nfsd4: remember to put RW access on stateid destruction

Without this, for example,

	open read
	open read+write
	close

will result in a struct file leak.

Regression from 7d94784293096c0a46897acdb83be5abd9278ece "nfsd4: fix
downgrade/lock logic".

Cc: stable@kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 6 insertions, 11 deletions

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 12244cee1680..5e8806a9ef4e 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -385,14 +385,6 @@ static int nfs4_access_to_omode(u32 access)
         BUG();
 }
 
-static int nfs4_access_bmap_to_omode(struct nfs4_stateid *stp)
-{
-        unsigned int access;
-
-        set_access(&access, stp->st_access_bmap);
-        return nfs4_access_to_omode(access);
-}
-
 static void unhash_generic_stateid(struct nfs4_stateid *stp)
 {
         list_del(&stp->st_hash);
@@ -402,11 +394,14 @@ static void unhash_generic_stateid(struct nfs4_stateid *stp)
 
 static void free_generic_stateid(struct nfs4_stateid *stp)
 {
-        int oflag;
+        int i;
 
         if (stp->st_access_bmap) {
-                oflag = nfs4_access_bmap_to_omode(stp);
-                nfs4_file_put_access(stp->st_file, oflag);
+                for (i = 1; i < 4; i++) {
+                        if (test_bit(i, &stp->st_access_bmap))
+                                nfs4_file_put_access(stp->st_file,
+                                                nfs4_access_to_omode(i));
+                }
         }
         put_nfs4_file(stp->st_file);
         kmem_cache_free(stateid_slab, stp);