diff options
72 files changed, 238 insertions, 85 deletions
diff --git a/Documentation/filesystems/locking.rst b/Documentation/filesystems/locking.rst index c0f2c7586531..b7dcc86c92a4 100644 --- a/Documentation/filesystems/locking.rst +++ b/Documentation/filesystems/locking.rst @@ -126,9 +126,10 @@ prototypes:: 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 *handler, struct dentry *dentry, - struct inode *inode, const char *name, const void *buffer, - 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); locking rules: all may block diff --git a/Documentation/filesystems/porting.rst b/Documentation/filesystems/porting.rst index 867036aa90b8..de1dcec3b5b8 100644 --- a/Documentation/filesystems/porting.rst +++ b/Documentation/filesystems/porting.rst @@ -717,6 +717,8 @@ be removed. Switch while you still can; the old one won't stay. **mandatory** ->setxattr() and xattr_handler.set() get dentry and inode passed separately. +The xattr_handler.set() gets passed the user namespace of the mount the inode +is seen from so filesystems can idmap the i_uid and i_gid accordingly. dentry might be yet to be attached to inode, so do _not_ use its ->d_inode in the instances. Rationale: !@#!@# security_d_instantiate() needs to be called before we attach dentry to inode and !@#!@##!@$!$#!@#$!@$!@$ smack diff --git a/fs/9p/acl.c b/fs/9p/acl.c index d77b28e8d57a..1c14f18a6ec9 100644 --- a/fs/9p/acl.c +++ b/fs/9p/acl.c @@ -239,6 +239,7 @@ static int v9fs_xattr_get_acl(const struct xattr_handler *handler, } static int v9fs_xattr_set_acl(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *dentry, struct inode *inode, const char *name, const void *value, size_t size, int flags) @@ -279,7 +280,8 @@ static int v9fs_xattr_set_acl(const struct xattr_handler *handler, struct iattr iattr = { 0 }; struct posix_acl *old_acl = acl; - retval = posix_acl_update_mode(inode, &iattr.ia_mode, &acl); + retval = posix_acl_update_mode(mnt_userns, inode, + &iattr.ia_mode, &acl); if (retval) goto err_out; if (!acl) { diff --git a/fs/9p/xattr.c b/fs/9p/xattr.c index 87217dd0433e..ee331845e2c7 100644 --- a/fs/9p/xattr.c +++ b/fs/9p/xattr.c @@ -157,6 +157,7 @@ static int v9fs_xattr_handler_get(const struct xattr_handler *handler, } static int v9fs_xattr_handler_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *dentry, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/afs/xattr.c b/fs/afs/xattr.c index 95c573dcda11..c629caae5002 100644 --- a/fs/afs/xattr.c +++ b/fs/afs/xattr.c @@ -120,6 +120,7 @@ static const struct afs_operation_ops afs_store_acl_operation = { * Set a file's AFS3 ACL. */ static int afs_xattr_set_acl(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) @@ -248,6 +249,7 @@ static const struct afs_operation_ops yfs_store_opaque_acl2_operation = { * Set a file's YFS ACL. */ static int afs_xattr_set_yfs(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) diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c index a0af1b952c4d..d12a5a8730a8 100644 --- a/fs/btrfs/acl.c +++ b/fs/btrfs/acl.c @@ -113,7 +113,8 @@ int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type) umode_t old_mode = inode->i_mode; if (type == ACL_TYPE_ACCESS && acl) { - ret = posix_acl_update_mode(inode, &inode->i_mode, &acl); + ret = posix_acl_update_mode(&init_user_ns, inode, + &inode->i_mode, &acl); if (ret) return ret; } diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 792191a8705b..6c18fb1a25af 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -5070,7 +5070,8 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr) err = btrfs_dirty_inode(inode); if (!err && attr->ia_valid & ATTR_MODE) - err = posix_acl_chmod(inode, inode->i_mode); + err = posix_acl_chmod(&init_user_ns, inode, + inode->i_mode); } return err; diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c index af6246f36a9e..b025102e435f 100644 --- a/fs/btrfs/xattr.c +++ b/fs/btrfs/xattr.c @@ -362,6 +362,7 @@ static int btrfs_xattr_handler_get(const struct xattr_handler *handler, } static int btrfs_xattr_handler_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *buffer, size_t size, int flags) @@ -371,6 +372,7 @@ static int btrfs_xattr_handler_set(const struct xattr_handler *handler, } static int btrfs_xattr_handler_set_prop(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/ceph/acl.c b/fs/ceph/acl.c index e0465741c591..52a01ddbc4ac 100644 --- a/fs/ceph/acl.c +++ b/fs/ceph/acl.c @@ -100,7 +100,8 @@ int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type) case ACL_TYPE_ACCESS: name = XATTR_NAME_POSIX_ACL_ACCESS; if (acl) { - ret = posix_acl_update_mode(inode, &new_mode, &acl); + ret = posix_acl_update_mode(&init_user_ns, inode, + &new_mode, &acl); if (ret) goto out; } diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 285d3baca27e..145e26a4ddbb 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -2262,7 +2262,7 @@ int ceph_setattr(struct dentry *dentry, struct iattr *attr) err = __ceph_setattr(inode, attr); if (err >= 0 && (attr->ia_valid & ATTR_MODE)) - err = posix_acl_chmod(inode, attr->ia_mode); + err = posix_acl_chmod(&init_user_ns, inode, attr->ia_mode); return err; } diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c index 24997982de01..02f59bcb4f27 100644 --- a/fs/ceph/xattr.c +++ b/fs/ceph/xattr.c @@ -1238,6 +1238,7 @@ static int ceph_get_xattr_handler(const struct xattr_handler *handler, } static int ceph_set_xattr_handler(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c index 6b658a1172ef..41a611e76bb7 100644 --- a/fs/cifs/xattr.c +++ b/fs/cifs/xattr.c @@ -101,6 +101,7 @@ static int cifs_creation_time_set(unsigned int xid, struct cifs_tcon *pTcon, } static int cifs_xattr_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *dentry, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c index d3ea0c57b075..ac6472a82567 100644 --- a/fs/ecryptfs/inode.c +++ b/fs/ecryptfs/inode.c @@ -1133,6 +1133,7 @@ static int ecryptfs_xattr_get(const struct xattr_handler *handler, } static int ecryptfs_xattr_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *dentry, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c index cf4c77f8dd08..9031f7df2d48 100644 --- a/fs/ext2/acl.c +++ b/fs/ext2/acl.c @@ -223,7 +223,8 @@ ext2_set_acl(struct inode *inode, struct posix_acl *acl, int type) umode_t mode = inode->i_mode; if (type == ACL_TYPE_ACCESS && acl) { - error = posix_acl_update_mode(inode, &mode, &acl); + error = posix_acl_update_mode(&init_user_ns, inode, &mode, + &acl); if (error) return error; update_mode = 1; diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index 06c0cf28c1a0..9de813635d8d 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -1691,7 +1691,7 @@ int ext2_setattr(struct dentry *dentry, struct iattr *iattr) } setattr_copy(&init_user_ns, inode, iattr); if (iattr->ia_valid & ATTR_MODE) - error = posix_acl_chmod(inode, inode->i_mode); + error = posix_acl_chmod(&init_user_ns, inode, inode->i_mode); mark_inode_dirty(inode); return error; diff --git a/fs/ext2/xattr_security.c b/fs/ext2/xattr_security.c index 9a682e440acb..ebade1f52451 100644 --- a/fs/ext2/xattr_security.c +++ b/fs/ext2/xattr_security.c @@ -19,6 +19,7 @@ ext2_xattr_security_get(const struct xattr_handler *handler, static int ext2_xattr_security_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/ext2/xattr_trusted.c b/fs/ext2/xattr_trusted.c index 49add1107850..18a87d5dd1ab 100644 --- a/fs/ext2/xattr_trusted.c +++ b/fs/ext2/xattr_trusted.c @@ -26,6 +26,7 @@ ext2_xattr_trusted_get(const struct xattr_handler *handler, static int ext2_xattr_trusted_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/ext2/xattr_user.c b/fs/ext2/xattr_user.c index c243a3b4d69d..58092449f8ff 100644 --- a/fs/ext2/xattr_user.c +++ b/fs/ext2/xattr_user.c @@ -30,6 +30,7 @@ ext2_xattr_user_get(const struct xattr_handler *handler, static int ext2_xattr_user_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c index 68aaed48315f..7b0fb66bc04d 100644 --- a/fs/ext4/acl.c +++ b/fs/ext4/acl.c @@ -245,7 +245,8 @@ retry: ext4_fc_start_update(inode); if ((type == ACL_TYPE_ACCESS) && acl) { - error = posix_acl_update_mode(inode, &mode, &acl); + error = posix_acl_update_mode(&init_user_ns, inode, &mode, + &acl); if (error) goto out_stop; if (mode != inode->i_mode) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 8edfa3e226e6..24ea5851e90a 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5524,7 +5524,7 @@ out_mmap_sem: ext4_orphan_del(NULL, inode); if (!error && (ia_valid & ATTR_MODE)) - rc = posix_acl_chmod(inode, inode->i_mode); + rc = posix_acl_chmod(&init_user_ns, inode, inode->i_mode); err_out: if (error) diff --git a/fs/ext4/xattr_hurd.c b/fs/ext4/xattr_hurd.c index 8cfa74a56361..c78df5790377 100644 --- a/fs/ext4/xattr_hurd.c +++ b/fs/ext4/xattr_hurd.c @@ -32,6 +32,7 @@ ext4_xattr_hurd_get(const struct xattr_handler *handler, static int ext4_xattr_hurd_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/ext4/xattr_security.c b/fs/ext4/xattr_security.c index 197a9d8a15ef..8213f66f7b2d 100644 --- a/fs/ext4/xattr_security.c +++ b/fs/ext4/xattr_security.c @@ -23,6 +23,7 @@ ext4_xattr_security_get(const struct xattr_handler *handler, static int ext4_xattr_security_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/ext4/xattr_trusted.c b/fs/ext4/xattr_trusted.c index e9389e5d75c3..7c21ffb26d25 100644 --- a/fs/ext4/xattr_trusted.c +++ b/fs/ext4/xattr_trusted.c @@ -30,6 +30,7 @@ ext4_xattr_trusted_get(const struct xattr_handler *handler, static int ext4_xattr_trusted_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/ext4/xattr_user.c b/fs/ext4/xattr_user.c index d4546184b34b..2fe7ff0a479c 100644 --- a/fs/ext4/xattr_user.c +++ b/fs/ext4/xattr_user.c @@ -31,6 +31,7 @@ ext4_xattr_user_get(const struct xattr_handler *handler, static int ext4_xattr_user_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/f2fs/acl.c b/fs/f2fs/acl.c index 1e5e9b1136ee..6a95bf28f602 100644 --- a/fs/f2fs/acl.c +++ b/fs/f2fs/acl.c @@ -213,7 +213,8 @@ static int __f2fs_set_acl(struct inode *inode, int type, case ACL_TYPE_ACCESS: name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS; if (acl && !ipage) { - error = posix_acl_update_mode(inode, &mode, &acl); + error = posix_acl_update_mode(&init_user_ns, inode, + &mode, &acl); if (error) return error; set_acl_inode(inode, mode); diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 90d7b89176de..6ccdfe0606d9 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -831,8 +831,8 @@ int f2fs_getattr(const struct path *path, struct kstat *stat, } #ifdef CONFIG_F2FS_FS_POSIX_ACL -static void __setattr_copy(struct user_namespace *mnt_userns, struct inode *inode, - const struct iattr *attr) +static void __setattr_copy(struct user_namespace *mnt_userns, + struct inode *inode, const struct iattr *attr) { unsigned int ia_valid = attr->ia_valid; @@ -950,7 +950,8 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr) __setattr_copy(&init_user_ns, inode, attr); if (attr->ia_valid & ATTR_MODE) { - err = posix_acl_chmod(inode, f2fs_get_inode_mode(inode)); + err = posix_acl_chmod(&init_user_ns, inode, + f2fs_get_inode_mode(inode)); if (err || is_inode_flag_set(inode, FI_ACL_MODE)) { inode->i_mode = F2FS_I(inode)->i_acl_mode; clear_inode_flag(inode, FI_ACL_MODE); diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c index d772bf13a814..10081bf74324 100644 --- a/fs/f2fs/xattr.c +++ b/fs/f2fs/xattr.c @@ -64,6 +64,7 @@ static int f2fs_xattr_generic_get(const struct xattr_handler *handler, } static int f2fs_xattr_generic_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) @@ -107,6 +108,7 @@ static int f2fs_xattr_advise_get(const struct xattr_handler *handler, } static int f2fs_xattr_advise_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/fuse/xattr.c b/fs/fuse/xattr.c index cdea18de94f7..1a7d7ace54e1 100644 --- a/fs/fuse/xattr.c +++ b/fs/fuse/xattr.c @@ -188,6 +188,7 @@ static int fuse_xattr_get(const struct xattr_handler *handler, } static int fuse_xattr_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *dentry, struct inode *inode, const char *name, const void *value, size_t size, int flags) @@ -214,6 +215,7 @@ static int no_xattr_get(const struct xattr_handler *handler, } static int no_xattr_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *dentry, struct inode *nodee, const char *name, const void *value, size_t size, int flags) diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c index 2e939f5fe751..ce88ef29eef0 100644 --- a/fs/gfs2/acl.c +++ b/fs/gfs2/acl.c @@ -130,7 +130,7 @@ int gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type) mode = inode->i_mode; if (type == ACL_TYPE_ACCESS && acl) { - ret = posix_acl_update_mode(inode, &mode, &acl); + ret = posix_acl_update_mode(&init_user_ns, inode, &mode, &acl); if (ret) goto unlock; } diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c index 59c25181d108..728405d15a05 100644 --- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -1993,7 +1993,8 @@ static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) else { error = gfs2_setattr_simple(inode, attr); if (!error && attr->ia_valid & ATTR_MODE) - error = posix_acl_chmod(inode, inode->i_mode); + error = posix_acl_chmod(&init_user_ns, inode, + inode->i_mode); } error: diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c index 9d7667bc4292..13969a813410 100644 --- a/fs/gfs2/xattr.c +++ b/fs/gfs2/xattr.c @@ -1214,6 +1214,7 @@ int __gfs2_xattr_set(struct inode *inode, const char *name, } static int gfs2_xattr_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/hfs/attr.c b/fs/hfs/attr.c index 74fa62643136..2bd54efaf416 100644 --- a/fs/hfs/attr.c +++ b/fs/hfs/attr.c @@ -121,6 +121,7 @@ static int hfs_xattr_get(const struct xattr_handler *handler, } static int hfs_xattr_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/hfsplus/xattr.c b/fs/hfsplus/xattr.c index bb0b27d88e50..4d169c5a2673 100644 --- a/fs/hfsplus/xattr.c +++ b/fs/hfsplus/xattr.c @@ -858,6 +858,7 @@ static int hfsplus_osx_getxattr(const struct xattr_handler *handler, } static int hfsplus_osx_setxattr(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *buffer, size_t size, int flags) diff --git a/fs/hfsplus/xattr_security.c b/fs/hfsplus/xattr_security.c index cfbe6a3bfb1e..c1c7a16cbf21 100644 --- a/fs/hfsplus/xattr_security.c +++ b/fs/hfsplus/xattr_security.c @@ -23,6 +23,7 @@ static int hfsplus_security_getxattr(const struct xattr_handler *handler, } static int hfsplus_security_setxattr(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *buffer, size_t size, int flags) diff --git a/fs/hfsplus/xattr_trusted.c b/fs/hfsplus/xattr_trusted.c index fbad91e1dada..e150372ec564 100644 --- a/fs/hfsplus/xattr_trusted.c +++ b/fs/hfsplus/xattr_trusted.c @@ -22,6 +22,7 @@ static int hfsplus_trusted_getxattr(const struct xattr_handler *handler, } static int hfsplus_trusted_setxattr(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *buffer, size_t size, int flags) diff --git a/fs/hfsplus/xattr_user.c b/fs/hfsplus/xattr_user.c index 74d19faf255e..a6b60b153916 100644 --- a/fs/hfsplus/xattr_user.c +++ b/fs/hfsplus/xattr_user.c @@ -22,6 +22,7 @@ static int hfsplus_user_getxattr(const struct xattr_handler *handler, } static int hfsplus_user_setxattr(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *buffer, size_t size, int flags) diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c index 093ffbd82395..5f27ac593479 100644 --- a/fs/jffs2/acl.c +++ b/fs/jffs2/acl.c @@ -236,7 +236,8 @@ int jffs2_set_acl(struct inode *inode, struct posix_acl *acl, int type) if (acl) { umode_t mode; - rc = posix_acl_update_mode(inode, &mode, &acl); + rc = posix_acl_update_mode(&init_user_ns, inode, &mode, + &acl); if (rc) return rc; if (inode->i_mode != mode) { diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c index 67993808f4da..ee9f51bab4c6 100644 --- a/fs/jffs2/fs.c +++ b/fs/jffs2/fs.c @@ -201,7 +201,7 @@ int jffs2_setattr(struct dentry *dentry, struct iattr *iattr) rc = jffs2_do_setattr(inode, iattr); if (!rc && (iattr->ia_valid & ATTR_MODE)) - rc = posix_acl_chmod(inode, inode->i_mode); + rc = posix_acl_chmod(&init_user_ns, inode, inode->i_mode); return rc; } diff --git a/fs/jffs2/security.c b/fs/jffs2/security.c index c2332e30f218..aef5522551db 100644 --- a/fs/jffs2/security.c +++ b/fs/jffs2/security.c @@ -57,6 +57,7 @@ static int jffs2_security_getxattr(const struct xattr_handler *handler, } static int jffs2_security_setxattr(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *buffer, size_t size, int flags) diff --git a/fs/jffs2/xattr_trusted.c b/fs/jffs2/xattr_trusted.c index 5d6030826c52..cc3f24883e7d 100644 --- a/fs/jffs2/xattr_trusted.c +++ b/fs/jffs2/xattr_trusted.c @@ -25,6 +25,7 @@ static int jffs2_trusted_getxattr(const struct xattr_handler *handler, } static int jffs2_trusted_setxattr(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *buffer, size_t size, int flags) diff --git a/fs/jffs2/xattr_user.c b/fs/jffs2/xattr_user.c index 9d027b4abcf9..fb945977c013 100644 --- a/fs/jffs2/xattr_user.c +++ b/fs/jffs2/xattr_user.c @@ -25,6 +25,7 @@ static int jffs2_user_getxattr(const struct xattr_handler *handler, } static int jffs2_user_setxattr(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *buffer, size_t size, int flags) diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c index 92cc0ac2d1fc..cf79a34bfada 100644 --- a/fs/jfs/acl.c +++ b/fs/jfs/acl.c @@ -101,7 +101,7 @@ int jfs_set_acl(struct inode *inode, struct posix_acl *acl, int type) tid = txBegin(inode->i_sb, 0); mutex_lock(&JFS_IP(inode)->commit_mutex); if (type == ACL_TYPE_ACCESS && acl) { - rc = posix_acl_update_mode(inode, &mode, &acl); + rc = posix_acl_update_mode(&init_user_ns, inode, &mode, &acl); if (rc) goto end_tx; if (mode != inode->i_mode) diff --git a/fs/jfs/file.c b/fs/jfs/file.c index ff49876e9c9b..61c3b0c1fbf6 100644 --- a/fs/jfs/file.c +++ b/fs/jfs/file.c @@ -122,7 +122,7 @@ int jfs_setattr(struct dentry *dentry, struct iattr *iattr) mark_inode_dirty(inode); if (iattr->ia_valid & ATTR_MODE) - rc = posix_acl_chmod(inode, inode->i_mode); + rc = posix_acl_chmod(&init_user_ns, inode, inode->i_mode); return rc; } diff --git a/fs/jfs/xattr.c b/fs/jfs/xattr.c index db41e7803163..f9273f6901c8 100644 --- a/fs/jfs/xattr.c +++ b/fs/jfs/xattr.c @@ -932,6 +932,7 @@ static int jfs_xattr_get(const struct xattr_handler *handler, } static int jfs_xattr_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) @@ -950,6 +951,7 @@ static int jfs_xattr_get_os2(const struct xattr_handler *handler, } static int jfs_xattr_set_os2(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c index 86bd4c593b78..7e44052b42e1 100644 --- a/fs/kernfs/inode.c +++ b/fs/kernfs/inode.c @@ -319,6 +319,7 @@ static int kernfs_vfs_xattr_get(const struct xattr_handler *handler, } static int kernfs_vfs_xattr_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *suffix, const void *value, size_t size, int flags) @@ -385,6 +386,7 @@ static int kernfs_vfs_user_xattr_rm(struct kernfs_node *kn, } static int kernfs_vfs_user_xattr_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *suffix, const void *value, size_t size, int flags) diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 2f4679a62712..a07530cf673d 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -7491,6 +7491,7 @@ nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *key, const void *buf, size_t buflen, int flags) @@ -7513,6 +7514,7 @@ static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) #ifdef CONFIG_NFS_V4_SECURITY_LABEL static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *key, const void *buf, size_t buflen, int flags) @@ -7563,6 +7565,7 @@ nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) #ifdef CONFIG_NFS_V4_2 static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *key, const void *buf, size_t buflen, int flags) diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c index b0f66604532a..b83f222558e3 100644 --- a/fs/nfsd/nfs2acl.c +++ b/fs/nfsd/nfs2acl.c @@ -113,10 +113,12 @@ static __be32 nfsacld_proc_setacl(struct svc_rqst *rqstp) fh_lock(fh); - error = set_posix_acl(inode, ACL_TYPE_ACCESS, argp->acl_access); + error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_ACCESS, + argp->acl_access); if (error) goto out_drop_lock; - error = set_posix_acl(inode, ACL_TYPE_DEFAULT, argp->acl_default); + error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_DEFAULT, + argp->acl_default); if (error) goto out_drop_lock; diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c index 7c30876a31a1..f18ec7e8094d 100644 --- a/fs/nfsd/nfs3acl.c +++ b/fs/nfsd/nfs3acl.c @@ -103,10 +103,12 @@ static __be32 nfsd3_proc_setacl(struct svc_rqst *rqstp) fh_lock(fh); - error = set_posix_acl(inode, ACL_TYPE_ACCESS, argp->acl_access); + error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_ACCESS, + argp->acl_access); if (error) goto out_drop_lock; - error = set_posix_acl(inode, ACL_TYPE_DEFAULT, argp->acl_default); + error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_DEFAULT, + argp->acl_default); out_drop_lock: fh_unlock(fh); diff --git a/fs/nfsd/nfs4acl.c b/fs/nfsd/nfs4acl.c index 71292a0d6f09..eaa3a0cf38f1 100644 --- a/fs/nfsd/nfs4acl.c +++ b/fs/nfsd/nfs4acl.c @@ -781,12 +781,13 @@ nfsd4_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, fh_lock(fhp); - host_error = set_posix_acl(inode, ACL_TYPE_ACCESS, pacl); + host_error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_ACCESS, pacl); if (host_error < 0) goto out_drop_lock; if (S_ISDIR(inode->i_mode)) { - host_error = set_posix_acl(inode, ACL_TYPE_DEFAULT, dpacl); + host_error = set_posix_acl(&init_user_ns, inode, + ACL_TYPE_DEFAULT, dpacl); } out_drop_lock: diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c index 7b07f5df3a29..990756cee4bd 100644 --- a/fs/ocfs2/acl.c +++ b/fs/ocfs2/acl.c @@ -274,7 +274,8 @@ int ocfs2_iop_set_acl(struct inode *inode, struct posix_acl *acl, int type) if (type == ACL_TYPE_ACCESS && acl) { umode_t mode; - status = posix_acl_update_mode(inode, &mode, &acl); + status = posix_acl_update_mode(&init_user_ns, inode, &mode, + &acl); if (status) goto unlock; diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c index 9ccd19d8f7b1..36ae47a4aef6 100644 --- a/fs/ocfs2/xattr.c +++ b/fs/ocfs2/xattr.c @@ -7249,6 +7249,7 @@ static int ocfs2_xattr_security_get(const struct xattr_handler *handler, } static int ocfs2_xattr_security_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) @@ -7321,6 +7322,7 @@ static int ocfs2_xattr_trusted_get(const struct xattr_handler *handler, } static int ocfs2_xattr_trusted_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) @@ -7351,6 +7353,7 @@ static int ocfs2_xattr_user_get(const struct xattr_handler *handler, } static int ocfs2_xattr_user_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/orangefs/acl.c b/fs/orangefs/acl.c index a25e6c890975..628921952d16 100644 --- a/fs/orangefs/acl.c +++ b/fs/orangefs/acl.c @@ -132,7 +132,8 @@ int orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type) * and "mode" to the new desired value. It is up to * us to propagate the new mode back to the server... */ - error = posix_acl_update_mode(inode, &iattr.ia_mode, &acl); + error = posix_acl_update_mode(&init_user_ns, inode, + &iattr.ia_mode, &acl); if (error) { gossip_err("%s: posix_acl_update_mode err: %d\n", __func__, diff --git a/fs/orangefs/inode.c b/fs/orangefs/inode.c index 8ac9491ceb9a..563fe9ab8eb2 100644 --- a/fs/orangefs/inode.c +++ b/fs/orangefs/inode.c @@ -861,7 +861,7 @@ again: if (iattr->ia_valid & ATTR_MODE) /* change mod on a file that has ACLs */ - ret = posix_acl_chmod(inode, inode->i_mode); + ret = posix_acl_chmod(&init_user_ns, inode, inode->i_mode); ret = 0; out: diff --git a/fs/orangefs/xattr.c b/fs/orangefs/xattr.c index bdc285aea360..9a5b757fbd2f 100644 --- a/fs/orangefs/xattr.c +++ b/fs/orangefs/xattr.c @@ -526,6 +526,7 @@ out_unlock: } static int orangefs_xattr_set_default(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index 39b2e9aa0e5b..e24c995c5fd4 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -980,6 +980,7 @@ ovl_posix_acl_xattr_get(const struct xattr_handler *handler, static int __maybe_unused ovl_posix_acl_xattr_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *dentry, struct inode *inode, const char *name, const void *value, size_t size, int flags) @@ -1044,6 +1045,7 @@ static int ovl_own_xattr_get(const struct xattr_handler *handler, } static int ovl_own_xattr_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *dentry, struct inode *inode, const char *name, const void *value, size_t size, int flags) @@ -1059,6 +1061,7 @@ static int ovl_other_xattr_get(const struct xattr_handler *handler, } static int ovl_other_xattr_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *dentry, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/posix_acl.c b/fs/posix_acl.c index 9ce8214bfdac..d31b60f5d40d 100644 --- a/fs/posix_acl.c +++ b/fs/posix_acl.c @@ -558,8 +558,22 @@ __posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, umode_t mode) } EXPORT_SYMBOL(__posix_acl_chmod); +/** + * posix_acl_chmod - chmod a posix acl + * + * @mnt_userns: user namespace of the mount @inode was found from + * @inode: inode to check permissions on + * @mode: the new mode of @inode + * + * If the inode has been found through an idmapped mount the user namespace of + * the vfsmount must be passed through @mnt_userns. This function will then + * take care to map the inode according to @mnt_userns before checking + * permissions. On non-idmapped mounts or if permission checking is to be + * performed on the raw inode simply passs init_user_ns. + */ int -posix_acl_chmod(struct inode *inode, umode_t mode) + posix_acl_chmod(struct user_namespace *mnt_userns, struct inode *inode, + umode_t mode) { struct posix_acl *acl; int ret = 0; @@ -638,9 +652,10 @@ EXPORT_SYMBOL_GPL(posix_acl_create); /** * posix_acl_update_mode - update mode in set_acl - * @inode: target inode - * @mode_p: mode (pointer) for update - * @acl: acl pointer + * @mnt_userns: user namespace of the mount @inode was found from + * @inode: target inode + * @mode_p: mode (pointer) for update + * @acl: acl pointer * * Update the file mode when setting an ACL: compute the new file permission * bits based on the ACL. In addition, if the ACL is equivalent to the new @@ -649,9 +664,16 @@ EXPORT_SYMBOL_GPL(posix_acl_create); * As with chmod, clear the setgid bit if the caller is not in the owning group * or capable of CAP_FSETID (see inode_change_ok). * + * If the inode has been found through an idmapped mount the user namespace of + * the vfsmount must be passed through @mnt_userns. This function will then + * take care to map the inode according to @mnt_userns before checking + * permissions. On non-idmapped mounts or if permission checking is to be + * performed on the raw inode simply passs init_user_ns. + * * Called from set_acl inode operations. */ -int posix_acl_update_mode(struct inode *inode, umode_t *mode_p, +int posix_acl_update_mode(struct user_namespace *mnt_userns, + struct inode *inode, umode_t *mode_p, struct posix_acl **acl) { umode_t mode = inode->i_mode; @@ -662,8 +684,8 @@ int posix_acl_update_mode(struct inode *inode, umode_t *mode_p, return error; if (error == 0) *acl = NULL; - if (!in_group_p(inode->i_gid) && - !capable_wrt_inode_uidgid(&init_user_ns, inode, CAP_FSETID)) + if (!in_group_p(i_gid_into_mnt(mnt_userns, inode)) && + !capable_wrt_inode_uidgid(mnt_userns, inode, CAP_FSETID)) mode &= ~S_ISGID; *mode_p = mode; return 0; @@ -675,7 +697,8 @@ EXPORT_SYMBOL(posix_acl_update_mode); */ static void posix_acl_fix_xattr_userns( struct user_namespace *to, struct user_namespace *from, - void *value, size_t size) + struct user_namespace *mnt_userns, + void *value, size_t size, bool from_user) { struct posix_acl_xattr_header *header = value; struct posix_acl_xattr_entry *entry = (void *)(header + 1), *end; @@ -700,10 +723,18 @@ static void posix_acl_fix_xattr_userns( switch(le16_to_cpu(entry->e_tag)) { case ACL_USER: uid = make_kuid(from, le32_to_cpu(entry->e_id)); + if (from_user) + uid = kuid_from_mnt(mnt_userns, uid); + else + uid = kuid_into_mnt(mnt_userns, uid); entry->e_id = cpu_to_le32(from_kuid(to, uid)); break; case ACL_GROUP: gid = make_kgid(from, le32_to_cpu(entry->e_id)); + if (from_user) + gid = kgid_from_mnt(mnt_userns, gid); + else + gid = kgid_into_mnt(mnt_userns, gid); entry->e_id = cpu_to_le32(from_kgid(to, gid)); break; default: @@ -712,20 +743,24 @@ static void posix_acl_fix_xattr_userns( } } -void posix_acl_fix_xattr_from_user(void *value, size_t size) +void posix_acl_fix_xattr_from_user(struct user_namespace *mnt_userns, + void *value, size_t size) { struct user_namespace *user_ns = current_user_ns(); - if (user_ns == &init_user_ns) + if ((user_ns == &init_user_ns) && (mnt_userns == &init_user_ns)) return; - posix_acl_fix_xattr_userns(&init_user_ns, user_ns, value, size); + posix_acl_fix_xattr_userns(&init_user_ns, user_ns, mnt_userns, value, + size, true); } -void posix_acl_fix_xattr_to_user(void *value, size_t size) +void posix_acl_fix_xattr_to_user(struct user_namespace *mnt_userns, + void *value, size_t size) { struct user_namespace *user_ns = current_user_ns(); - if (user_ns == &init_user_ns) + if ((user_ns == &init_user_ns) && (mnt_userns == &init_user_ns)) return; - posix_acl_fix_xattr_userns(user_ns, &init_user_ns, value, size); + posix_acl_fix_xattr_userns(user_ns, &init_user_ns, mnt_userns, value, + size, false); } /* @@ -865,7 +900,8 @@ posix_acl_xattr_get(const struct xattr_handler *handler, } int -set_posix_acl(struct inode *inode, int type, struct posix_acl *acl) +set_posix_acl(struct user_namespace *mnt_userns, struct inode *inode, + int type, struct posix_acl *acl) { if (!IS_POSIXACL(inode)) return -EOPNOTSUPP; @@ -874,7 +910,7 @@ set_posix_acl(struct inode *inode, int type, struct posix_acl *acl) if (type == ACL_TYPE_DEFAULT && !S_ISDIR(inode->i_mode)) return acl ? -EACCES : 0; - if (!inode_owner_or_capable(&init_user_ns, inode)) + if (!inode_owner_or_capable(mnt_userns, inode)) return -EPERM; if (acl) { @@ -888,9 +924,10 @@ EXPORT_SYMBOL(set_posix_acl); static int posix_acl_xattr_set(const struct xattr_handler *handler, - struct dentry *unused, struct inode *inode, - const char *name, const void *value, - size_t size, int flags) + struct user_namespace *mnt_userns, + struct dentry *unused, struct inode *inode, + const char *name, const void *value, size_t size, + int flags) { struct posix_acl *acl = NULL; int ret; @@ -900,7 +937,7 @@ posix_acl_xattr_set(const struct xattr_handler *handler, if (IS_ERR(acl)) return PTR_ERR(acl); } - ret = set_posix_acl(inode, handler->flags, acl); + ret = set_posix_acl(mnt_userns, inode, handler->flags, acl); posix_acl_release(acl); return ret; } @@ -934,7 +971,7 @@ int simple_set_acl(struct inode *inode, struct posix_acl *acl, int type) int error; if (type == ACL_TYPE_ACCESS) { - error = posix_acl_update_mode(inode, + error = posix_acl_update_mode(&init_user_ns, inode, &inode->i_mode, &acl); if (error) return error; diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c index ccd40df6eb45..4bf976bc7bad 100644 --- a/fs/reiserfs/xattr_acl.c +++ b/fs/reiserfs/xattr_acl.c @@ -40,7 +40,8 @@ reiserfs_set_acl(struct inode *inode, struct posix_acl *acl, int type) reiserfs_write_unlock(inode->i_sb); if (error == 0) { if (type == ACL_TYPE_ACCESS && acl) { - error = posix_acl_update_mode(inode, &mode, &acl); + error = posix_acl_update_mode(&init_user_ns, inode, + &mode, &acl); if (error) goto unlock; update_mode = 1; @@ -399,5 +400,5 @@ int reiserfs_acl_chmod(struct inode *inode) !reiserfs_posixacl(inode->i_sb)) return 0; - return posix_acl_chmod(inode, inode->i_mode); + return posix_acl_chmod(&init_user_ns, inode, inode->i_mode); } diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c index 20be9a0e5870..8965c8e5e172 100644 --- a/fs/reiserfs/xattr_security.c +++ b/fs/reiserfs/xattr_security.c @@ -21,7 +21,8 @@ security_get(const struct xattr_handler *handler, struct dentry *unused, } static int -security_set(const struct xattr_handler *handler, struct dentry *unused, +security_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *buffer, size_t size, int flags) { diff --git a/fs/reiserfs/xattr_trusted.c b/fs/reiserfs/xattr_trusted.c index 5ed48da3d02b..d853cea2afcd 100644 --- a/fs/reiserfs/xattr_trusted.c +++ b/fs/reiserfs/xattr_trusted.c @@ -20,7 +20,8 @@ trusted_get(const struct xattr_handler *handler, struct dentry *unused, } static int -trusted_set(const struct xattr_handler *handler, struct dentry *unused, +trusted_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *buffer, size_t size, int flags) { diff --git a/fs/reiserfs/xattr_user.c b/fs/reiserfs/xattr_user.c index a573ca45bacc..65d9cd10a5ea 100644 --- a/fs/reiserfs/xattr_user.c +++ b/fs/reiserfs/xattr_user.c @@ -18,7 +18,8 @@ user_get(const struct xattr_handler *handler, struct dentry *unused, } static int -user_set(const struct xattr_handler *handler, struct dentry *unused, +user_set(const struct xattr_handler *handler, struct user_namespace *mnt_userns, + struct dentry *unused, struct inode *inode, const char *name, const void *buffer, size_t size, int flags) { diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c index a0b9b349efe6..8f4135c22ab6 100644 --- a/fs/ubifs/xattr.c +++ b/fs/ubifs/xattr.c @@ -681,6 +681,7 @@ static int xattr_get(const struct xattr_handler *handler, } static int xattr_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *dentry, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/fs/xattr.c b/fs/xattr.c index c669922e1bde..d777025121e0 100644 --- a/fs/xattr.c +++ b/fs/xattr.c @@ -175,7 +175,8 @@ __vfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name, return -EOPNOTSUPP; if (size == 0) value = ""; /* empty EA, do not remove */ - return handler->set(handler, dentry, inode, name, value, size, flags); + return handler->set(handler, &init_user_ns, dentry, inode, name, value, + size, flags); } EXPORT_SYMBOL(__vfs_setxattr); @@ -281,7 +282,7 @@ vfs_setxattr(struct dentry *dentry, const char *name, const void *value, int error; if (size && strcmp(name, XATTR_NAME_CAPS) == 0) { - error = cap_convert_nscap(dentry, &value, size); + error = cap_convert_nscap(&init_user_ns, dentry, &value, size); if (error < 0) return error; size = error; @@ -450,7 +451,8 @@ __vfs_removexattr(struct dentry *dentry, const char *name) return PTR_ERR(handler); if (!handler->set) return -EOPNOTSUPP; - return handler->set(handler, dentry, inode, name, NULL, 0, XATTR_REPLACE); + return handler->set(handler, &init_user_ns, dentry, inode, name, NULL, + 0, XATTR_REPLACE); } EXPORT_SYMBOL(__vfs_removexattr); @@ -548,7 +550,8 @@ setxattr(struct dentry *d, const char __user *name, const void __user *value, } if ((strcmp(kname, XATTR_NAME_POSIX_ACL_ACCESS) == 0) || (strcmp(kname, XATTR_NAME_POSIX_ACL_DEFAULT) == 0)) - posix_acl_fix_xattr_from_user(kvalue, size); + posix_acl_fix_xattr_from_user(&init_user_ns, kvalue, + size); } error = vfs_setxattr(d, kname, kvalue, size, flags); @@ -642,7 +645,8 @@ getxattr(struct dentry *d, const char __user *name, void __user *value, if (error > 0) { if ((strcmp(kname, XATTR_NAME_POSIX_ACL_ACCESS) == 0) || (strcmp(kname, XATTR_NAME_POSIX_ACL_DEFAULT) == 0)) - posix_acl_fix_xattr_to_user(kvalue, error); + posix_acl_fix_xattr_to_user(&init_user_ns, kvalue, + error); if (size && copy_to_user(value, kvalue, error)) error = -EFAULT; } else if (error == -ERANGE && size >= XATTR_SIZE_MAX) { diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c index 779cb73b3d00..368351298bd5 100644 --- a/fs/xfs/xfs_acl.c +++ b/fs/xfs/xfs_acl.c @@ -252,7 +252,8 @@ xfs_set_acl(struct inode *inode, struct posix_acl *acl, int type) return error; if (type == ACL_TYPE_ACCESS) { - error = posix_acl_update_mode(inode, &mode, &acl); + error = posix_acl_update_mode(&init_user_ns, inode, &mode, + &acl); if (error) return error; set_mode = true; diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index 08a478d25122..26d22edef741 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -807,7 +807,7 @@ xfs_setattr_nonsize( * Posix ACL code seems to care about this issue either. */ if (mask & ATTR_MODE) { - error = posix_acl_chmod(inode, inode->i_mode); + error = posix_acl_chmod(&init_user_ns, inode, inode->i_mode); if (error) return error; } diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c index bca48b308c02..12be32f66dc1 100644 --- a/fs/xfs/xfs_xattr.c +++ b/fs/xfs/xfs_xattr.c @@ -38,9 +38,10 @@ xfs_xattr_get(const struct xattr_handler *handler, struct dentry *unused, } static int -xfs_xattr_set(const struct xattr_handler *handler, struct dentry *unused, - struct inode *inode, const char *name, const void *value, - size_t size, int flags) +xfs_xattr_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, + struct inode *inode, const char *name, const void *value, + size_t size, int flags) { struct xfs_da_args args = { .dp = XFS_I(inode), diff --git a/include/linux/capability.h b/include/linux/capability.h index 62bfa3ed84d7..da21ef118b04 100644 --- a/include/linux/capability.h +++ b/include/linux/capability.h @@ -273,6 +273,7 @@ static inline bool checkpoint_restore_ns_capable(struct user_namespace *ns) /* audit system wants to get cap info from files as well */ extern int get_vfs_caps_from_disk(const struct dentry *dentry, struct cpu_vfs_cap_data *cpu_caps); -extern int cap_convert_nscap(struct dentry *dentry, const void **ivalue, size_t size); +int cap_convert_nscap(struct user_namespace *mnt_userns, struct dentry *dentry, + const void **ivalue, size_t size); #endif /* !_LINUX_CAPABILITY_H */ diff --git a/include/linux/posix_acl.h b/include/linux/posix_acl.h index 85fb4c0c650a..6dcd8b8f6ab5 100644 --- a/include/linux/posix_acl.h +++ b/include/linux/posix_acl.h @@ -69,13 +69,15 @@ extern int __posix_acl_create(struct posix_acl **, gfp_t, umode_t *); extern int __posix_acl_chmod(struct posix_acl **, gfp_t, umode_t); extern struct posix_acl *get_posix_acl(struct inode *, int); -extern int set_posix_acl(struct inode *, int, struct posix_acl *); +extern int set_posix_acl(struct user_namespace *, struct inode *, int, + struct posix_acl *); #ifdef CONFIG_FS_POSIX_ACL -extern int posix_acl_chmod(struct inode *, umode_t); +int posix_acl_chmod(struct user_namespace *, struct inode *, umode_t); extern int posix_acl_create(struct inode *, umode_t *, struct posix_acl **, struct posix_acl **); -extern int posix_acl_update_mode(struct inode *, umode_t *, struct posix_acl **); +int posix_acl_update_mode(struct user_namespace *, struct inode *, umode_t *, + struct posix_acl **); extern int simple_set_acl(struct inode *, struct posix_acl *, int); extern int simple_acl_create(struct inode *, struct inode *); @@ -95,7 +97,8 @@ static inline void cache_no_acl(struct inode *inode) inode->i_default_acl = NULL; } #else -static inline int posix_acl_chmod(struct inode *inode, umode_t mode) +static inline int posix_acl_chmod(struct user_namespace *mnt_userns, + struct inode *inode, umode_t mode) { return 0; } diff --git a/include/linux/posix_acl_xattr.h b/include/linux/posix_acl_xattr.h index 2387709991b5..060e8d203181 100644 --- a/include/linux/posix_acl_xattr.h +++ b/include/linux/posix_acl_xattr.h @@ -33,13 +33,17 @@ posix_acl_xattr_count(size_t size) } #ifdef CONFIG_FS_POSIX_ACL -void posix_acl_fix_xattr_from_user(void *value, size_t size); -void posix_acl_fix_xattr_to_user(void *value, size_t size); +void posix_acl_fix_xattr_from_user(struct user_namespace *mnt_userns, + void *value, size_t size); +void posix_acl_fix_xattr_to_user(struct user_namespace *mnt_userns, + void *value, size_t size); #else -static inline void posix_acl_fix_xattr_from_user(void *value, size_t size) +static inline void posix_acl_fix_xattr_from_user(struct user_namespace *mnt_userns, + void *value, size_t size) { } -static inline void posix_acl_fix_xattr_to_user(void *value, size_t size) +static inline void posix_acl_fix_xattr_to_user(struct user_namespace *mnt_userns, + void *value, size_t size) { } #endif diff --git a/include/linux/xattr.h b/include/linux/xattr.h index 10b4dc2709f0..260c9bcb0edb 100644 --- a/include/linux/xattr.h +++ b/include/linux/xattr.h @@ -34,7 +34,8 @@ struct xattr_handler { int (*get)(const struct xattr_handler *, struct dentry *dentry, struct inode *inode, const char *name, void *buffer, size_t size); - int (*set)(const struct xattr_handler *, struct dentry *dentry, + int (*set)(const struct xattr_handler *, + struct user_namespace *mnt_userns, struct dentry *dentry, struct inode *inode, const char *name, const void *buffer, size_t size, int flags); }; diff --git a/mm/shmem.c b/mm/shmem.c index 1cb451e131ec..23b8e9c15a42 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -1143,7 +1143,7 @@ static int shmem_setattr(struct dentry *dentry, struct iattr *attr) setattr_copy(&init_user_ns, inode, attr); if (attr->ia_valid & ATTR_MODE) - error = posix_acl_chmod(inode, inode->i_mode); + error = posix_acl_chmod(&init_user_ns, inode, inode->i_mode); return error; } @@ -3273,6 +3273,7 @@ static int shmem_xattr_handler_get(const struct xattr_handler *handler, } static int shmem_xattr_handler_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *unused, struct inode *inode, const char *name, const void *value, size_t size, int flags) diff --git a/net/socket.c b/net/socket.c index 33e8b6c4e1d3..c76703c6f480 100644 --- a/net/socket.c +++ b/net/socket.c @@ -334,6 +334,7 @@ static const struct xattr_handler sockfs_xattr_handler = { }; static int sockfs_security_xattr_set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, struct dentry *dentry, struct inode *inode, const char *suffix, const void *value, size_t size, int flags) diff --git a/security/commoncap.c b/security/commoncap.c index 88ee345f7bfa..c3fd9b86ea9a 100644 --- a/security/commoncap.c +++ b/security/commoncap.c @@ -450,16 +450,33 @@ int cap_inode_getsecurity(struct inode *inode, const char *name, void **buffer, return size; } +/** + * rootid_from_xattr - translate root uid of vfs caps + * + * @value: vfs caps value which may be modified by this function + * @size: size of @ivalue + * @task_ns: user namespace of the caller + * @mnt_userns: user namespace of the mount the inode was found from + * + * If the inode has been found through an idmapped mount the user namespace of + * the vfsmount must be passed through @mnt_userns. This function will then + * take care to map the inode according to @mnt_userns before checking + * permissions. On non-idmapped mounts or if permission checking is to be + * performed on the raw inode simply passs init_user_ns. + */ static kuid_t rootid_from_xattr(const void *value, size_t size, - struct user_namespace *task_ns) + struct user_namespace *task_ns, + struct user_namespace *mnt_userns) { const struct vfs_ns_cap_data *nscap = value; + kuid_t rootkid; uid_t rootid = 0; if (size == XATTR_CAPS_SZ_3) rootid = le32_to_cpu(nscap->rootid); - return make_kuid(task_ns, rootid); + rootkid = make_kuid(task_ns, rootid); + return kuid_from_mnt(mnt_userns, rootkid); } static bool validheader(size_t size, const struct vfs_cap_data *cap) @@ -467,13 +484,27 @@ static bool validheader(size_t size, const struct vfs_cap_data *cap) return is_v2header(size, cap) || is_v3header(size, cap); } -/* +/** + * cap_convert_nscap - check vfs caps + * + * @mnt_userns: user namespace of the mount the inode was found from + * @dentry: used to retrieve inode to check permissions on + * @ivalue: vfs caps value which may be modified by this function + * @size: size of @ivalue + * * User requested a write of security.capability. If needed, update the * xattr to change from v2 to v3, or to fixup the v3 rootid. * + * If the inode has been found through an idmapped mount the user namespace of + * the vfsmount must be passed through @mnt_userns. This function will then + * take care to map the inode according to @mnt_userns before checking + * permissions. On non-idmapped mounts or if permission checking is to be + * performed on the raw inode simply passs init_user_ns. + * * If all is ok, we return the new size, on error return < 0. */ -int cap_convert_nscap(struct dentry *dentry, const void **ivalue, size_t size) +int cap_convert_nscap(struct user_namespace *mnt_userns, struct dentry *dentry, + const void **ivalue, size_t size) { struct vfs_ns_cap_data *nscap; uid_t nsrootid; @@ -489,14 +520,14 @@ int cap_convert_nscap(struct dentry *dentry, const void **ivalue, size_t size) return -EINVAL; if (!validheader(size, cap)) return -EINVAL; - if (!capable_wrt_inode_uidgid(&init_user_ns, inode, CAP_SETFCAP)) + if (!capable_wrt_inode_uidgid(mnt_userns, inode, CAP_SETFCAP)) return -EPERM; - if (size == XATTR_CAPS_SZ_2) + if (size == XATTR_CAPS_SZ_2 && (mnt_userns == &init_user_ns)) if (ns_capable(inode->i_sb->s_user_ns, CAP_SETFCAP)) /* user is privileged, just write the v2 */ return size; - rootid = rootid_from_xattr(*ivalue, size, task_ns); + rootid = rootid_from_xattr(*ivalue, size, task_ns, mnt_userns); if (!uid_valid(rootid)) return -EINVAL; |