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authorLinus Torvalds <torvalds@linux-foundation.org>2019-07-10 18:43:43 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-10 18:43:43 -0700
commit028db3e290f15ac509084c0fc3b9d021f668f877 (patch)
tree7497244a90100f2464403063f88f83a555da03b3 /fs/cifs
parente9a83bd2322035ed9d7dcf35753d3f984d76c6a5 (diff)
downloadlinux-028db3e290f15ac509084c0fc3b9d021f668f877.tar.bz2
Revert "Merge tag 'keys-acl-20190703' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs"
This reverts merge 0f75ef6a9cff49ff612f7ce0578bced9d0b38325 (and thus effectively commits 7a1ade847596 ("keys: Provide KEYCTL_GRANT_PERMISSION") 2e12256b9a76 ("keys: Replace uid/gid/perm permissions checking with an ACL") that the merge brought in). It turns out that it breaks booting with an encrypted volume, and Eric biggers reports that it also breaks the fscrypt tests [1] and loading of in-kernel X.509 certificates [2]. The root cause of all the breakage is likely the same, but David Howells is off email so rather than try to work it out it's getting reverted in order to not impact the rest of the merge window. [1] https://lore.kernel.org/lkml/20190710011559.GA7973@sol.localdomain/ [2] https://lore.kernel.org/lkml/20190710013225.GB7973@sol.localdomain/ Link: https://lore.kernel.org/lkml/CAHk-=wjxoeMJfeBahnWH=9zShKp2bsVy527vo3_y8HfOdhwAAw@mail.gmail.com/ Reported-by: Eric Biggers <ebiggers@kernel.org> Cc: David Howells <dhowells@redhat.com> Cc: James Morris <jmorris@namei.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/cifs_spnego.c25
-rw-r--r--fs/cifs/cifsacl.c28
-rw-r--r--fs/cifs/connect.c4
3 files changed, 9 insertions, 48 deletions
diff --git a/fs/cifs/cifs_spnego.c b/fs/cifs/cifs_spnego.c
index d1b439ad0f1a..7f01c6e60791 100644
--- a/fs/cifs/cifs_spnego.c
+++ b/fs/cifs/cifs_spnego.c
@@ -32,25 +32,6 @@
#include "cifsproto.h"
static const struct cred *spnego_cred;
-static struct key_acl cifs_spnego_key_acl = {
- .usage = REFCOUNT_INIT(1),
- .nr_ace = 2,
- .possessor_viewable = true,
- .aces = {
- KEY_POSSESSOR_ACE(KEY_ACE_VIEW | KEY_ACE_SEARCH | KEY_ACE_READ),
- KEY_OWNER_ACE(KEY_ACE_VIEW),
- }
-};
-
-static struct key_acl cifs_spnego_keyring_acl = {
- .usage = REFCOUNT_INIT(1),
- .nr_ace = 2,
- .aces = {
- KEY_POSSESSOR_ACE(KEY_ACE_SEARCH | KEY_ACE_WRITE),
- KEY_OWNER_ACE(KEY_ACE_VIEW | KEY_ACE_READ | KEY_ACE_CLEAR),
- }
-};
-
/* create a new cifs key */
static int
cifs_spnego_key_instantiate(struct key *key, struct key_preparsed_payload *prep)
@@ -189,8 +170,7 @@ cifs_get_spnego_key(struct cifs_ses *sesInfo)
cifs_dbg(FYI, "key description = %s\n", description);
saved_cred = override_creds(spnego_cred);
- spnego_key = request_key(&cifs_spnego_key_type, description, "",
- &cifs_spnego_key_acl);
+ spnego_key = request_key(&cifs_spnego_key_type, description, "");
revert_creds(saved_cred);
#ifdef CONFIG_CIFS_DEBUG2
@@ -227,7 +207,8 @@ init_cifs_spnego(void)
keyring = keyring_alloc(".cifs_spnego",
GLOBAL_ROOT_UID, GLOBAL_ROOT_GID, cred,
- &cifs_spnego_keyring_acl,
+ (KEY_POS_ALL & ~KEY_POS_SETATTR) |
+ KEY_USR_VIEW | KEY_USR_READ,
KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
if (IS_ERR(keyring)) {
ret = PTR_ERR(keyring);
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index 78eed72f3af0..1d377b7f2860 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -33,25 +33,6 @@
#include "cifsproto.h"
#include "cifs_debug.h"
-static struct key_acl cifs_idmap_key_acl = {
- .usage = REFCOUNT_INIT(1),
- .nr_ace = 2,
- .possessor_viewable = true,
- .aces = {
- KEY_POSSESSOR_ACE(KEY_ACE_VIEW | KEY_ACE_SEARCH | KEY_ACE_READ),
- KEY_OWNER_ACE(KEY_ACE_VIEW),
- }
-};
-
-static struct key_acl cifs_idmap_keyring_acl = {
- .usage = REFCOUNT_INIT(1),
- .nr_ace = 2,
- .aces = {
- KEY_POSSESSOR_ACE(KEY_ACE_SEARCH | KEY_ACE_WRITE),
- KEY_OWNER_ACE(KEY_ACE_VIEW | KEY_ACE_READ),
- }
-};
-
/* security id for everyone/world system group */
static const struct cifs_sid sid_everyone = {
1, 1, {0, 0, 0, 0, 0, 1}, {0} };
@@ -317,8 +298,7 @@ id_to_sid(unsigned int cid, uint sidtype, struct cifs_sid *ssid)
rc = 0;
saved_cred = override_creds(root_cred);
- sidkey = request_key(&cifs_idmap_key_type, desc, "",
- &cifs_idmap_key_acl);
+ sidkey = request_key(&cifs_idmap_key_type, desc, "");
if (IS_ERR(sidkey)) {
rc = -EINVAL;
cifs_dbg(FYI, "%s: Can't map %cid %u to a SID\n",
@@ -423,8 +403,7 @@ try_upcall_to_get_id:
return -ENOMEM;
saved_cred = override_creds(root_cred);
- sidkey = request_key(&cifs_idmap_key_type, sidstr, "",
- &cifs_idmap_key_acl);
+ sidkey = request_key(&cifs_idmap_key_type, sidstr, "");
if (IS_ERR(sidkey)) {
rc = -EINVAL;
cifs_dbg(FYI, "%s: Can't map SID %s to a %cid\n",
@@ -502,7 +481,8 @@ init_cifs_idmap(void)
keyring = keyring_alloc(".cifs_idmap",
GLOBAL_ROOT_UID, GLOBAL_ROOT_GID, cred,
- &cifs_idmap_keyring_acl,
+ (KEY_POS_ALL & ~KEY_POS_SETATTR) |
+ KEY_USR_VIEW | KEY_USR_READ,
KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
if (IS_ERR(keyring)) {
ret = PTR_ERR(keyring);
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index ae6bae2ecb5d..714a359c7c8d 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2992,7 +2992,7 @@ cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
}
cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
- key = request_key(&key_type_logon, desc, "", NULL);
+ key = request_key(&key_type_logon, desc, "");
if (IS_ERR(key)) {
if (!ses->domainName) {
cifs_dbg(FYI, "domainName is NULL\n");
@@ -3003,7 +3003,7 @@ cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
/* didn't work, try to find a domain key */
sprintf(desc, "cifs:d:%s", ses->domainName);
cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
- key = request_key(&key_type_logon, desc, "", NULL);
+ key = request_key(&key_type_logon, desc, "");
if (IS_ERR(key)) {
rc = PTR_ERR(key);
goto out_err;