this may be a
+ * filehandle that was created by fh_compose, and that
+ * is about to be used in another nfsv4 compound
+ * operation */
+ error = nfserrno(nfsd_setuser(rqstp, exp));
+ if (error)
+ goto out;
}
cache_get(&exp->h);

- /* Set user creds for this exportpoint; necessary even in the "just
- * checking" case because this may be a filehandle that was created by
- * fh_compose, and that is about to be used in another nfsv4 compound
- * operation */
- error = nfserrno(nfsd_setuser(rqstp, exp));
- if (error)
- goto out;

error = nfsd_mode_check(rqstp, dentry->d_inode->i_mode, type);
if (error)
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2006-07-28 11:47    [W:0.454 / U:1.012 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site