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| author | NeilBrown <neilb@suse.de> | 2006-07-30 03:03:16 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-31 13:28:37 -0700 |
| commit | d1bbf14f37261c2c0dba71404602e1ddcec069d2 (patch) | |
| tree | 7b01141c31b73f277079cbcdb88be6ac8da2add1 /fs/nfsd/nfsfh.c | |
| parent | a5ca63cb60892c1703998daf80d2d1b04cb70103 (diff) | |
| download | linux-stable-d1bbf14f37261c2c0dba71404602e1ddcec069d2.tar.gz linux-stable-d1bbf14f37261c2c0dba71404602e1ddcec069d2.tar.bz2 linux-stable-d1bbf14f37261c2c0dba71404602e1ddcec069d2.zip | |
[PATCH] knfsd: Fix stale file handle problem with subtree_checking.
A recent commit (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>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/nfsd/nfsfh.c')
| -rw-r--r-- | fs/nfsd/nfsfh.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c index ecc439d2565f..501d83884530 100644 --- a/fs/nfsd/nfsfh.c +++ b/fs/nfsd/nfsfh.c @@ -187,6 +187,11 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, int access) 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 svc_fh *fhp, int type, int access) 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) |