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| author | Julia Lawall <julia@diku.dk> | 2008-07-25 22:08:09 +0200 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2008-07-30 19:20:20 +0200 |
| commit | 53e6d8d182e97c5211da4ee1f163c840c7ecf8ca (patch) | |
| tree | 5f7eb6582c6dd05fa63aed15366198de7bbc6f40 | |
| parent | MAINTAINERS: mention lockd and sunrpc in nfs entries (diff) | |
| download | linux-53e6d8d182e97c5211da4ee1f163c840c7ecf8ca.tar.xz linux-53e6d8d182e97c5211da4ee1f163c840c7ecf8ca.zip | |
fs/nfsd/export.c: Adjust error handling code involving auth_domain_put
Once clp is assigned, it never becomes NULL, so we can make a label for it
in the error handling code. Because the call to path_lookup follows the
call to auth_domain_find, its error handling code should jump to this new
label.
The semantic match that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@r@
expression x,E;
statement S;
position p1,p2,p3;
@@
(
if ((x = auth_domain_find@p1(...)) == NULL || ...) S
|
x = auth_domain_find@p1(...)
... when != x
if (x == NULL || ...) S
)
<...
if@p3 (...) { ... when != auth_domain_put(x)
when != if (x) { ... auth_domain_put(x); ...}
return@p2 ...;
}
...>
(
return x;
|
return 0;
|
x = E
|
E = x
|
auth_domain_put(x)
)
@exists@
position r.p1,r.p2,r.p3;
expression x;
int ret != 0;
statement S;
@@
* x = auth_domain_find@p1(...)
<...
* if@p3 (...)
S
...>
* return@p2 \(NULL\|ret\);
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| -rw-r--r-- | fs/nfsd/export.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c index 33bfcf09db46..9dc036f18356 100644 --- a/fs/nfsd/export.c +++ b/fs/nfsd/export.c @@ -1023,7 +1023,7 @@ exp_export(struct nfsctl_export *nxp) /* Look up the dentry */ err = path_lookup(nxp->ex_path, 0, &nd); if (err) - goto out_unlock; + goto out_put_clp; err = -EINVAL; exp = exp_get_by_name(clp, nd.path.mnt, nd.path.dentry, NULL); @@ -1090,9 +1090,9 @@ finish: exp_put(exp); if (fsid_key && !IS_ERR(fsid_key)) cache_put(&fsid_key->h, &svc_expkey_cache); - if (clp) - auth_domain_put(clp); path_put(&nd.path); +out_put_clp: + auth_domain_put(clp); out_unlock: exp_writeunlock(); out: |