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-rw-r--r--fs/coredump.c4
-rw-r--r--fs/exec.c16
-rw-r--r--fs/fuse/acl.c2
-rw-r--r--fs/inode.c8
-rw-r--r--fs/namei.c40
-rw-r--r--fs/overlayfs/util.c9
-rw-r--r--fs/remap_range.c2
-rw-r--r--fs/stat.c7
-rw-r--r--include/linux/fs.h34
-rw-r--r--include/linux/mnt_idmapping.h100
-rw-r--r--kernel/capability.c4
-rw-r--r--security/apparmor/domain.c8
-rw-r--r--security/apparmor/file.c4
-rw-r--r--security/apparmor/lsm.c25
-rw-r--r--security/commoncap.c51
-rw-r--r--security/integrity/ima/ima_policy.c34
16 files changed, 150 insertions, 198 deletions
diff --git a/fs/coredump.c b/fs/coredump.c
index 9a745d08c57f..a4c30bb900fe 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -720,8 +720,8 @@ void do_coredump(const kernel_siginfo_t *siginfo)
* filesystem.
*/
mnt_userns = file_mnt_user_ns(cprm.file);
- if (!uid_eq(i_uid_into_mnt(mnt_userns, inode),
- current_fsuid())) {
+ if (!vfsuid_eq_kuid(i_uid_into_vfsuid(mnt_userns, inode),
+ current_fsuid())) {
pr_info_ratelimited("Core dump to %s aborted: cannot preserve file owner\n",
cn.corename);
goto close_fail;
diff --git a/fs/exec.c b/fs/exec.c
index 089a743f636b..ab913243a367 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1599,8 +1599,8 @@ static void bprm_fill_uid(struct linux_binprm *bprm, struct file *file)
struct user_namespace *mnt_userns;
struct inode *inode = file_inode(file);
unsigned int mode;
- kuid_t uid;
- kgid_t gid;
+ vfsuid_t vfsuid;
+ vfsgid_t vfsgid;
if (!mnt_may_suid(file->f_path.mnt))
return;
@@ -1619,23 +1619,23 @@ static void bprm_fill_uid(struct linux_binprm *bprm, struct file *file)
/* reload atomically mode/uid/gid now that lock held */
mode = inode->i_mode;
- uid = i_uid_into_mnt(mnt_userns, inode);
- gid = i_gid_into_mnt(mnt_userns, inode);
+ vfsuid = i_uid_into_vfsuid(mnt_userns, inode);
+ vfsgid = i_gid_into_vfsgid(mnt_userns, inode);
inode_unlock(inode);
/* We ignore suid/sgid if there are no mappings for them in the ns */
- if (!kuid_has_mapping(bprm->cred->user_ns, uid) ||
- !kgid_has_mapping(bprm->cred->user_ns, gid))
+ if (!vfsuid_has_mapping(bprm->cred->user_ns, vfsuid) ||
+ !vfsgid_has_mapping(bprm->cred->user_ns, vfsgid))
return;
if (mode & S_ISUID) {
bprm->per_clear |= PER_CLEAR_ON_SETID;
- bprm->cred->euid = uid;
+ bprm->cred->euid = vfsuid_into_kuid(vfsuid);
}
if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) {
bprm->per_clear |= PER_CLEAR_ON_SETID;
- bprm->cred->egid = gid;
+ bprm->cred->egid = vfsgid_into_kgid(vfsgid);
}
}
diff --git a/fs/fuse/acl.c b/fs/fuse/acl.c
index 8edd0f313515..a4850aee2639 100644
--- a/fs/fuse/acl.c
+++ b/fs/fuse/acl.c
@@ -99,7 +99,7 @@ int fuse_set_acl(struct user_namespace *mnt_userns, struct dentry *dentry,
return ret;
}
- if (!in_group_p(i_gid_into_mnt(&init_user_ns, inode)) &&
+ if (!vfsgid_in_group_p(i_gid_into_vfsgid(&init_user_ns, inode)) &&
!capable_wrt_inode_uidgid(&init_user_ns, inode, CAP_FSETID))
extra_flags |= FUSE_SETXATTR_ACL_KILL_SGID;
diff --git a/fs/inode.c b/fs/inode.c
index 5ccc61fe8a1f..f453eb58fd03 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -2323,15 +2323,15 @@ EXPORT_SYMBOL(inode_init_owner);
bool inode_owner_or_capable(struct user_namespace *mnt_userns,
const struct inode *inode)
{
- kuid_t i_uid;
+ vfsuid_t vfsuid;
struct user_namespace *ns;
- i_uid = i_uid_into_mnt(mnt_userns, inode);
- if (uid_eq(current_fsuid(), i_uid))
+ vfsuid = i_uid_into_vfsuid(mnt_userns, inode);
+ if (vfsuid_eq_kuid(vfsuid, current_fsuid()))
return true;
ns = current_user_ns();
- if (kuid_has_mapping(ns, i_uid) && ns_capable(ns, CAP_FOWNER))
+ if (vfsuid_has_mapping(ns, vfsuid) && ns_capable(ns, CAP_FOWNER))
return true;
return false;
}
diff --git a/fs/namei.c b/fs/namei.c
index 7bfebfa993ed..720270dc9fe5 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -336,11 +336,11 @@ static int acl_permission_check(struct user_namespace *mnt_userns,
struct inode *inode, int mask)
{
unsigned int mode = inode->i_mode;
- kuid_t i_uid;
+ vfsuid_t vfsuid;
/* Are we the owner? If so, ACL's don't matter */
- i_uid = i_uid_into_mnt(mnt_userns, inode);
- if (likely(uid_eq(current_fsuid(), i_uid))) {
+ vfsuid = i_uid_into_vfsuid(mnt_userns, inode);
+ if (likely(vfsuid_eq_kuid(vfsuid, current_fsuid()))) {
mask &= 7;
mode >>= 6;
return (mask & ~mode) ? -EACCES : 0;
@@ -362,8 +362,8 @@ static int acl_permission_check(struct user_namespace *mnt_userns,
* about? Need to check group ownership if so.
*/
if (mask & (mode ^ (mode >> 3))) {
- kgid_t kgid = i_gid_into_mnt(mnt_userns, inode);
- if (in_group_p(kgid))
+ vfsgid_t vfsgid = i_gid_into_vfsgid(mnt_userns, inode);
+ if (vfsgid_in_group_p(vfsgid))
mode >>= 3;
}
@@ -581,7 +581,7 @@ struct nameidata {
struct nameidata *saved;
unsigned root_seq;
int dfd;
- kuid_t dir_uid;
+ vfsuid_t dir_vfsuid;
umode_t dir_mode;
} __randomize_layout;
@@ -1095,15 +1095,15 @@ fs_initcall(init_fs_namei_sysctls);
static inline int may_follow_link(struct nameidata *nd, const struct inode *inode)
{
struct user_namespace *mnt_userns;
- kuid_t i_uid;
+ vfsuid_t vfsuid;
if (!sysctl_protected_symlinks)
return 0;
mnt_userns = mnt_user_ns(nd->path.mnt);
- i_uid = i_uid_into_mnt(mnt_userns, inode);
+ vfsuid = i_uid_into_vfsuid(mnt_userns, inode);
/* Allowed if owner and follower match. */
- if (uid_eq(current_cred()->fsuid, i_uid))
+ if (vfsuid_eq_kuid(vfsuid, current_fsuid()))
return 0;
/* Allowed if parent directory not sticky and world-writable. */
@@ -1111,7 +1111,7 @@ static inline int may_follow_link(struct nameidata *nd, const struct inode *inod
return 0;
/* Allowed if parent directory and link owner match. */
- if (uid_valid(nd->dir_uid) && uid_eq(nd->dir_uid, i_uid))
+ if (vfsuid_valid(nd->dir_vfsuid) && vfsuid_eq(nd->dir_vfsuid, vfsuid))
return 0;
if (nd->flags & LOOKUP_RCU)
@@ -1183,8 +1183,8 @@ int may_linkat(struct user_namespace *mnt_userns, const struct path *link)
struct inode *inode = link->dentry->d_inode;
/* Inode writeback is not safe when the uid or gid are invalid. */
- if (!uid_valid(i_uid_into_mnt(mnt_userns, inode)) ||
- !gid_valid(i_gid_into_mnt(mnt_userns, inode)))
+ if (!vfsuid_valid(i_uid_into_vfsuid(mnt_userns, inode)) ||
+ !vfsgid_valid(i_gid_into_vfsgid(mnt_userns, inode)))
return -EOVERFLOW;
if (!sysctl_protected_hardlinks)
@@ -1232,13 +1232,13 @@ static int may_create_in_sticky(struct user_namespace *mnt_userns,
struct nameidata *nd, struct inode *const inode)
{
umode_t dir_mode = nd->dir_mode;
- kuid_t dir_uid = nd->dir_uid;
+ vfsuid_t dir_vfsuid = nd->dir_vfsuid;
if ((!sysctl_protected_fifos && S_ISFIFO(inode->i_mode)) ||
(!sysctl_protected_regular && S_ISREG(inode->i_mode)) ||
likely(!(dir_mode & S_ISVTX)) ||
- uid_eq(i_uid_into_mnt(mnt_userns, inode), dir_uid) ||
- uid_eq(current_fsuid(), i_uid_into_mnt(mnt_userns, inode)))
+ vfsuid_eq(i_uid_into_vfsuid(mnt_userns, inode), dir_vfsuid) ||
+ vfsuid_eq_kuid(i_uid_into_vfsuid(mnt_userns, inode), current_fsuid()))
return 0;
if (likely(dir_mode & 0002) ||
@@ -2307,7 +2307,7 @@ static int link_path_walk(const char *name, struct nameidata *nd)
OK:
/* pathname or trailing symlink, done */
if (!depth) {
- nd->dir_uid = i_uid_into_mnt(mnt_userns, nd->inode);
+ nd->dir_vfsuid = i_uid_into_vfsuid(mnt_userns, nd->inode);
nd->dir_mode = nd->inode->i_mode;
nd->flags &= ~LOOKUP_PARENT;
return 0;
@@ -2885,9 +2885,9 @@ int __check_sticky(struct user_namespace *mnt_userns, struct inode *dir,
{
kuid_t fsuid = current_fsuid();
- if (uid_eq(i_uid_into_mnt(mnt_userns, inode), fsuid))
+ if (vfsuid_eq_kuid(i_uid_into_vfsuid(mnt_userns, inode), fsuid))
return 0;
- if (uid_eq(i_uid_into_mnt(mnt_userns, dir), fsuid))
+ if (vfsuid_eq_kuid(i_uid_into_vfsuid(mnt_userns, dir), fsuid))
return 0;
return !capable_wrt_inode_uidgid(mnt_userns, inode, CAP_FOWNER);
}
@@ -2926,8 +2926,8 @@ static int may_delete(struct user_namespace *mnt_userns, struct inode *dir,
BUG_ON(victim->d_parent->d_inode != dir);
/* Inode writeback is not safe when the uid or gid are invalid. */
- if (!uid_valid(i_uid_into_mnt(mnt_userns, inode)) ||
- !gid_valid(i_gid_into_mnt(mnt_userns, inode)))
+ if (!vfsuid_valid(i_uid_into_vfsuid(mnt_userns, inode)) ||
+ !vfsgid_valid(i_gid_into_vfsgid(mnt_userns, inode)))
return -EOVERFLOW;
audit_inode_child(dir, victim, AUDIT_TYPE_CHILD_DELETE);
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c
index 81a57a8d80d9..c0c20d33691b 100644
--- a/fs/overlayfs/util.c
+++ b/fs/overlayfs/util.c
@@ -1104,13 +1104,18 @@ void ovl_copyattr(struct inode *inode)
struct path realpath;
struct inode *realinode;
struct user_namespace *real_mnt_userns;
+ vfsuid_t vfsuid;
+ vfsgid_t vfsgid;
ovl_i_path_real(inode, &realpath);
realinode = d_inode(realpath.dentry);
real_mnt_userns = mnt_user_ns(realpath.mnt);
- inode->i_uid = i_uid_into_mnt(real_mnt_userns, realinode);
- inode->i_gid = i_gid_into_mnt(real_mnt_userns, realinode);
+ vfsuid = i_uid_into_vfsuid(real_mnt_userns, realinode);
+ vfsgid = i_gid_into_vfsgid(real_mnt_userns, realinode);
+
+ inode->i_uid = vfsuid_into_kuid(vfsuid);
+ inode->i_gid = vfsgid_into_kgid(vfsgid);
inode->i_mode = realinode->i_mode;
inode->i_atime = realinode->i_atime;
inode->i_mtime = realinode->i_mtime;
diff --git a/fs/remap_range.c b/fs/remap_range.c
index 654912d06862..290743c8d226 100644
--- a/fs/remap_range.c
+++ b/fs/remap_range.c
@@ -429,7 +429,7 @@ static bool allow_file_dedupe(struct file *file)
return true;
if (file->f_mode & FMODE_WRITE)
return true;
- if (uid_eq(current_fsuid(), i_uid_into_mnt(mnt_userns, inode)))
+ if (vfsuid_eq_kuid(i_uid_into_vfsuid(mnt_userns, inode), current_fsuid()))
return true;
if (!inode_permission(mnt_userns, inode, MAY_WRITE))
return true;
diff --git a/fs/stat.c b/fs/stat.c
index ef50573c72a2..d6cc74ca8486 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -44,12 +44,15 @@
void generic_fillattr(struct user_namespace *mnt_userns, struct inode *inode,
struct kstat *stat)
{
+ vfsuid_t vfsuid = i_uid_into_vfsuid(mnt_userns, inode);
+ vfsgid_t vfsgid = i_gid_into_vfsgid(mnt_userns, inode);
+
stat->dev = inode->i_sb->s_dev;
stat->ino = inode->i_ino;
stat->mode = inode->i_mode;
stat->nlink = inode->i_nlink;
- stat->uid = i_uid_into_mnt(mnt_userns, inode);
- stat->gid = i_gid_into_mnt(mnt_userns, inode);
+ stat->uid = vfsuid_into_kuid(vfsuid);
+ stat->gid = vfsgid_into_kgid(vfsgid);
stat->rdev = inode->i_rdev;
stat->size = i_size_read(inode);
stat->atime = inode->i_atime;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index effa4a2e5098..9caf38e3f6e7 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1632,23 +1632,6 @@ static inline void i_gid_write(struct inode *inode, gid_t gid)
}
/**
- * i_uid_into_mnt - map an inode's i_uid down into a mnt_userns
- * @mnt_userns: user namespace of the mount the inode was found from
- * @inode: inode to map
- *
- * Note, this will eventually be removed completely in favor of the type-safe
- * i_uid_into_vfsuid().
- *
- * Return: the inode's i_uid mapped down according to @mnt_userns.
- * If the inode's i_uid has no mapping INVALID_UID is returned.
- */
-static inline kuid_t i_uid_into_mnt(struct user_namespace *mnt_userns,
- const struct inode *inode)
-{
- return AS_KUIDT(make_vfsuid(mnt_userns, i_user_ns(inode), inode->i_uid));
-}
-
-/**
* i_uid_into_vfsuid - map an inode's i_uid down into a mnt_userns
* @mnt_userns: user namespace of the mount the inode was found from
* @inode: inode to map
@@ -1701,23 +1684,6 @@ static inline void i_uid_update(struct user_namespace *mnt_userns,
}
/**
- * i_gid_into_mnt - map an inode's i_gid down into a mnt_userns
- * @mnt_userns: user namespace of the mount the inode was found from
- * @inode: inode to map
- *
- * Note, this will eventually be removed completely in favor of the type-safe
- * i_gid_into_vfsgid().
- *
- * Return: the inode's i_gid mapped down according to @mnt_userns.
- * If the inode's i_gid has no mapping INVALID_GID is returned.
- */
-static inline kgid_t i_gid_into_mnt(struct user_namespace *mnt_userns,
- const struct inode *inode)
-{
- return AS_KGIDT(make_vfsgid(mnt_userns, i_user_ns(inode), inode->i_gid));
-}
-
-/**
* i_gid_into_vfsgid - map an inode's i_gid down into a mnt_userns
* @mnt_userns: user namespace of the mount the inode was found from
* @inode: inode to map
diff --git a/include/linux/mnt_idmapping.h b/include/linux/mnt_idmapping.h
index f6e5369d2928..c8002294a72d 100644
--- a/include/linux/mnt_idmapping.h
+++ b/include/linux/mnt_idmapping.h
@@ -98,6 +98,26 @@ static inline bool vfsgid_eq_kgid(vfsgid_t vfsgid, kgid_t kgid)
return vfsgid_valid(vfsgid) && __vfsgid_val(vfsgid) == __kgid_val(kgid);
}
+static inline bool vfsuid_gt_kuid(vfsuid_t vfsuid, kuid_t kuid)
+{
+ return __vfsuid_val(vfsuid) > __kuid_val(kuid);
+}
+
+static inline bool vfsgid_gt_kgid(vfsgid_t vfsgid, kgid_t kgid)
+{
+ return __vfsgid_val(vfsgid) > __kgid_val(kgid);
+}
+
+static inline bool vfsuid_lt_kuid(vfsuid_t vfsuid, kuid_t kuid)
+{
+ return __vfsuid_val(vfsuid) < __kuid_val(kuid);
+}
+
+static inline bool vfsgid_lt_kgid(vfsgid_t vfsgid, kgid_t kgid)
+{
+ return __vfsgid_val(vfsgid) < __kgid_val(kgid);
+}
+
/*
* vfs{g,u}ids are created from k{g,u}ids.
* We don't allow them to be created from regular {u,g}id.
@@ -208,13 +228,6 @@ static inline vfsuid_t make_vfsuid(struct user_namespace *mnt_userns,
return VFSUIDT_INIT(make_kuid(mnt_userns, uid));
}
-static inline kuid_t mapped_kuid_fs(struct user_namespace *mnt_userns,
- struct user_namespace *fs_userns,
- kuid_t kuid)
-{
- return AS_KUIDT(make_vfsuid(mnt_userns, fs_userns, kuid));
-}
-
/**
* make_vfsgid - map a filesystem kgid into a mnt_userns
* @mnt_userns: the mount's idmapping
@@ -253,13 +266,6 @@ static inline vfsgid_t make_vfsgid(struct user_namespace *mnt_userns,
return VFSGIDT_INIT(make_kgid(mnt_userns, gid));
}
-static inline kgid_t mapped_kgid_fs(struct user_namespace *mnt_userns,
- struct user_namespace *fs_userns,
- kgid_t kgid)
-{
- return AS_KGIDT(make_vfsgid(mnt_userns, fs_userns, kgid));
-}
-
/**
* from_vfsuid - map a vfsuid into the filesystem idmapping
* @mnt_userns: the mount's idmapping
@@ -288,33 +294,6 @@ static inline kuid_t from_vfsuid(struct user_namespace *mnt_userns,
}
/**
- * mapped_kuid_user - map a user kuid into a mnt_userns
- * @mnt_userns: the mount's idmapping
- * @fs_userns: the filesystem's idmapping
- * @kuid : kuid to be mapped
- *
- * Use the idmapping of @mnt_userns to remap a @kuid into @fs_userns. Use this
- * function when preparing a @kuid to be written to disk or inode.
- *
- * If no_idmapping() determines that this is not an idmapped mount we can
- * simply return @kuid unchanged.
- * If initial_idmapping() tells us that the filesystem is not mounted with an
- * idmapping we know the value of @kuid won't change when calling
- * make_kuid() so we can simply retrieve the value via KUIDT_INIT()
- * directly.
- *
- * Return: @kuid mapped according to @mnt_userns.
- * If @kuid has no mapping in either @mnt_userns or @fs_userns INVALID_UID is
- * returned.
- */
-static inline kuid_t mapped_kuid_user(struct user_namespace *mnt_userns,
- struct user_namespace *fs_userns,
- kuid_t kuid)
-{
- return from_vfsuid(mnt_userns, fs_userns, VFSUIDT_INIT(kuid));
-}
-
-/**
* vfsuid_has_fsmapping - check whether a vfsuid maps into the filesystem
* @mnt_userns: the mount's idmapping
* @fs_userns: the filesystem's idmapping
@@ -333,6 +312,12 @@ static inline bool vfsuid_has_fsmapping(struct user_namespace *mnt_userns,
return uid_valid(from_vfsuid(mnt_userns, fs_userns, vfsuid));
}
+static inline bool vfsuid_has_mapping(struct user_namespace *userns,
+ vfsuid_t vfsuid)
+{
+ return from_kuid(userns, AS_KUIDT(vfsuid)) != (uid_t)-1;
+}
+
/**
* vfsuid_into_kuid - convert vfsuid into kuid
* @vfsuid: the vfsuid to convert
@@ -374,33 +359,6 @@ static inline kgid_t from_vfsgid(struct user_namespace *mnt_userns,
}
/**
- * mapped_kgid_user - map a user kgid into a mnt_userns
- * @mnt_userns: the mount's idmapping
- * @fs_userns: the filesystem's idmapping
- * @kgid : kgid to be mapped
- *
- * Use the idmapping of @mnt_userns to remap a @kgid into @fs_userns. Use this
- * function when preparing a @kgid to be written to disk or inode.
- *
- * If no_idmapping() determines that this is not an idmapped mount we can
- * simply return @kgid unchanged.
- * If initial_idmapping() tells us that the filesystem is not mounted with an
- * idmapping we know the value of @kgid won't change when calling
- * make_kgid() so we can simply retrieve the value via KGIDT_INIT()
- * directly.
- *
- * Return: @kgid mapped according to @mnt_userns.
- * If @kgid has no mapping in either @mnt_userns or @fs_userns INVALID_GID is
- * returned.
- */
-static inline kgid_t mapped_kgid_user(struct user_namespace *mnt_userns,
- struct user_namespace *fs_userns,
- kgid_t kgid)
-{
- return from_vfsgid(mnt_userns, fs_userns, VFSGIDT_INIT(kgid));
-}
-
-/**
* vfsgid_has_fsmapping - check whether a vfsgid maps into the filesystem
* @mnt_userns: the mount's idmapping
* @fs_userns: the filesystem's idmapping
@@ -419,6 +377,12 @@ static inline bool vfsgid_has_fsmapping(struct user_namespace *mnt_userns,
return gid_valid(from_vfsgid(mnt_userns, fs_userns, vfsgid));
}
+static inline bool vfsgid_has_mapping(struct user_namespace *userns,
+ vfsgid_t vfsgid)
+{
+ return from_kgid(userns, AS_KGIDT(vfsgid)) != (gid_t)-1;
+}
+
/**
* vfsgid_into_kgid - convert vfsgid into kgid
* @vfsgid: the vfsgid to convert
diff --git a/kernel/capability.c b/kernel/capability.c
index 765194f5d678..860fd22117c1 100644
--- a/kernel/capability.c
+++ b/kernel/capability.c
@@ -489,8 +489,8 @@ bool privileged_wrt_inode_uidgid(struct user_namespace *ns,
struct user_namespace *mnt_userns,
const struct inode *inode)
{
- return kuid_has_mapping(ns, i_uid_into_mnt(mnt_userns, inode)) &&
- kgid_has_mapping(ns, i_gid_into_mnt(mnt_userns, inode));
+ return vfsuid_has_mapping(ns, i_uid_into_vfsuid(mnt_userns, inode)) &&
+ vfsgid_has_mapping(ns, i_gid_into_vfsgid(mnt_userns, inode));
}
/**
diff --git a/security/apparmor/domain.c b/security/apparmor/domain.c
index 91689d34d281..7bafb4c4767c 100644
--- a/security/apparmor/domain.c
+++ b/security/apparmor/domain.c
@@ -859,10 +859,10 @@ int apparmor_bprm_creds_for_exec(struct linux_binprm *bprm)
const char *info = NULL;
int error = 0;
bool unsafe = false;
- kuid_t i_uid = i_uid_into_mnt(file_mnt_user_ns(bprm->file),
- file_inode(bprm->file));
+ vfsuid_t vfsuid = i_uid_into_vfsuid(file_mnt_user_ns(bprm->file),
+ file_inode(bprm->file));
struct path_cond cond = {
- i_uid,
+ vfsuid_into_kuid(vfsuid),
file_inode(bprm->file)->i_mode
};
@@ -970,7 +970,7 @@ audit:
error = fn_for_each(label, profile,
aa_audit_file(profile, &nullperms, OP_EXEC, MAY_EXEC,
bprm->filename, NULL, new,
- i_uid, info, error));
+ vfsuid_into_kuid(vfsuid), info, error));
aa_put_label(new);
goto done;
}
diff --git a/security/apparmor/file.c b/security/apparmor/file.c
index e1b7e93602e4..d43679894d23 100644
--- a/security/apparmor/file.c
+++ b/security/apparmor/file.c
@@ -510,8 +510,10 @@ static int __file_path_perm(const char *op, struct aa_label *label,
{
struct aa_profile *profile;
struct aa_perms perms = {};
+ vfsuid_t vfsuid = i_uid_into_vfsuid(file_mnt_user_ns(file),
+ file_inode(file));
struct path_cond cond = {
- .uid = i_uid_into_mnt(file_mnt_user_ns(file), file_inode(file)),
+ .uid = vfsuid_into_kuid(vfsuid),
.mode = file_inode(file)->i_mode
};
char *buffer;
diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c
index f56070270c69..f34675f7c3df 100644
--- a/security/apparmor/lsm.c
+++ b/security/apparmor/lsm.c
@@ -225,8 +225,10 @@ static int common_perm(const char *op, const struct path *path, u32 mask,
static int common_perm_cond(const char *op, const struct path *path, u32 mask)
{
struct user_namespace *mnt_userns = mnt_user_ns(path->mnt);
+ vfsuid_t vfsuid = i_uid_into_vfsuid(mnt_userns,
+ d_backing_inode(path->dentry));
struct path_cond cond = {
- i_uid_into_mnt(mnt_userns, d_backing_inode(path->dentry)),
+ vfsuid_into_kuid(vfsuid),
d_backing_inode(path->dentry)->i_mode
};
@@ -270,11 +272,13 @@ static int common_perm_rm(const char *op, const struct path *dir,
struct inode *inode = d_backing_inode(dentry);
struct user_namespace *mnt_userns = mnt_user_ns(dir->mnt);
struct path_cond cond = { };
+ vfsuid_t vfsuid;
if (!inode || !path_mediated_fs(dentry))
return 0;
- cond.uid = i_uid_into_mnt(mnt_userns, inode);
+ vfsuid = i_uid_into_vfsuid(mnt_userns, inode);
+ cond.uid = vfsuid_into_kuid(vfsuid);
cond.mode = inode->i_mode;
return common_perm_dir_dentry(op, dir, dentry, mask, &cond);
@@ -368,20 +372,23 @@ static int apparmor_path_rename(const struct path *old_dir, struct dentry *old_d
label = begin_current_label_crit_section();
if (!unconfined(label)) {
struct user_namespace *mnt_userns = mnt_user_ns(old_dir->mnt);
+ vfsuid_t vfsuid;
struct path old_path = { .mnt = old_dir->mnt,
.dentry = old_dentry };
struct path new_path = { .mnt = new_dir->mnt,
.dentry = new_dentry };
struct path_cond cond = {
- i_uid_into_mnt(mnt_userns, d_backing_inode(old_dentry)),
- d_backing_inode(old_dentry)->i_mode
+ .mode = d_backing_inode(old_dentry)->i_mode
};
+ vfsuid = i_uid_into_vfsuid(mnt_userns, d_backing_inode(old_dentry));
+ cond.uid = vfsuid_into_kuid(vfsuid);
if (flags & RENAME_EXCHANGE) {
struct path_cond cond_exchange = {
- i_uid_into_mnt(mnt_userns, d_backing_inode(new_dentry)),
- d_backing_inode(new_dentry)->i_mode
+ .mode = d_backing_inode(new_dentry)->i_mode,
};
+ vfsuid = i_uid_into_vfsuid(mnt_userns, d_backing_inode(old_dentry));
+ cond_exchange.uid = vfsuid_into_kuid(vfsuid);
error = aa_path_perm(OP_RENAME_SRC, label, &new_path, 0,
MAY_READ | AA_MAY_GETATTR | MAY_WRITE |
@@ -447,10 +454,12 @@ static int apparmor_file_open(struct file *file)
if (!unconfined(label)) {
struct user_namespace *mnt_userns = file_mnt_user_ns(file);
struct inode *inode = file_inode(file);
+ vfsuid_t vfsuid;
struct path_cond cond = {
- i_uid_into_mnt(mnt_userns, inode),
- inode->i_mode
+ .mode = inode->i_mode,
};
+ vfsuid = i_uid_into_vfsuid(mnt_userns, inode);
+ cond.uid = vfsuid_into_kuid(vfsuid);
error = aa_path_perm(OP_OPEN, label, &file->f_path, 0,
aa_map_file_to_perms(file), &cond);
diff --git a/security/commoncap.c b/security/commoncap.c
index bc751fa5adad..5d9570f54a1c 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -328,14 +328,16 @@ int cap_inode_killpriv(struct user_namespace *mnt_userns, struct dentry *dentry)
return error;
}
-static bool rootid_owns_currentns(kuid_t kroot)
+static bool rootid_owns_currentns(vfsuid_t rootvfsuid)
{
struct user_namespace *ns;
+ kuid_t kroot;
- if (!uid_valid(kroot))
+ if (!vfsuid_valid(rootvfsuid))
return false;
- for (ns = current_user_ns(); ; ns = ns->parent) {
+ kroot = vfsuid_into_kuid(rootvfsuid);
+ for (ns = current_user_ns();; ns = ns->parent) {
if (from_kuid(ns, kroot) == 0)
return true;
if (ns == &init_user_ns)
@@ -381,6 +383,7 @@ int cap_inode_getsecurity(struct user_namespace *mnt_userns,
{
int size, ret;
kuid_t kroot;
+ vfsuid_t vfsroot;
u32 nsmagic, magic;
uid_t root, mappedroot;
char *tmpbuf = NULL;
@@ -421,11 +424,11 @@ int cap_inode_getsecurity(struct user_namespace *mnt_userns,
kroot = make_kuid(fs_ns, root);
/* If this is an idmapped mount shift the kuid. */
- kroot = mapped_kuid_fs(mnt_userns, fs_ns, kroot);
+ vfsroot = make_vfsuid(mnt_userns, fs_ns, kroot);
/* If the root kuid maps to a valid uid in current ns, then return
* this as a nscap. */
- mappedroot = from_kuid(current_user_ns(), kroot);
+ mappedroot = from_kuid(current_user_ns(), vfsuid_into_kuid(vfsroot));
if (mappedroot != (uid_t)-1 && mappedroot != (uid_t)0) {
size = sizeof(struct vfs_ns_cap_data);
if (alloc) {
@@ -452,7 +455,7 @@ int cap_inode_getsecurity(struct user_namespace *mnt_userns,
goto out_free;
}
- if (!rootid_owns_currentns(kroot)) {
+ if (!rootid_owns_currentns(vfsroot)) {
size = -EOVERFLOW;
goto out_free;
}
@@ -490,29 +493,17 @@ out_free:
* @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
- * @fs_userns: user namespace of the filesystem
- *
- * 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 *mnt_userns,
- struct user_namespace *fs_userns)
+static vfsuid_t rootid_from_xattr(const void *value, size_t size,
+ struct user_namespace *task_ns)
{
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);
- rootkid = make_kuid(task_ns, rootid);
- return mapped_kuid_user(mnt_userns, fs_userns, rootkid);
+ return VFSUIDT_INIT(make_kuid(task_ns, rootid));
}
static bool validheader(size_t size, const struct vfs_cap_data *cap)
@@ -550,6 +541,7 @@ int cap_convert_nscap(struct user_namespace *mnt_userns, struct dentry *dentry,
struct user_namespace *task_ns = current_user_ns(),
*fs_ns = inode->i_sb->s_user_ns;
kuid_t rootid;
+ vfsuid_t vfsrootid;
size_t newsize;
if (!*ivalue)
@@ -563,7 +555,11 @@ int cap_convert_nscap(struct user_namespace *mnt_userns, struct dentry *dentry,
/* user is privileged, just write the v2 */
return size;
- rootid = rootid_from_xattr(*ivalue, size, task_ns, mnt_userns, fs_ns);
+ vfsrootid = rootid_from_xattr(*ivalue, size, task_ns);
+ if (!vfsuid_valid(vfsrootid))
+ return -EINVAL;
+
+ rootid = from_vfsuid(mnt_userns, fs_ns, vfsrootid);
if (!uid_valid(rootid))
return -EINVAL;
@@ -657,6 +653,7 @@ int get_vfs_caps_from_disk(struct user_namespace *mnt_userns,
struct vfs_ns_cap_data data, *nscaps = &data;
struct vfs_cap_data *caps = (struct vfs_cap_data *) &data;
kuid_t rootkuid;
+ vfsuid_t rootvfsuid;
struct user_namespace *fs_ns;
memset(cpu_caps, 0, sizeof(struct cpu_vfs_cap_data));
@@ -701,11 +698,15 @@ int get_vfs_caps_from_disk(struct user_namespace *mnt_userns,
default:
return -EINVAL;
}
+
+ rootvfsuid = make_vfsuid(mnt_userns, fs_ns, rootkuid);
+ if (!vfsuid_valid(rootvfsuid))
+ return -ENODATA;
+
/* Limit the caps to the mounter of the filesystem
* or the more limited uid specified in the xattr.
*/
- rootkuid = mapped_kuid_fs(mnt_userns, fs_ns, rootkuid);
- if (!rootid_owns_currentns(rootkuid))
+ if (!rootid_owns_currentns(rootvfsuid))
return -ENODATA;
CAP_FOR_EACH_U32(i) {
@@ -718,7 +719,7 @@ int get_vfs_caps_from_disk(struct user_namespace *mnt_userns,
cpu_caps->permitted.cap[CAP_LAST_U32] &= CAP_LAST_U32_VALID_MASK;
cpu_caps->inheritable.cap[CAP_LAST_U32] &= CAP_LAST_U32_VALID_MASK;
- cpu_caps->rootid = rootkuid;
+ cpu_caps->rootid = vfsuid_into_kuid(rootvfsuid);
return 0;
}
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index a8802b8da946..54c475f98ce1 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -85,8 +85,8 @@ struct ima_rule_entry {
kgid_t fgroup;
bool (*uid_op)(kuid_t cred_uid, kuid_t rule_uid); /* Handlers for operators */
bool (*gid_op)(kgid_t cred_gid, kgid_t rule_gid);
- bool (*fowner_op)(kuid_t cred_uid, kuid_t rule_uid); /* uid_eq(), uid_gt(), uid_lt() */
- bool (*fgroup_op)(kgid_t cred_gid, kgid_t rule_gid); /* gid_eq(), gid_gt(), gid_lt() */
+ bool (*fowner_op)(vfsuid_t vfsuid, kuid_t rule_uid); /* vfsuid_eq_kuid(), vfsuid_gt_kuid(), vfsuid_lt_kuid() */
+ bool (*fgroup_op)(vfsgid_t vfsgid, kgid_t rule_gid); /* vfsgid_eq_kgid(), vfsgid_gt_kgid(), vfsgid_lt_kgid() */
int pcr;
unsigned int allowed_algos; /* bitfield of allowed hash algorithms */
struct {
@@ -186,11 +186,11 @@ static struct ima_rule_entry default_appraise_rules[] __ro_after_init = {
.flags = IMA_FUNC | IMA_DIGSIG_REQUIRED},
#endif
#ifndef CONFIG_IMA_APPRAISE_SIGNED_INIT
- {.action = APPRAISE, .fowner = GLOBAL_ROOT_UID, .fowner_op = &uid_eq,
+ {.action = APPRAISE, .fowner = GLOBAL_ROOT_UID, .fowner_op = &vfsuid_eq_kuid,
.flags = IMA_FOWNER},
#else
/* force signature */
- {.action = APPRAISE, .fowner = GLOBAL_ROOT_UID, .fowner_op = &uid_eq,
+ {.action = APPRAISE, .fowner = GLOBAL_ROOT_UID, .fowner_op = &vfsuid_eq_kuid,
.flags = IMA_FOWNER | IMA_DIGSIG_REQUIRED},
#endif
};
@@ -601,10 +601,12 @@ static bool ima_match_rules(struct ima_rule_entry *rule,
return false;
}
if ((rule->flags & IMA_FOWNER) &&
- !rule->fowner_op(i_uid_into_mnt(mnt_userns, inode), rule->fowner))
+ !rule->fowner_op(i_uid_into_vfsuid(mnt_userns, inode),
+ rule->fowner))
return false;
if ((rule->flags & IMA_FGROUP) &&
- !rule->fgroup_op(i_gid_into_mnt(mnt_userns, inode), rule->fgroup))
+ !rule->fgroup_op(i_gid_into_vfsgid(mnt_userns, inode),
+ rule->fgroup))
return false;
for (i = 0; i < MAX_LSM_RULES; i++) {
int rc = 0;
@@ -1371,8 +1373,8 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
entry->fgroup = INVALID_GID;
entry->uid_op = &uid_eq;
entry->gid_op = &gid_eq;
- entry->fowner_op = &uid_eq;
- entry->fgroup_op = &gid_eq;
+ entry->fowner_op = &vfsuid_eq_kuid;
+ entry->fgroup_op = &vfsgid_eq_kgid;
entry->action = UNKNOWN;
while ((p = strsep(&rule, " \t")) != NULL) {
substring_t args[MAX_OPT_ARGS];
@@ -1650,11 +1652,11 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
}
break;
case Opt_fowner_gt:
- entry->fowner_op = &uid_gt;
+ entry->fowner_op = &vfsuid_gt_kuid;
fallthrough;
case Opt_fowner_lt:
if (token == Opt_fowner_lt)
- entry->fowner_op = &uid_lt;
+ entry->fowner_op = &vfsuid_lt_kuid;
fallthrough;
case Opt_fowner_eq:
ima_log_string_op(ab, "fowner", args[0].from, token);
@@ -1676,11 +1678,11 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
}
break;
case Opt_fgroup_gt:
- entry->fgroup_op = &gid_gt;
+ entry->fgroup_op = &vfsgid_gt_kgid;
fallthrough;
case Opt_fgroup_lt:
if (token == Opt_fgroup_lt)
- entry->fgroup_op = &gid_lt;
+ entry->fgroup_op = &vfsgid_lt_kgid;
fallthrough;
case Opt_fgroup_eq:
ima_log_string_op(ab, "fgroup", args[0].from, token);
@@ -2151,9 +2153,9 @@ int ima_policy_show(struct seq_file *m, void *v)
if (entry->flags & IMA_FOWNER) {
snprintf(tbuf, sizeof(tbuf), "%d", __kuid_val(entry->fowner));
- if (entry->fowner_op == &uid_gt)
+ if (entry->fowner_op == &vfsuid_gt_kuid)
seq_printf(m, pt(Opt_fowner_gt), tbuf);
- else if (entry->fowner_op == &uid_lt)
+ else if (entry->fowner_op == &vfsuid_lt_kuid)
seq_printf(m, pt(Opt_fowner_lt), tbuf);
else
seq_printf(m, pt(Opt_fowner_eq), tbuf);
@@ -2162,9 +2164,9 @@ int ima_policy_show(struct seq_file *m, void *v)
if (entry->flags & IMA_FGROUP) {
snprintf(tbuf, sizeof(tbuf), "%d", __kgid_val(entry->fgroup));
- if (entry->fgroup_op == &gid_gt)
+ if (entry->fgroup_op == &vfsgid_gt_kgid)
seq_printf(m, pt(Opt_fgroup_gt), tbuf);
- else if (entry->fgroup_op == &gid_lt)
+ else if (entry->fgroup_op == &vfsgid_lt_kgid)
seq_printf(m, pt(Opt_fgroup_lt), tbuf);
else
seq_printf(m, pt(Opt_fgroup_eq), tbuf);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 08:24:33 +0100