mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 02:00:54 +07:00
CRED: Pass credentials through dentry_open()
Pass credentials through dentry_open() so that the COW creds patch can have SELinux's flush_unauthorized_files() pass the appropriate creds back to itself when it opens its null chardev. The security_dentry_open() call also now takes a creds pointer, as does the dentry_open hook in struct security_operations. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
parent
88e67f3b88
commit
745ca2475a
@ -323,7 +323,7 @@ static int spufs_context_open(struct dentry *dentry, struct vfsmount *mnt)
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goto out;
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}
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filp = dentry_open(dentry, mnt, O_RDONLY);
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filp = dentry_open(dentry, mnt, O_RDONLY, current_cred());
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if (IS_ERR(filp)) {
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put_unused_fd(ret);
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ret = PTR_ERR(filp);
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@ -562,7 +562,7 @@ static int spufs_gang_open(struct dentry *dentry, struct vfsmount *mnt)
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goto out;
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}
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filp = dentry_open(dentry, mnt, O_RDONLY);
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filp = dentry_open(dentry, mnt, O_RDONLY, current_cred());
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if (IS_ERR(filp)) {
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put_unused_fd(ret);
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ret = PTR_ERR(filp);
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@ -159,7 +159,8 @@ void mconsole_proc(struct mc_request *req)
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goto out_kill;
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}
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file = dentry_open(nd.path.dentry, nd.path.mnt, O_RDONLY);
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file = dentry_open(nd.path.dentry, nd.path.mnt, O_RDONLY,
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current_cred());
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if (IS_ERR(file)) {
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mconsole_reply(req, "Failed to open file", 1, 0);
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goto out_kill;
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@ -307,7 +307,8 @@ static int autofs_dev_ioctl_open_mountpoint(const char *path, dev_t devid)
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goto out;
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}
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filp = dentry_open(nd.path.dentry, nd.path.mnt, O_RDONLY);
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filp = dentry_open(nd.path.dentry, nd.path.mnt, O_RDONLY,
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current_cred());
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if (IS_ERR(filp)) {
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err = PTR_ERR(filp);
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goto out;
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@ -691,7 +691,8 @@ int ecryptfs_init_kthread(void);
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void ecryptfs_destroy_kthread(void);
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int ecryptfs_privileged_open(struct file **lower_file,
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struct dentry *lower_dentry,
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struct vfsmount *lower_mnt);
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struct vfsmount *lower_mnt,
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const struct cred *cred);
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int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry);
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#endif /* #ifndef ECRYPTFS_KERNEL_H */
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@ -73,7 +73,7 @@ static int ecryptfs_threadfn(void *ignored)
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mntget(req->lower_mnt);
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(*req->lower_file) = dentry_open(
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req->lower_dentry, req->lower_mnt,
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(O_RDWR | O_LARGEFILE));
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(O_RDWR | O_LARGEFILE), current_cred());
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req->flags |= ECRYPTFS_REQ_PROCESSED;
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}
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wake_up(&req->wait);
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@ -132,7 +132,8 @@ void ecryptfs_destroy_kthread(void)
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*/
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int ecryptfs_privileged_open(struct file **lower_file,
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struct dentry *lower_dentry,
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struct vfsmount *lower_mnt)
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struct vfsmount *lower_mnt,
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const struct cred *cred)
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{
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struct ecryptfs_open_req *req;
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int rc = 0;
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@ -143,7 +144,7 @@ int ecryptfs_privileged_open(struct file **lower_file,
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dget(lower_dentry);
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mntget(lower_mnt);
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(*lower_file) = dentry_open(lower_dentry, lower_mnt,
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(O_RDWR | O_LARGEFILE));
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(O_RDWR | O_LARGEFILE), cred);
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if (!IS_ERR(*lower_file))
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goto out;
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req = kmem_cache_alloc(ecryptfs_open_req_cache, GFP_KERNEL);
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@ -184,7 +185,7 @@ int ecryptfs_privileged_open(struct file **lower_file,
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dget(lower_dentry);
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mntget(lower_mnt);
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(*lower_file) = dentry_open(lower_dentry, lower_mnt,
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(O_RDONLY | O_LARGEFILE));
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(O_RDONLY | O_LARGEFILE), cred);
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if (IS_ERR(*lower_file)) {
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rc = PTR_ERR(*req->lower_file);
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(*lower_file) = NULL;
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@ -115,6 +115,7 @@ void __ecryptfs_printk(const char *fmt, ...)
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*/
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int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
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{
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const struct cred *cred = current_cred();
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struct ecryptfs_inode_info *inode_info =
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ecryptfs_inode_to_private(ecryptfs_dentry->d_inode);
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int rc = 0;
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@ -127,7 +128,7 @@ int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
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lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
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rc = ecryptfs_privileged_open(&inode_info->lower_file,
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lower_dentry, lower_mnt);
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lower_dentry, lower_mnt, cred);
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if (rc || IS_ERR(inode_info->lower_file)) {
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printk(KERN_ERR "Error opening lower persistent file "
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"for lower_dentry [0x%p] and lower_mnt [0x%p]; "
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@ -14,6 +14,7 @@
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#include <linux/module.h>
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#include <linux/mount.h>
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#include <linux/namei.h>
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#include <linux/sched.h>
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#define dprintk(fmt, args...) do{}while(0)
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@ -249,6 +250,7 @@ static int filldir_one(void * __buf, const char * name, int len,
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static int get_name(struct vfsmount *mnt, struct dentry *dentry,
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char *name, struct dentry *child)
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{
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const struct cred *cred = current_cred();
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struct inode *dir = dentry->d_inode;
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int error;
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struct file *file;
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@ -263,7 +265,7 @@ static int get_name(struct vfsmount *mnt, struct dentry *dentry,
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/*
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* Open the directory ...
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*/
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file = dentry_open(dget(dentry), mntget(mnt), O_RDONLY);
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file = dentry_open(dget(dentry), mntget(mnt), O_RDONLY, cred);
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error = PTR_ERR(file);
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if (IS_ERR(file))
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goto out;
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@ -426,6 +426,7 @@ static int file_mode(int fmode)
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static int hppfs_open(struct inode *inode, struct file *file)
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{
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const struct cred *cred = current_cred();
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struct hppfs_private *data;
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struct vfsmount *proc_mnt;
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struct dentry *proc_dentry;
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@ -446,7 +447,7 @@ static int hppfs_open(struct inode *inode, struct file *file)
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/* XXX This isn't closed anywhere */
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data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
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file_mode(file->f_mode));
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file_mode(file->f_mode), cred);
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err = PTR_ERR(data->proc_file);
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if (IS_ERR(data->proc_file))
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goto out_free1;
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@ -489,6 +490,7 @@ static int hppfs_open(struct inode *inode, struct file *file)
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static int hppfs_dir_open(struct inode *inode, struct file *file)
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{
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const struct cred *cred = current_cred();
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struct hppfs_private *data;
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struct vfsmount *proc_mnt;
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struct dentry *proc_dentry;
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@ -502,7 +504,7 @@ static int hppfs_dir_open(struct inode *inode, struct file *file)
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proc_dentry = HPPFS_I(inode)->proc_dentry;
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proc_mnt = inode->i_sb->s_fs_info;
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data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
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file_mode(file->f_mode));
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file_mode(file->f_mode), cred);
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err = PTR_ERR(data->proc_file);
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if (IS_ERR(data->proc_file))
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goto out_free;
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@ -41,7 +41,8 @@ static struct file *do_open(char *name, int flags)
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error = may_open(&nd, MAY_WRITE, FMODE_WRITE);
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if (!error)
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return dentry_open(nd.path.dentry, nd.path.mnt, flags);
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return dentry_open(nd.path.dentry, nd.path.mnt, flags,
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current_cred());
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path_put(&nd.path);
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return ERR_PTR(error);
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@ -226,7 +226,8 @@ nfsd4_list_rec_dir(struct dentry *dir, recdir_func *f)
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nfs4_save_user(&uid, &gid);
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filp = dentry_open(dget(dir), mntget(rec_dir.mnt), O_RDONLY);
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filp = dentry_open(dget(dir), mntget(rec_dir.mnt), O_RDONLY,
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current_cred());
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status = PTR_ERR(filp);
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if (IS_ERR(filp))
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goto out;
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@ -671,6 +671,7 @@ __be32
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nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
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int access, struct file **filp)
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{
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const struct cred *cred = current_cred();
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struct dentry *dentry;
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struct inode *inode;
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int flags = O_RDONLY|O_LARGEFILE;
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@ -725,7 +726,7 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
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DQUOT_INIT(inode);
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}
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*filp = dentry_open(dget(dentry), mntget(fhp->fh_export->ex_path.mnt),
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flags);
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flags, cred);
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if (IS_ERR(*filp))
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host_err = PTR_ERR(*filp);
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out_nfserr:
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17
fs/open.c
17
fs/open.c
@ -783,7 +783,8 @@ static inline int __get_file_write_access(struct inode *inode,
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static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
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int flags, struct file *f,
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int (*open)(struct inode *, struct file *))
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int (*open)(struct inode *, struct file *),
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const struct cred *cred)
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{
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struct inode *inode;
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int error;
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@ -807,7 +808,7 @@ static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
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f->f_op = fops_get(inode->i_fop);
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file_move(f, &inode->i_sb->s_files);
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error = security_dentry_open(f);
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error = security_dentry_open(f, cred);
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if (error)
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goto cleanup_all;
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@ -882,6 +883,8 @@ static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
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struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry,
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int (*open)(struct inode *, struct file *))
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{
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const struct cred *cred = current_cred();
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if (IS_ERR(nd->intent.open.file))
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goto out;
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if (IS_ERR(dentry))
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@ -889,7 +892,7 @@ struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry
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nd->intent.open.file = __dentry_open(dget(dentry), mntget(nd->path.mnt),
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nd->intent.open.flags - 1,
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nd->intent.open.file,
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open);
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open, cred);
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out:
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return nd->intent.open.file;
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out_err:
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@ -908,6 +911,7 @@ EXPORT_SYMBOL_GPL(lookup_instantiate_filp);
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*/
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struct file *nameidata_to_filp(struct nameidata *nd, int flags)
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{
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const struct cred *cred = current_cred();
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struct file *filp;
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/* Pick up the filp from the open intent */
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@ -915,7 +919,7 @@ struct file *nameidata_to_filp(struct nameidata *nd, int flags)
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/* Has the filesystem initialised the file for us? */
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if (filp->f_path.dentry == NULL)
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filp = __dentry_open(nd->path.dentry, nd->path.mnt, flags, filp,
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NULL);
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NULL, cred);
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else
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path_put(&nd->path);
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return filp;
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@ -925,7 +929,8 @@ struct file *nameidata_to_filp(struct nameidata *nd, int flags)
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* dentry_open() will have done dput(dentry) and mntput(mnt) if it returns an
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* error.
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*/
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struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags)
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struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags,
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const struct cred *cred)
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{
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int error;
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struct file *f;
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@ -950,7 +955,7 @@ struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags)
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return ERR_PTR(error);
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}
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return __dentry_open(dentry, mnt, flags, f, NULL);
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return __dentry_open(dentry, mnt, flags, f, NULL, cred);
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}
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EXPORT_SYMBOL(dentry_open);
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@ -256,6 +256,7 @@ xfs_open_by_handle(
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struct file *parfilp,
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struct inode *parinode)
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{
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const struct cred *cred = current_cred();
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int error;
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int new_fd;
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int permflag;
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@ -321,7 +322,7 @@ xfs_open_by_handle(
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mntget(parfilp->f_path.mnt);
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/* Create file pointer. */
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filp = dentry_open(dentry, parfilp->f_path.mnt, hreq.oflags);
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filp = dentry_open(dentry, parfilp->f_path.mnt, hreq.oflags, cred);
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if (IS_ERR(filp)) {
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put_unused_fd(new_fd);
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return -XFS_ERROR(-PTR_ERR(filp));
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@ -315,6 +315,7 @@ struct poll_table_struct;
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struct kstatfs;
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struct vm_area_struct;
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struct vfsmount;
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struct cred;
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extern void __init inode_init(void);
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extern void __init inode_init_early(void);
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@ -1673,7 +1674,8 @@ extern int do_truncate(struct dentry *, loff_t start, unsigned int time_attrs,
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extern long do_sys_open(int dfd, const char __user *filename, int flags,
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int mode);
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extern struct file *filp_open(const char *, int, int);
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extern struct file * dentry_open(struct dentry *, struct vfsmount *, int);
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extern struct file * dentry_open(struct dentry *, struct vfsmount *, int,
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const struct cred *);
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extern int filp_close(struct file *, fl_owner_t id);
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extern char * getname(const char __user *);
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@ -1402,7 +1402,7 @@ struct security_operations {
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int (*file_send_sigiotask) (struct task_struct *tsk,
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struct fown_struct *fown, int sig);
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int (*file_receive) (struct file *file);
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int (*dentry_open) (struct file *file);
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int (*dentry_open) (struct file *file, const struct cred *cred);
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int (*task_create) (unsigned long clone_flags);
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int (*cred_alloc_security) (struct cred *cred);
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@ -1658,7 +1658,7 @@ int security_file_set_fowner(struct file *file);
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int security_file_send_sigiotask(struct task_struct *tsk,
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struct fown_struct *fown, int sig);
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int security_file_receive(struct file *file);
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int security_dentry_open(struct file *file);
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int security_dentry_open(struct file *file, const struct cred *cred);
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int security_task_create(unsigned long clone_flags);
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int security_cred_alloc(struct cred *cred);
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void security_cred_free(struct cred *cred);
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@ -2171,7 +2171,8 @@ static inline int security_file_receive(struct file *file)
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return 0;
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}
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static inline int security_dentry_open(struct file *file)
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static inline int security_dentry_open(struct file *file,
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const struct cred *cred)
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{
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return 0;
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}
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|
11
ipc/mqueue.c
11
ipc/mqueue.c
@ -594,6 +594,7 @@ static int mq_attr_ok(struct mq_attr *attr)
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static struct file *do_create(struct dentry *dir, struct dentry *dentry,
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int oflag, mode_t mode, struct mq_attr __user *u_attr)
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{
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const struct cred *cred = current_cred();
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struct mq_attr attr;
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struct file *result;
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int ret;
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@ -618,7 +619,7 @@ static struct file *do_create(struct dentry *dir, struct dentry *dentry,
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if (ret)
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goto out_drop_write;
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result = dentry_open(dentry, mqueue_mnt, oflag);
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result = dentry_open(dentry, mqueue_mnt, oflag, cred);
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/*
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* dentry_open() took a persistent mnt_want_write(),
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* so we can now drop this one.
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@ -637,8 +638,10 @@ static struct file *do_create(struct dentry *dir, struct dentry *dentry,
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/* Opens existing queue */
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static struct file *do_open(struct dentry *dentry, int oflag)
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{
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static int oflag2acc[O_ACCMODE] = { MAY_READ, MAY_WRITE,
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MAY_READ | MAY_WRITE };
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const struct cred *cred = current_cred();
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static const int oflag2acc[O_ACCMODE] = { MAY_READ, MAY_WRITE,
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MAY_READ | MAY_WRITE };
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if ((oflag & O_ACCMODE) == (O_RDWR | O_WRONLY)) {
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dput(dentry);
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@ -652,7 +655,7 @@ static int oflag2acc[O_ACCMODE] = { MAY_READ, MAY_WRITE,
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return ERR_PTR(-EACCES);
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}
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return dentry_open(dentry, mqueue_mnt, oflag);
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return dentry_open(dentry, mqueue_mnt, oflag, cred);
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}
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asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
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|
@ -330,7 +330,7 @@ static int cap_file_receive(struct file *file)
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return 0;
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}
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static int cap_dentry_open(struct file *file)
|
||||
static int cap_dentry_open(struct file *file, const struct cred *cred)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
@ -606,9 +606,9 @@ int security_file_receive(struct file *file)
|
||||
return security_ops->file_receive(file);
|
||||
}
|
||||
|
||||
int security_dentry_open(struct file *file)
|
||||
int security_dentry_open(struct file *file, const struct cred *cred)
|
||||
{
|
||||
return security_ops->dentry_open(file);
|
||||
return security_ops->dentry_open(file, cred);
|
||||
}
|
||||
|
||||
int security_task_create(unsigned long clone_flags)
|
||||
|
@ -2150,9 +2150,9 @@ extern struct vfsmount *selinuxfs_mount;
|
||||
extern struct dentry *selinux_null;
|
||||
|
||||
/* Derived from fs/exec.c:flush_old_files. */
|
||||
static inline void flush_unauthorized_files(struct files_struct *files)
|
||||
static inline void flush_unauthorized_files(const struct cred *cred,
|
||||
struct files_struct *files)
|
||||
{
|
||||
const struct cred *cred = current_cred();
|
||||
struct avc_audit_data ad;
|
||||
struct file *file, *devnull = NULL;
|
||||
struct tty_struct *tty;
|
||||
@ -2222,7 +2222,10 @@ static inline void flush_unauthorized_files(struct files_struct *files)
|
||||
if (devnull) {
|
||||
get_file(devnull);
|
||||
} else {
|
||||
devnull = dentry_open(dget(selinux_null), mntget(selinuxfs_mount), O_RDWR);
|
||||
devnull = dentry_open(
|
||||
dget(selinux_null),
|
||||
mntget(selinuxfs_mount),
|
||||
O_RDWR, cred);
|
||||
if (IS_ERR(devnull)) {
|
||||
devnull = NULL;
|
||||
put_unused_fd(fd);
|
||||
@ -2302,6 +2305,7 @@ static void selinux_bprm_apply_creds(struct linux_binprm *bprm, int unsafe)
|
||||
*/
|
||||
static void selinux_bprm_post_apply_creds(struct linux_binprm *bprm)
|
||||
{
|
||||
const struct cred *cred = current_cred();
|
||||
struct task_security_struct *tsec;
|
||||
struct rlimit *rlim, *initrlim;
|
||||
struct itimerval itimer;
|
||||
@ -2321,7 +2325,7 @@ static void selinux_bprm_post_apply_creds(struct linux_binprm *bprm)
|
||||
return;
|
||||
|
||||
/* Close files for which the new task SID is not authorized. */
|
||||
flush_unauthorized_files(current->files);
|
||||
flush_unauthorized_files(cred, current->files);
|
||||
|
||||
/* Check whether the new SID can inherit signal state
|
||||
from the old SID. If not, clear itimers to avoid
|
||||
@ -3202,9 +3206,8 @@ static int selinux_file_receive(struct file *file)
|
||||
return file_has_perm(cred, file, file_to_av(file));
|
||||
}
|
||||
|
||||
static int selinux_dentry_open(struct file *file)
|
||||
static int selinux_dentry_open(struct file *file, const struct cred *cred)
|
||||
{
|
||||
const struct cred *cred = current_cred();
|
||||
struct file_security_struct *fsec;
|
||||
struct inode *inode;
|
||||
struct inode_security_struct *isec;
|
||||
|
Loading…
Reference in New Issue
Block a user