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chromium / chromiumos / third_party / kernel-rebase-patches / ba418e97732e54f14a683795e612e8b91d4b5134 / . / a39d48763fa73a2814a70fce3003f6576ab6f22db265c4cd85e923f4.patch
blob: 9ffdfe72b8534014613c93a4404481b869b8af73 [file] [log] [blame]
From 2a8bb66be583910a2f25a89b12adf0a2f822e9b7 Mon Sep 17 00:00:00 2001
From: Mark Salyzyn <salyzyn@google.com>
Date: Mon, 4 Nov 2019 08:57:10 -0800
Subject: [PATCH] FROMLIST: Add flags option to get xattr method paired to
__vfs_getxattr
Add a flag option to get xattr method that could have a bit flag of
XATTR_NOSECURITY passed to it. XATTR_NOSECURITY is generally then
set in the __vfs_getxattr path when called by security
infrastructure.
This handles the case of a union filesystem driver that is being
requested by the security layer to report back the xattr data.
For the use case where access is to be blocked by the security layer.
The path then could be security(dentry) ->
__vfs_getxattr(dentry...XATTR_NOSECURITY) ->
handler->get(dentry...XATTR_NOSECURITY) ->
__vfs_getxattr(lower_dentry...XATTR_NOSECURITY) ->
lower_handler->get(lower_dentry...XATTR_NOSECURITY)
which would report back through the chain data and success as
expected, the logging security layer at the top would have the
data to determine the access permissions and report back the target
context that was blocked.
Without the get handler flag, the path on a union filesystem would be
the errant security(dentry) -> __vfs_getxattr(dentry) ->
handler->get(dentry) -> vfs_getxattr(lower_dentry) -> nested ->
security(lower_dentry, log off) -> lower_handler->get(lower_dentry)
which would report back through the chain no data, and -EACCES.
For selinux for both cases, this would translate to a correctly
determined blocked access. In the first case with this change a correct avc
log would be reported, in the second legacy case an incorrect avc log
would be reported against an uninitialized u:object_r:unlabeled:s0
context making the logs cosmetically useless for audit2allow.
This patch series is inert and is the wide-spread addition of the
flags option for xattr functions, and a replacement of __vfs_getxattr
with __vfs_getxattr(...XATTR_NOSECURITY).
Signed-off-by: Mark Salyzyn <salyzyn@android.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Jan Kara <jack@suse.cz>
Acked-by: Jeff Layton <jlayton@kernel.org>
Acked-by: David Sterba <dsterba@suse.com>
Acked-by: Darrick J. Wong <darrick.wong@oracle.com>
Acked-by: Mike Marshall <hubcap@omnibond.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: linux-kernel@vger.kernel.org
Cc: kernel-team@android.com
Cc: linux-security-module@vger.kernel.org
(cherry picked from (rejected from archive because of too many recipients))
Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 133515582
Bug: 136124883
Bug: 129319403
Change-Id: Iabbb8771939d5f66667a26bb23ddf4c562c349a1
Conflicts:
security/integrity/evm/evm_main.c
[rebase510(groeck): Context conflicts]
Signed-off-by: Guenter Roeck <groeck@chromium.org>
---
Documentation/filesystems/locking.rst | 2 +-
fs/9p/acl.c | 3 +-
fs/9p/xattr.c | 3 +-
fs/afs/xattr.c | 10 +++----
fs/btrfs/xattr.c | 3 +-
fs/ceph/xattr.c | 3 +-
fs/cifs/xattr.c | 2 +-
fs/ecryptfs/inode.c | 6 ++--
fs/ecryptfs/mmap.c | 5 ++--
fs/erofs/xattr.c | 3 +-
fs/ext2/xattr_security.c | 2 +-
fs/ext2/xattr_trusted.c | 2 +-
fs/ext2/xattr_user.c | 2 +-
fs/ext4/xattr_security.c | 2 +-
fs/ext4/xattr_trusted.c | 2 +-
fs/ext4/xattr_user.c | 2 +-
fs/f2fs/xattr.c | 4 +--
fs/fuse/xattr.c | 4 +--
fs/gfs2/xattr.c | 3 +-
fs/hfs/attr.c | 2 +-
fs/hfsplus/xattr.c | 3 +-
fs/hfsplus/xattr_security.c | 3 +-
fs/hfsplus/xattr_trusted.c | 3 +-
fs/hfsplus/xattr_user.c | 3 +-
fs/jffs2/security.c | 3 +-
fs/jffs2/xattr_trusted.c | 3 +-
fs/jffs2/xattr_user.c | 3 +-
fs/jfs/xattr.c | 5 ++--
fs/kernfs/inode.c | 3 +-
fs/nfs/nfs4proc.c | 6 ++--
fs/ocfs2/xattr.c | 9 ++++--
fs/orangefs/xattr.c | 3 +-
fs/overlayfs/super.c | 8 ++++--
fs/posix_acl.c | 2 +-
fs/reiserfs/xattr_security.c | 3 +-
fs/reiserfs/xattr_trusted.c | 3 +-
fs/reiserfs/xattr_user.c | 3 +-
fs/squashfs/xattr.c | 2 +-
fs/ubifs/xattr.c | 3 +-
fs/xattr.c | 41 ++++++++++++++-------------
fs/xfs/xfs_xattr.c | 3 +-
include/linux/xattr.h | 9 +++---
include/uapi/linux/xattr.h | 7 +++--
mm/shmem.c | 3 +-
net/socket.c | 3 +-
security/commoncap.c | 8 ++++--
security/integrity/evm/evm_main.c | 4 ++-
security/selinux/hooks.c | 16 +++++++----
security/smack/smack_lsm.c | 7 +++--
49 files changed, 143 insertions(+), 94 deletions(-)
diff --git a/Documentation/filesystems/locking.rst b/Documentation/filesystems/locking.rst
index b7dcc86c92a4..ef5e6c20c4ba 100644
--- a/Documentation/filesystems/locking.rst
+++ b/Documentation/filesystems/locking.rst
@@ -125,7 +125,7 @@ prototypes::
bool (*list)(struct dentry *dentry);
int (*get)(const struct xattr_handler *handler, struct dentry *dentry,
struct inode *inode, const char *name, void *buffer,
- size_t size);
+ size_t size, int flags);
int (*set)(const struct xattr_handler *handler,
struct user_namespace *mnt_userns,
struct dentry *dentry, struct inode *inode, const char *name,
diff --git a/fs/9p/acl.c b/fs/9p/acl.c
index bb1b286c49ae..675086d728fb 100644
--- a/fs/9p/acl.c
+++ b/fs/9p/acl.c
@@ -214,7 +214,8 @@ int v9fs_acl_mode(struct inode *dir, umode_t *modep,
static int v9fs_xattr_get_acl(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
struct v9fs_session_info *v9ses;
struct posix_acl *acl;
diff --git a/fs/9p/xattr.c b/fs/9p/xattr.c
index ee331845e2c7..57f88b9ae8ef 100644
--- a/fs/9p/xattr.c
+++ b/fs/9p/xattr.c
@@ -149,7 +149,8 @@ ssize_t v9fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
static int v9fs_xattr_handler_get(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
const char *full_name = xattr_full_name(handler, name);
diff --git a/fs/afs/xattr.c b/fs/afs/xattr.c
index 7751b0b3f81d..172013d3e0dd 100644
--- a/fs/afs/xattr.c
+++ b/fs/afs/xattr.c
@@ -36,7 +36,7 @@ static const struct afs_operation_ops afs_fetch_acl_operation = {
static int afs_xattr_get_acl(const struct xattr_handler *handler,
struct dentry *dentry,
struct inode *inode, const char *name,
- void *buffer, size_t size)
+ void *buffer, size_t size, int flags)
{
struct afs_operation *op;
struct afs_vnode *vnode = AFS_FS_I(inode);
@@ -138,7 +138,7 @@ static const struct afs_operation_ops yfs_fetch_opaque_acl_operation = {
static int afs_xattr_get_yfs(const struct xattr_handler *handler,
struct dentry *dentry,
struct inode *inode, const char *name,
- void *buffer, size_t size)
+ void *buffer, size_t size, int flags)
{
struct afs_operation *op;
struct afs_vnode *vnode = AFS_FS_I(inode);
@@ -268,7 +268,7 @@ static const struct xattr_handler afs_xattr_yfs_handler = {
static int afs_xattr_get_cell(const struct xattr_handler *handler,
struct dentry *dentry,
struct inode *inode, const char *name,
- void *buffer, size_t size)
+ void *buffer, size_t size, int flags)
{
struct afs_vnode *vnode = AFS_FS_I(inode);
struct afs_cell *cell = vnode->volume->cell;
@@ -295,7 +295,7 @@ static const struct xattr_handler afs_xattr_afs_cell_handler = {
static int afs_xattr_get_fid(const struct xattr_handler *handler,
struct dentry *dentry,
struct inode *inode, const char *name,
- void *buffer, size_t size)
+ void *buffer, size_t size, int flags)
{
struct afs_vnode *vnode = AFS_FS_I(inode);
char text[16 + 1 + 24 + 1 + 8 + 1];
@@ -333,7 +333,7 @@ static const struct xattr_handler afs_xattr_afs_fid_handler = {
static int afs_xattr_get_volume(const struct xattr_handler *handler,
struct dentry *dentry,
struct inode *inode, const char *name,
- void *buffer, size_t size)
+ void *buffer, size_t size, int flags)
{
struct afs_vnode *vnode = AFS_FS_I(inode);
const char *volname = vnode->volume->name;
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index 8a4514283a4b..ee68273fdc0a 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -378,7 +378,8 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
static int btrfs_xattr_handler_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
name = xattr_full_name(handler, name);
return btrfs_getxattr(inode, name, buffer, size);
diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index 02f59bcb4f27..c7c0760f6143 100644
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -1230,7 +1230,8 @@ int __ceph_setxattr(struct inode *inode, const char *name,
static int ceph_get_xattr_handler(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
- const char *name, void *value, size_t size)
+ const char *name, void *value, size_t size,
+ int flags)
{
if (!ceph_is_valid_xattr(name))
return -EOPNOTSUPP;
diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c
index 41a611e76bb7..6314ed1b6802 100644
--- a/fs/cifs/xattr.c
+++ b/fs/cifs/xattr.c
@@ -289,7 +289,7 @@ static int cifs_creation_time_get(struct dentry *dentry, struct inode *inode,
static int cifs_xattr_get(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
- const char *name, void *value, size_t size)
+ const char *name, void *value, size_t size, int flags)
{
ssize_t rc = -EOPNOTSUPP;
unsigned int xid;
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 18e9285fbb4c..86897016cb26 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -1065,7 +1065,8 @@ ecryptfs_getxattr_lower(struct dentry *lower_dentry, struct inode *lower_inode,
goto out;
}
inode_lock(lower_inode);
- rc = __vfs_getxattr(lower_dentry, lower_inode, name, value, size);
+ rc = __vfs_getxattr(&init_user_ns, lower_dentry, lower_inode, name,
+ value, size, XATTR_NOSECURITY);
inode_unlock(lower_inode);
out:
return rc;
@@ -1150,7 +1151,8 @@ const struct inode_operations ecryptfs_main_iops = {
static int ecryptfs_xattr_get(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
return ecryptfs_getxattr(dentry, inode, name, buffer, size);
}
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 2f333a40ff4d..b24cbb6eb7bf 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -421,8 +421,9 @@ static int ecryptfs_write_inode_size_to_xattr(struct inode *ecryptfs_inode)
goto out;
}
inode_lock(lower_inode);
- size = __vfs_getxattr(lower_dentry, lower_inode, ECRYPTFS_XATTR_NAME,
- xattr_virt, PAGE_SIZE);
+ size = __vfs_getxattr(&init_user_ns, lower_dentry, lower_inode,
+ ECRYPTFS_XATTR_NAME, xattr_virt, PAGE_SIZE,
+ XATTR_NOSECURITY);
if (size < 0)
size = 8;
put_unaligned_be64(i_size_read(ecryptfs_inode), xattr_virt);
diff --git a/fs/erofs/xattr.c b/fs/erofs/xattr.c
index 47314a26767a..6330bca9d91d 100644
--- a/fs/erofs/xattr.c
+++ b/fs/erofs/xattr.c
@@ -471,7 +471,8 @@ int erofs_getxattr(struct inode *inode, int index,
static int erofs_xattr_generic_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
struct erofs_sb_info *const sbi = EROFS_I_SB(inode);
diff --git a/fs/ext2/xattr_security.c b/fs/ext2/xattr_security.c
index ebade1f52451..91c716ec140f 100644
--- a/fs/ext2/xattr_security.c
+++ b/fs/ext2/xattr_security.c
@@ -11,7 +11,7 @@
static int
ext2_xattr_security_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size, int flags)
{
return ext2_xattr_get(inode, EXT2_XATTR_INDEX_SECURITY, name,
buffer, size);
diff --git a/fs/ext2/xattr_trusted.c b/fs/ext2/xattr_trusted.c
index 18a87d5dd1ab..362f83e43c4c 100644
--- a/fs/ext2/xattr_trusted.c
+++ b/fs/ext2/xattr_trusted.c
@@ -18,7 +18,7 @@ ext2_xattr_trusted_list(struct dentry *dentry)
static int
ext2_xattr_trusted_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size, int flags)
{
return ext2_xattr_get(inode, EXT2_XATTR_INDEX_TRUSTED, name,
buffer, size);
diff --git a/fs/ext2/xattr_user.c b/fs/ext2/xattr_user.c
index 58092449f8ff..37936d5979c8 100644
--- a/fs/ext2/xattr_user.c
+++ b/fs/ext2/xattr_user.c
@@ -20,7 +20,7 @@ ext2_xattr_user_list(struct dentry *dentry)
static int
ext2_xattr_user_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size, int flags)
{
if (!test_opt(inode->i_sb, XATTR_USER))
return -EOPNOTSUPP;
diff --git a/fs/ext4/xattr_security.c b/fs/ext4/xattr_security.c
index 8213f66f7b2d..f85699f6ad17 100644
--- a/fs/ext4/xattr_security.c
+++ b/fs/ext4/xattr_security.c
@@ -15,7 +15,7 @@
static int
ext4_xattr_security_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size, int flags)
{
return ext4_xattr_get(inode, EXT4_XATTR_INDEX_SECURITY,
name, buffer, size);
diff --git a/fs/ext4/xattr_trusted.c b/fs/ext4/xattr_trusted.c
index 7c21ffb26d25..9b550a8a5c0b 100644
--- a/fs/ext4/xattr_trusted.c
+++ b/fs/ext4/xattr_trusted.c
@@ -22,7 +22,7 @@ ext4_xattr_trusted_list(struct dentry *dentry)
static int
ext4_xattr_trusted_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size, int flags)
{
return ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED,
name, buffer, size);
diff --git a/fs/ext4/xattr_user.c b/fs/ext4/xattr_user.c
index 2fe7ff0a479c..5483b158c5b5 100644
--- a/fs/ext4/xattr_user.c
+++ b/fs/ext4/xattr_user.c
@@ -21,7 +21,7 @@ ext4_xattr_user_list(struct dentry *dentry)
static int
ext4_xattr_user_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size, int flags)
{
if (!test_opt(inode->i_sb, XATTR_USER))
return -EOPNOTSUPP;
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index 490f843ec3bf..a69a0588539b 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -44,7 +44,7 @@ static void xattr_free(struct f2fs_sb_info *sbi, void *xattr_addr,
static int f2fs_xattr_generic_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size, int flags)
{
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
@@ -100,7 +100,7 @@ static bool f2fs_xattr_trusted_list(struct dentry *dentry)
static int f2fs_xattr_advise_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size, int flags)
{
if (buffer)
*((char *)buffer) = F2FS_I(inode)->i_advise;
diff --git a/fs/fuse/xattr.c b/fs/fuse/xattr.c
index 1a7d7ace54e1..dc890e12997e 100644
--- a/fs/fuse/xattr.c
+++ b/fs/fuse/xattr.c
@@ -179,7 +179,7 @@ int fuse_removexattr(struct inode *inode, const char *name)
static int fuse_xattr_get(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
- const char *name, void *value, size_t size)
+ const char *name, void *value, size_t size, int flags)
{
if (fuse_is_bad(inode))
return -EIO;
@@ -209,7 +209,7 @@ static bool no_xattr_list(struct dentry *dentry)
static int no_xattr_get(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
- const char *name, void *value, size_t size)
+ const char *name, void *value, size_t size, int flags)
{
return -EOPNOTSUPP;
}
diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c
index 124b3d5a7266..617f83de2614 100644
--- a/fs/gfs2/xattr.c
+++ b/fs/gfs2/xattr.c
@@ -610,7 +610,8 @@ static int __gfs2_xattr_get(struct inode *inode, const char *name,
static int gfs2_xattr_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_holder gh;
diff --git a/fs/hfs/attr.c b/fs/hfs/attr.c
index 2bd54efaf416..c42385c33d2a 100644
--- a/fs/hfs/attr.c
+++ b/fs/hfs/attr.c
@@ -115,7 +115,7 @@ static ssize_t __hfs_getxattr(struct inode *inode, enum hfs_xattr_type type,
static int hfs_xattr_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *value, size_t size)
+ const char *name, void *value, size_t size, int flags)
{
return __hfs_getxattr(inode, handler->flags, value, size);
}
diff --git a/fs/hfsplus/xattr.c b/fs/hfsplus/xattr.c
index 4d169c5a2673..67b9d4a94616 100644
--- a/fs/hfsplus/xattr.c
+++ b/fs/hfsplus/xattr.c
@@ -839,7 +839,8 @@ static int hfsplus_removexattr(struct inode *inode, const char *name)
static int hfsplus_osx_getxattr(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
/*
* Don't allow retrieving properly prefixed attributes
diff --git a/fs/hfsplus/xattr_security.c b/fs/hfsplus/xattr_security.c
index c1c7a16cbf21..1b28b83c201e 100644
--- a/fs/hfsplus/xattr_security.c
+++ b/fs/hfsplus/xattr_security.c
@@ -15,7 +15,8 @@
static int hfsplus_security_getxattr(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer,
+ size_t size, int flags)
{
return hfsplus_getxattr(inode, name, buffer, size,
XATTR_SECURITY_PREFIX,
diff --git a/fs/hfsplus/xattr_trusted.c b/fs/hfsplus/xattr_trusted.c
index e150372ec564..7caeff6243d7 100644
--- a/fs/hfsplus/xattr_trusted.c
+++ b/fs/hfsplus/xattr_trusted.c
@@ -14,7 +14,8 @@
static int hfsplus_trusted_getxattr(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer,
+ size_t size, int flags)
{
return hfsplus_getxattr(inode, name, buffer, size,
XATTR_TRUSTED_PREFIX,
diff --git a/fs/hfsplus/xattr_user.c b/fs/hfsplus/xattr_user.c
index a6b60b153916..ca74443eb123 100644
--- a/fs/hfsplus/xattr_user.c
+++ b/fs/hfsplus/xattr_user.c
@@ -14,7 +14,8 @@
static int hfsplus_user_getxattr(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
return hfsplus_getxattr(inode, name, buffer, size,
diff --git a/fs/jffs2/security.c b/fs/jffs2/security.c
index aef5522551db..c443c4e47208 100644
--- a/fs/jffs2/security.c
+++ b/fs/jffs2/security.c
@@ -50,7 +50,8 @@ int jffs2_init_security(struct inode *inode, struct inode *dir,
/* ---- XATTR Handler for "security.*" ----------------- */
static int jffs2_security_getxattr(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
return do_jffs2_getxattr(inode, JFFS2_XPREFIX_SECURITY,
name, buffer, size);
diff --git a/fs/jffs2/xattr_trusted.c b/fs/jffs2/xattr_trusted.c
index cc3f24883e7d..95ed9ce1eaaf 100644
--- a/fs/jffs2/xattr_trusted.c
+++ b/fs/jffs2/xattr_trusted.c
@@ -18,7 +18,8 @@
static int jffs2_trusted_getxattr(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
return do_jffs2_getxattr(inode, JFFS2_XPREFIX_TRUSTED,
name, buffer, size);
diff --git a/fs/jffs2/xattr_user.c b/fs/jffs2/xattr_user.c
index fb945977c013..418bb8d2758f 100644
--- a/fs/jffs2/xattr_user.c
+++ b/fs/jffs2/xattr_user.c
@@ -18,7 +18,8 @@
static int jffs2_user_getxattr(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
return do_jffs2_getxattr(inode, JFFS2_XPREFIX_USER,
name, buffer, size);
diff --git a/fs/jfs/xattr.c b/fs/jfs/xattr.c
index f9273f6901c8..8728df337090 100644
--- a/fs/jfs/xattr.c
+++ b/fs/jfs/xattr.c
@@ -925,7 +925,7 @@ static int __jfs_xattr_set(struct inode *inode, const char *name,
static int jfs_xattr_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *value, size_t size)
+ const char *name, void *value, size_t size, int flags)
{
name = xattr_full_name(handler, name);
return __jfs_getxattr(inode, name, value, size);
@@ -943,7 +943,8 @@ static int jfs_xattr_set(const struct xattr_handler *handler,
static int jfs_xattr_get_os2(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *value, size_t size)
+ const char *name, void *value, size_t size,
+ int flags)
{
if (is_known_namespace(name))
return -EOPNOTSUPP;
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index d73950fc3d57..cfe021032c0c 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -313,7 +313,8 @@ int kernfs_xattr_set(struct kernfs_node *kn, const char *name,
static int kernfs_vfs_xattr_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *suffix, void *value, size_t size)
+ const char *suffix, void *value, size_t size,
+ int flags)
{
const char *name = xattr_full_name(handler, suffix);
struct kernfs_node *kn = inode->i_private;
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index c65c4b41e2c1..32174a2a1a26 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -7498,7 +7498,8 @@ static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *key, void *buf, size_t buflen)
+ const char *key, void *buf, size_t buflen,
+ int flags)
{
return nfs4_proc_get_acl(inode, buf, buflen);
}
@@ -7524,7 +7525,8 @@ static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *key, void *buf, size_t buflen)
+ const char *key, void *buf, size_t buflen,
+ int flags)
{
if (security_ismaclabel(key))
return nfs4_get_security_label(inode, buf, buflen);
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 36ae47a4aef6..a0adc5ba37a1 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -7242,7 +7242,8 @@ int ocfs2_init_security_and_acl(struct inode *dir,
*/
static int ocfs2_xattr_security_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY,
name, buffer, size);
@@ -7315,7 +7316,8 @@ const struct xattr_handler ocfs2_xattr_security_handler = {
*/
static int ocfs2_xattr_trusted_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED,
name, buffer, size);
@@ -7342,7 +7344,8 @@ const struct xattr_handler ocfs2_xattr_trusted_handler = {
*/
static int ocfs2_xattr_user_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
diff --git a/fs/orangefs/xattr.c b/fs/orangefs/xattr.c
index 9a5b757fbd2f..2cc3bc61235b 100644
--- a/fs/orangefs/xattr.c
+++ b/fs/orangefs/xattr.c
@@ -542,7 +542,8 @@ static int orangefs_xattr_get_default(const struct xattr_handler *handler,
struct inode *inode,
const char *name,
void *buffer,
- size_t size)
+ size_t size,
+ int flags)
{
return orangefs_inode_getxattr(inode, name, buffer, size);
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index fdd72f1a9c5e..7f0323ce2cc6 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -988,7 +988,7 @@ static unsigned int ovl_split_lowerdirs(char *str)
static int __maybe_unused
ovl_posix_acl_xattr_get(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size, int flags)
{
return ovl_xattr_get(dentry, inode, handler->name, buffer, size);
}
@@ -1054,7 +1054,8 @@ ovl_posix_acl_xattr_set(const struct xattr_handler *handler,
static int ovl_own_xattr_get(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
return -EOPNOTSUPP;
}
@@ -1070,7 +1071,8 @@ static int ovl_own_xattr_set(const struct xattr_handler *handler,
static int ovl_other_xattr_get(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
return ovl_xattr_get(dentry, inode, name, buffer, size);
}
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index f3309a7edb49..9ddc1bf0dc5e 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -877,7 +877,7 @@ EXPORT_SYMBOL (posix_acl_to_xattr);
static int
posix_acl_xattr_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *value, size_t size)
+ const char *name, void *value, size_t size, int flags)
{
struct posix_acl *acl;
int error;
diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c
index 8965c8e5e172..1fd1359a98ba 100644
--- a/fs/reiserfs/xattr_security.c
+++ b/fs/reiserfs/xattr_security.c
@@ -11,7 +11,8 @@
static int
security_get(const struct xattr_handler *handler, struct dentry *unused,
- struct inode *inode, const char *name, void *buffer, size_t size)
+ struct inode *inode, const char *name, void *buffer, size_t size,
+ int flags)
{
if (IS_PRIVATE(inode))
return -EPERM;
diff --git a/fs/reiserfs/xattr_trusted.c b/fs/reiserfs/xattr_trusted.c
index d853cea2afcd..f54b848e9504 100644
--- a/fs/reiserfs/xattr_trusted.c
+++ b/fs/reiserfs/xattr_trusted.c
@@ -10,7 +10,8 @@
static int
trusted_get(const struct xattr_handler *handler, struct dentry *unused,
- struct inode *inode, const char *name, void *buffer, size_t size)
+ struct inode *inode, const char *name, void *buffer, size_t size,
+ int flags)
{
if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode))
return -EPERM;
diff --git a/fs/reiserfs/xattr_user.c b/fs/reiserfs/xattr_user.c
index 65d9cd10a5ea..ddd98cdab24d 100644
--- a/fs/reiserfs/xattr_user.c
+++ b/fs/reiserfs/xattr_user.c
@@ -9,7 +9,8 @@
static int
user_get(const struct xattr_handler *handler, struct dentry *unused,
- struct inode *inode, const char *name, void *buffer, size_t size)
+ struct inode *inode, const char *name, void *buffer, size_t size,
+ int flags)
{
if (!reiserfs_xattrs_user(inode->i_sb))
return -EOPNOTSUPP;
diff --git a/fs/squashfs/xattr.c b/fs/squashfs/xattr.c
index e1e3f3dd5a06..d8d58c990652 100644
--- a/fs/squashfs/xattr.c
+++ b/fs/squashfs/xattr.c
@@ -204,7 +204,7 @@ static int squashfs_xattr_handler_get(const struct xattr_handler *handler,
struct dentry *unused,
struct inode *inode,
const char *name,
- void *buffer, size_t size)
+ void *buffer, size_t size, int flags)
{
return squashfs_xattr_get(inode, handler->flags, name,
buffer, size);
diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c
index 6b1e9830b274..cd38f19e410e 100644
--- a/fs/ubifs/xattr.c
+++ b/fs/ubifs/xattr.c
@@ -671,7 +671,8 @@ int ubifs_init_security(struct inode *dentry, struct inode *inode,
static int xattr_get(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
dbg_gen("xattr '%s', ino %lu ('%pd'), buf size %zd", name,
inode->i_ino, dentry, size);
diff --git a/fs/xattr.c b/fs/xattr.c
index b3444e06cded..50b1fb199c62 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -368,7 +368,7 @@ vfs_getxattr_alloc(struct user_namespace *mnt_userns, struct dentry *dentry,
return PTR_ERR(handler);
if (!handler->get)
return -EOPNOTSUPP;
- error = handler->get(handler, dentry, inode, name, NULL, 0);
+ error = handler->get(handler, dentry, inode, name, NULL, 0, 0);
if (error < 0)
return error;
@@ -379,33 +379,21 @@ vfs_getxattr_alloc(struct user_namespace *mnt_userns, struct dentry *dentry,
memset(value, 0, error + 1);
}
- error = handler->get(handler, dentry, inode, name, value, error);
+ error = handler->get(handler, dentry, inode, name, value, error, 0);
*xattr_value = value;
return error;
}
ssize_t
-__vfs_getxattr(struct dentry *dentry, struct inode *inode, const char *name,
- void *value, size_t size)
+__vfs_getxattr(struct user_namespace *mnt_userns, struct dentry *dentry,
+ struct inode *inode, const char *name, void *value, size_t size,
+ int flags)
{
const struct xattr_handler *handler;
-
- handler = xattr_resolve_name(inode, &name);
- if (IS_ERR(handler))
- return PTR_ERR(handler);
- if (!handler->get)
- return -EOPNOTSUPP;
- return handler->get(handler, dentry, inode, name, value, size);
-}
-EXPORT_SYMBOL(__vfs_getxattr);
-
-ssize_t
-vfs_getxattr(struct user_namespace *mnt_userns, struct dentry *dentry,
- const char *name, void *value, size_t size)
-{
- struct inode *inode = dentry->d_inode;
int error;
+ if (flags & XATTR_NOSECURITY)
+ goto nolsm;
error = xattr_permission(mnt_userns, inode, name, MAY_READ);
if (error)
return error;
@@ -428,7 +416,20 @@ vfs_getxattr(struct user_namespace *mnt_userns, struct dentry *dentry,
return ret;
}
nolsm:
- return __vfs_getxattr(dentry, inode, name, value, size);
+ handler = xattr_resolve_name(inode, &name);
+ if (IS_ERR(handler))
+ return PTR_ERR(handler);
+ if (!handler->get)
+ return -EOPNOTSUPP;
+ return handler->get(handler, dentry, inode, name, value, size, flags);
+}
+EXPORT_SYMBOL(__vfs_getxattr);
+
+ssize_t
+vfs_getxattr(struct user_namespace *mnt_userns, struct dentry *dentry,
+ const char *name, void *value, size_t size)
+{
+ return __vfs_getxattr(mnt_userns, dentry, dentry->d_inode, name, value, size, 0);
}
EXPORT_SYMBOL_GPL(vfs_getxattr);
diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
index 12be32f66dc1..585f1f7c69b2 100644
--- a/fs/xfs/xfs_xattr.c
+++ b/fs/xfs/xfs_xattr.c
@@ -19,7 +19,8 @@
static int
xfs_xattr_get(const struct xattr_handler *handler, struct dentry *unused,
- struct inode *inode, const char *name, void *value, size_t size)
+ struct inode *inode, const char *name, void *value, size_t size,
+ int flags)
{
struct xfs_da_args args = {
.dp = XFS_I(inode),
diff --git a/include/linux/xattr.h b/include/linux/xattr.h
index 4c379d23ec6e..d04b68e1b0da 100644
--- a/include/linux/xattr.h
+++ b/include/linux/xattr.h
@@ -32,10 +32,10 @@ struct xattr_handler {
const char *prefix;
int flags; /* fs private flags */
bool (*list)(struct dentry *dentry);
- int (*get)(const struct xattr_handler *, struct dentry *dentry,
+ int (*get)(const struct xattr_handler *handler, struct dentry *dentry,
struct inode *inode, const char *name, void *buffer,
- size_t size);
- int (*set)(const struct xattr_handler *,
+ size_t size, int flags);
+ int (*set)(const struct xattr_handler *handler,
struct user_namespace *mnt_userns, struct dentry *dentry,
struct inode *inode, const char *name, const void *buffer,
size_t size, int flags);
@@ -49,7 +49,8 @@ struct xattr {
size_t value_len;
};
-ssize_t __vfs_getxattr(struct dentry *, struct inode *, const char *, void *, size_t);
+ssize_t __vfs_getxattr(struct user_namespace *, struct dentry *, struct inode *,
+ const char *, void *, size_t);
ssize_t vfs_getxattr(struct user_namespace *, struct dentry *, const char *,
void *, size_t);
ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size);
diff --git a/include/uapi/linux/xattr.h b/include/uapi/linux/xattr.h
index 9463db2dfa9d..d22191a3cf09 100644
--- a/include/uapi/linux/xattr.h
+++ b/include/uapi/linux/xattr.h
@@ -18,8 +18,11 @@
#if __UAPI_DEF_XATTR
#define __USE_KERNEL_XATTR_DEFS
-#define XATTR_CREATE 0x1 /* set value, fail if attr already exists */
-#define XATTR_REPLACE 0x2 /* set value, fail if attr does not exist */
+#define XATTR_CREATE 0x1 /* set value, fail if attr already exists */
+#define XATTR_REPLACE 0x2 /* set value, fail if attr does not exist */
+#ifdef __KERNEL__ /* following is kernel internal, colocated for maintenance */
+#define XATTR_NOSECURITY 0x4 /* get value, do not involve security check */
+#endif
#endif
/* Namespaces */
diff --git a/mm/shmem.c b/mm/shmem.c
index b2db4ed0fbc7..5907c3a67574 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -3209,7 +3209,8 @@ static int shmem_initxattrs(struct inode *inode,
static int shmem_xattr_handler_get(const struct xattr_handler *handler,
struct dentry *unused, struct inode *inode,
- const char *name, void *buffer, size_t size)
+ const char *name, void *buffer, size_t size,
+ int flags)
{
struct shmem_inode_info *info = SHMEM_I(inode);
diff --git a/net/socket.c b/net/socket.c
index 84a8049c2b09..29fd3b2a1fae 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -314,7 +314,8 @@ static const struct dentry_operations sockfs_dentry_operations = {
static int sockfs_xattr_get(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
- const char *suffix, void *value, size_t size)
+ const char *suffix, void *value, size_t size,
+ int flags)
{
if (value) {
if (dentry->d_name.len + 1 > size)
diff --git a/security/commoncap.c b/security/commoncap.c
index 1c519c875217..660d3d41aed8 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -297,7 +297,8 @@ int cap_inode_need_killpriv(struct dentry *dentry)
struct inode *inode = d_backing_inode(dentry);
int error;
- error = __vfs_getxattr(dentry, inode, XATTR_NAME_CAPS, NULL, 0);
+ error = __vfs_getxattr(&init_user_ns, dentry, inode, XATTR_NAME_CAPS,
+ NULL, 0, XATTR_NOSECURITY);
return error > 0;
}
@@ -660,8 +661,9 @@ int get_vfs_caps_from_disk(struct user_namespace *mnt_userns,
return -ENODATA;
fs_ns = inode->i_sb->s_user_ns;
- size = __vfs_getxattr((struct dentry *)dentry, inode,
- XATTR_NAME_CAPS, &data, XATTR_CAPS_SZ);
+ size = __vfs_getxattr(&init_user_ns, (struct dentry *)dentry, inode,
+ XATTR_NAME_CAPS, &data, XATTR_CAPS_SZ,
+ XATTR_NOSECURITY);
if (size == -ENODATA || size == -EOPNOTSUPP)
/* no data, that's ok */
return -ENODATA;
diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c
index 0de367aaa2d3..59e88fb378c6 100644
--- a/security/integrity/evm/evm_main.c
+++ b/security/integrity/evm/evm_main.c
@@ -101,7 +101,9 @@ static int evm_find_protected_xattrs(struct dentry *dentry)
return -EOPNOTSUPP;
list_for_each_entry_lockless(xattr, &evm_config_xattrnames, list) {
- error = __vfs_getxattr(dentry, inode, xattr->name, NULL, 0);
+ error = __vfs_getxattr(&init_user_ns, dentry, inode,
+ xattr->name, NULL, 0,
+ XATTR_NOSECURITY);
if (error < 0) {
if (error == -ENODATA)
continue;
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index ddd097790d47..1f29b4d43914 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -505,7 +505,8 @@ static int sb_check_xattr_support(struct super_block *sb)
goto fallback;
}
- rc = __vfs_getxattr(root, root_inode, XATTR_NAME_SELINUX, NULL, 0);
+ rc = __vfs_getxattr(&init_user_ns, root, root_inode,
+ XATTR_NAME_SELINUX, NULL, 0, XATTR_NOSECURITY);
if (rc < 0 && rc != -ENODATA) {
if (rc == -EOPNOTSUPP) {
pr_warn("SELinux: (dev %s, type %s) has no security xattr handler\n",
@@ -1360,12 +1361,16 @@ static int inode_doinit_use_xattr(struct inode *inode, struct dentry *dentry,
return -ENOMEM;
context[len] = '\0';
- rc = __vfs_getxattr(dentry, inode, XATTR_NAME_SELINUX, context, len);
+ rc = __vfs_getxattr(&init_user_ns, dentry, inode,
+ XATTR_NAME_SELINUX, context, len,
+ XATTR_NOSECURITY);
if (rc == -ERANGE) {
kfree(context);
/* Need a larger buffer. Query for the right size. */
- rc = __vfs_getxattr(dentry, inode, XATTR_NAME_SELINUX, NULL, 0);
+ rc = __vfs_getxattr(&init_user_ns, dentry, inode,
+ XATTR_NAME_SELINUX, NULL, 0,
+ XATTR_NOSECURITY);
if (rc < 0)
return rc;
@@ -1375,8 +1380,9 @@ static int inode_doinit_use_xattr(struct inode *inode, struct dentry *dentry,
return -ENOMEM;
context[len] = '\0';
- rc = __vfs_getxattr(dentry, inode, XATTR_NAME_SELINUX,
- context, len);
+ rc = __vfs_getxattr(&init_user_ns, dentry, inode,
+ XATTR_NAME_SELINUX, context, len,
+ XATTR_NOSECURITY);
}
if (rc < 0) {
kfree(context);
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 12a45e61c1a5..ed0693643166 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -289,7 +289,8 @@ static struct smack_known *smk_fetch(const char *name, struct inode *ip,
if (buffer == NULL)
return ERR_PTR(-ENOMEM);
- rc = __vfs_getxattr(dp, ip, name, buffer, SMK_LONGLABEL);
+ rc = __vfs_getxattr(&init_user_ns, dp, ip, name, buffer, SMK_LONGLABEL,
+ XATTR_NOSECURITY);
if (rc < 0)
skp = ERR_PTR(rc);
else if (rc == 0)
@@ -3432,9 +3433,9 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
TRANS_TRUE, TRANS_TRUE_SIZE,
0);
} else {
- rc = __vfs_getxattr(dp, inode,
+ rc = __vfs_getxattr(&init_user_ns, dp, inode,
XATTR_NAME_SMACKTRANSMUTE, trattr,
- TRANS_TRUE_SIZE);
+ TRANS_TRUE_SIZE, XATTR_NOSECURITY);
if (rc >= 0 && strncmp(trattr, TRANS_TRUE,
TRANS_TRUE_SIZE) != 0)
rc = -EINVAL;
--
2.17.1