The patch titled
knfsd: nfsd4: fix handling of directories without default ACLs
has been added to the -mm tree. Its filename is
knfsd-nfsd4-fix-handling-of-directories-without-default-acls.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: knfsd: nfsd4: fix handling of directories without default ACLs
From: J. Bruce Fields <bfields@xxxxxxxxxxxxxx>
When setting an ACL that lacks inheritable ACEs on a directory, we should set
a default ACL of zero length, not a default ACL with all bits denied.
Signed-off-by: "J. Bruce Fields" <bfields@xxxxxxxxxxxxxx>
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/nfsd/nfs4acl.c | 21 ++++++++++++++++++++-
1 files changed, 20 insertions(+), 1 deletion(-)
diff -puN fs/nfsd/nfs4acl.c~knfsd-nfsd4-fix-handling-of-directories-without-default-acls fs/nfsd/nfs4acl.c
--- a/fs/nfsd/nfs4acl.c~knfsd-nfsd4-fix-handling-of-directories-without-default-acls
+++ a/fs/nfsd/nfs4acl.c
@@ -416,6 +416,7 @@ struct posix_ace_state_array {
* calculated so far: */
struct posix_acl_state {
+ int empty;
struct posix_ace_state owner;
struct posix_ace_state group;
struct posix_ace_state other;
@@ -431,6 +432,7 @@ init_state(struct posix_acl_state *state
int alloc;
memset(state, 0, sizeof(struct posix_acl_state));
+ state->empty = 1;
/*
* In the worst case, each individual acl could be for a distinct
* named user or group, but we don't no which, so we allocate
@@ -498,6 +500,20 @@ posix_state_to_acl(struct posix_acl_stat
int nace;
int i, error = 0;
+ /*
+ * ACLs with no ACEs are treated differently in the inheritable
+ * and effective cases: when there are no inheritable ACEs, we
+ * set a zero-length default posix acl:
+ */
+ if (state->empty && (flags & NFS4_ACL_TYPE_DEFAULT)) {
+ pacl = posix_acl_alloc(0, GFP_KERNEL);
+ return pacl ? pacl : ERR_PTR(-ENOMEM);
+ }
+ /*
+ * When there are no effective ACEs, the following will end
+ * up setting a 3-element effective posix ACL with all
+ * permissions zero.
+ */
nace = 4 + state->users->n + state->groups->n;
pacl = posix_acl_alloc(nace, GFP_KERNEL);
if (!pacl)
@@ -613,6 +629,8 @@ static void process_one_v4_ace(struct po
u32 mask = ace->access_mask;
int i;
+ state->empty = 0;
+
switch (ace2type(ace)) {
case ACL_USER_OBJ:
if (ace->type == NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE) {
@@ -717,7 +735,8 @@ int nfs4_acl_nfsv4_to_posix(struct nfs4_
ret = PTR_ERR(*pacl);
goto out_dstate;
}
- *dpacl = posix_state_to_acl(&default_acl_state, flags);
+ *dpacl = posix_state_to_acl(&default_acl_state,
+ flags | NFS4_ACL_TYPE_DEFAULT);
if (IS_ERR(*dpacl)) {
ret = PTR_ERR(*dpacl);
posix_acl_release(*pacl);
_
Patches currently in -mm which might be from bfields@xxxxxxxxxxxxxx are
auth_gss-unregister-gss_domain-when-unloading-module.patch
knfsd-nfsd4-fix-non-terminated-string.patch
knfsd-nfsd4-relax-checking-of-acl-inheritance-bits.patch
knfsd-nfsd4-simplify-nfsv4-posix-translation.patch
knfsd-nfsd4-represent-nfsv4-acl-with-array-instead-of-linked-list.patch
knfsd-nfsd4-fix-memory-leak-on-kmalloc-failure-in-savemem.patch
knfsd-nfsd4-fix-error-return-on-unsupported-acl.patch
knfsd-nfsd4-acls-dont-return-explicit-mask.patch
knfsd-nfsd4-acls-avoid-unnecessary-denies.patch
knfsd-nfsd4-fix-handling-of-directories-without-default-acls.patch
-
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