mirror of
https://gitlab.com/apparmor/apparmor.git
synced 2025-03-07 01:41:00 +01:00
135 lines
5.1 KiB
Diff
135 lines
5.1 KiB
Diff
From: Tony Jones <tonyj@suse.de>
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Subject: Pass the struct vfsmounts to the inode_link LSM hook
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This is needed for computing pathnames in the AppArmor LSM.
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Signed-off-by: Tony Jones <tonyj@suse.de>
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Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
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Signed-off-by: John Johansen <jjohansen@suse.de>
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---
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fs/namei.c | 3 ++-
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include/linux/security.h | 18 ++++++++++++------
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security/dummy.c | 6 ++++--
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security/security.c | 8 +++++---
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security/selinux/hooks.c | 9 +++++++--
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5 files changed, 30 insertions(+), 14 deletions(-)
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--- a/fs/namei.c
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+++ b/fs/namei.c
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@@ -2507,7 +2507,8 @@ int vfs_link(struct dentry *old_dentry,
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if (S_ISDIR(old_dentry->d_inode->i_mode))
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return -EPERM;
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- error = security_inode_link(old_dentry, dir, new_dentry);
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+ error = security_inode_link(old_dentry, old_mnt, dir, new_dentry,
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+ new_mnt);
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if (error)
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return error;
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--- a/include/linux/security.h
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+++ b/include/linux/security.h
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@@ -347,8 +347,10 @@ static inline void security_free_mnt_opt
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* @inode_link:
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* Check permission before creating a new hard link to a file.
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* @old_dentry contains the dentry structure for an existing link to the file.
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+ * @old_mnt is the vfsmount corresponding to @old_dentry (may be NULL).
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* @dir contains the inode structure of the parent directory of the new link.
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* @new_dentry contains the dentry structure for the new link.
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+ * @new_mnt is the vfsmount corresponding to @new_dentry (may be NULL).
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* Return 0 if permission is granted.
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* @inode_unlink:
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* Check the permission to remove a hard link to a file.
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@@ -1363,8 +1365,9 @@ struct security_operations {
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char **name, void **value, size_t *len);
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int (*inode_create) (struct inode *dir, struct dentry *dentry,
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struct vfsmount *mnt, int mode);
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- int (*inode_link) (struct dentry *old_dentry,
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- struct inode *dir, struct dentry *new_dentry);
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+ int (*inode_link) (struct dentry *old_dentry, struct vfsmount *old_mnt,
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+ struct inode *dir, struct dentry *new_dentry,
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+ struct vfsmount *new_mnt);
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int (*inode_unlink) (struct inode *dir, struct dentry *dentry);
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int (*inode_symlink) (struct inode *dir, struct dentry *dentry,
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struct vfsmount *mnt, const char *old_name);
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@@ -1638,8 +1641,9 @@ int security_inode_init_security(struct
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char **name, void **value, size_t *len);
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int security_inode_create(struct inode *dir, struct dentry *dentry,
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struct vfsmount *mnt, int mode);
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-int security_inode_link(struct dentry *old_dentry, struct inode *dir,
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- struct dentry *new_dentry);
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+int security_inode_link(struct dentry *old_dentry, struct vfsmount *old_mnt,
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+ struct inode *dir, struct dentry *new_dentry,
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+ struct vfsmount *new_mnt);
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int security_inode_unlink(struct inode *dir, struct dentry *dentry);
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int security_inode_symlink(struct inode *dir, struct dentry *dentry,
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struct vfsmount *mnt, const char *old_name);
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@@ -1987,8 +1991,10 @@ static inline int security_inode_create(
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}
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static inline int security_inode_link(struct dentry *old_dentry,
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- struct inode *dir,
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- struct dentry *new_dentry)
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+ struct vfsmount *old_mnt,
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+ struct inode *dir,
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+ struct dentry *new_dentry,
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+ struct vfsmount *new_mnt)
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{
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return 0;
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}
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--- a/security/dummy.c
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+++ b/security/dummy.c
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@@ -294,8 +294,10 @@ static int dummy_inode_create (struct in
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return 0;
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}
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-static int dummy_inode_link (struct dentry *old_dentry, struct inode *inode,
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- struct dentry *new_dentry)
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+static int dummy_inode_link (struct dentry *old_dentry,
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+ struct vfsmount *old_mnt, struct inode *inode,
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+ struct dentry *new_dentry,
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+ struct vfsmount *new_mnt)
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{
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return 0;
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}
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--- a/security/security.c
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+++ b/security/security.c
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@@ -396,12 +396,14 @@ int security_inode_create(struct inode *
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return security_ops->inode_create(dir, dentry, mnt, mode);
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}
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-int security_inode_link(struct dentry *old_dentry, struct inode *dir,
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- struct dentry *new_dentry)
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+int security_inode_link(struct dentry *old_dentry, struct vfsmount *old_mnt,
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+ struct inode *dir, struct dentry *new_dentry,
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+ struct vfsmount *new_mnt)
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{
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if (unlikely(IS_PRIVATE(old_dentry->d_inode)))
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return 0;
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- return security_ops->inode_link(old_dentry, dir, new_dentry);
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+ return security_ops->inode_link(old_dentry, old_mnt, dir,
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+ new_dentry, new_mnt);
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}
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int security_inode_unlink(struct inode *dir, struct dentry *dentry)
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--- a/security/selinux/hooks.c
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+++ b/security/selinux/hooks.c
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@@ -2513,11 +2513,16 @@ static int selinux_inode_create(struct i
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return may_create(dir, dentry, SECCLASS_FILE);
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}
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-static int selinux_inode_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry)
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+static int selinux_inode_link(struct dentry *old_dentry,
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+ struct vfsmount *old_mnt,
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+ struct inode *dir,
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+ struct dentry *new_dentry
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+ struct vfsmount *new_mnt)
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{
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int rc;
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- rc = secondary_ops->inode_link(old_dentry, dir, new_dentry);
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+ rc = secondary_ops->inode_link(old_dentry, old_mnt, dir, new_dentry,
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+ new_mnt);
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if (rc)
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return rc;
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return may_link(dir, old_dentry, MAY_LINK);
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