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Patch in this message | | | Date | Thu, 20 Dec 2007 06:09:21 -0800 | From | , | Subject | [AppArmor 11/47] Pass struct vfsmount to the inode_readlink LSM hook |
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This is needed for computing pathnames in the AppArmor LSM.
Signed-off-by: Tony Jones <tonyj@suse.de> Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Signed-off-by: John Johansen <jjohansen@suse.de>
--- fs/stat.c | 3 ++- include/linux/security.h | 8 +++++--- security/dummy.c | 2 +- security/security.c | 4 ++-- security/selinux/hooks.c | 2 +- 5 files changed, 11 insertions(+), 8 deletions(-)
--- a/fs/stat.c +++ b/fs/stat.c @@ -306,7 +306,8 @@ asmlinkage long sys_readlinkat(int dfd, error = -EINVAL; if (inode->i_op && inode->i_op->readlink) { - error = security_inode_readlink(nd.path.dentry); + error = security_inode_readlink(nd.path.dentry, + nd.path.mnt); if (!error) { touch_atime(nd.path.mnt, nd.path.dentry); error = inode->i_op->readlink(nd.path.dentry, --- a/include/linux/security.h +++ b/include/linux/security.h @@ -369,6 +369,7 @@ struct request_sock; * @inode_readlink: * Check the permission to read the symbolic link. * @dentry contains the dentry structure for the file link. + * @mnt is the vfsmount corresponding to @dentry (may be NULL). * Return 0 if permission is granted. * @inode_follow_link: * Check permission to follow a symbolic link when looking up a pathname. @@ -1291,7 +1292,7 @@ struct security_operations { struct vfsmount *mnt, int mode, dev_t dev); int (*inode_rename) (struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry); - int (*inode_readlink) (struct dentry *dentry); + int (*inode_readlink) (struct dentry *dentry, struct vfsmount *mnt); int (*inode_follow_link) (struct dentry *dentry, struct nameidata *nd); int (*inode_permission) (struct inode *inode, int mask, struct nameidata *nd); int (*inode_setattr) (struct dentry *dentry, struct vfsmount *mnt, @@ -1557,7 +1558,7 @@ int security_inode_mknod(struct inode *d struct vfsmount *mnt, int mode, dev_t dev); int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry); -int security_inode_readlink(struct dentry *dentry); +int security_inode_readlink(struct dentry *dentry, struct vfsmount *mnt); int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd); int security_inode_permission(struct inode *inode, int mask, struct nameidata *nd); int security_inode_setattr(struct dentry *dentry, struct vfsmount *mnt, @@ -1915,7 +1916,8 @@ static inline int security_inode_rename return 0; } -static inline int security_inode_readlink (struct dentry *dentry) +static inline int security_inode_readlink(struct dentry *dentry, + struct vfsmount *mnt) { return 0; } --- a/security/dummy.c +++ b/security/dummy.c @@ -337,7 +337,7 @@ static int dummy_inode_rename (struct in return 0; } -static int dummy_inode_readlink (struct dentry *dentry) +static int dummy_inode_readlink (struct dentry *dentry, struct vfsmount *mnt) { return 0; } --- a/security/security.c +++ b/security/security.c @@ -412,11 +412,11 @@ int security_inode_rename(struct inode * new_dir, new_dentry); } -int security_inode_readlink(struct dentry *dentry) +int security_inode_readlink(struct dentry *dentry, struct vfsmount *mnt) { if (unlikely(IS_PRIVATE(dentry->d_inode))) return 0; - return security_ops->inode_readlink(dentry); + return security_ops->inode_readlink(dentry, mnt); } int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd) --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -2472,7 +2472,7 @@ static int selinux_inode_rename(struct i return may_rename(old_inode, old_dentry, new_inode, new_dentry); } -static int selinux_inode_readlink(struct dentry *dentry) +static int selinux_inode_readlink(struct dentry *dentry, struct vfsmount *mnt) { return dentry_has_perm(current, NULL, dentry, FILE__READ); } --
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